JP2018138719A - Steel member longitudinal joint structure - Google Patents

Abstract

Provided is a cascade connection structure of steel members that can secure sufficient bending rigidity at a location where a plurality of steel members are connected in a material axis direction and can suppress the connection cost of the plurality of steel members. To do. A steel member cascade structure 1 to which the present invention is applied connects a plurality of steel members having a predetermined cross-sectional shape in a material axis direction Y, and a plurality of steel sheet piles 2 face each other. Each of the connecting members 5 is provided at the end 3 in the material axis direction Y, and the fixing member 7 is provided with the connecting member 5 sandwiched in the material axis direction Y. The connection member 5 includes a flat plate portion 51 and a connection-side protruding portion 50 that protrudes from the flat plate portion 51 toward one or both of the plurality of steel sheet piles 2, and a plurality of steel sheet piles. 2 is provided on the end portion 3 of the steel sheet pile 2 and the connection side projection 50 is formed on the base material side projection. The part 60 is locked in the material axis direction Y. [Selection] Figure 9

Description

  The present invention relates to a cascade structure of steel members that connect a plurality of steel members having a predetermined cross-sectional shape in the material axis direction.

  Conventionally, for example, a steel sheet pile joint structure disclosed in Patent Document 1 has been proposed as an inexpensive and simple construction that can reduce construction time and cost while ensuring water-stopping, rigidity, and proof strength of the longitudinal joint. Has been.

  The steel sheet pile joint structure disclosed in Patent Document 1 is a steel sheet pile joint structure that has at least one or more webs and flanges and connects steel sheet piles formed in a cross-sectionally bent shape up and down, A lower joint member that protrudes and is fixed from the surface of the web and the flange at at least two different locations of the web and flange at the upper end of the lower steel sheet pile, and the lower end of the upper steel sheet pile corresponding to the lower joint member The upper joint member that protrudes and is fixed from the surface of the web and the flange at at least two different locations of the web and the flange in the section, and the upper edge of the lower steel sheet pile and the lower edge of the upper steel sheet pile contact each other And a fixing means for fixing the lower joint member and the upper joint member in a state of being formed.

JP 2011-38288 A

  However, the joint structure of the steel sheet pile disclosed in Patent Document 1 is such that the cross-sectional performance of the steel sheet serving as the lower joint member and the upper joint member is smaller than the cross-sectional performance of the steel sheet pile connected up and down. When the bending rigidity of the longitudinal joint portion where only the side joint member and the upper joint member are arranged is lowered and a larger bending load than expected is applied, the longitudinal joint portion may become a structural weakness.

  In addition, there is a method of connecting a plurality of steel sheet piles by on-site welding. However, in steel sheet piles that have recently increased in cross-section, the cross-sectional area of each steel sheet pile is large and the amount of welding is increased. The welding time per location is long, and the construction period is prolonged especially when there are many locations of the longitudinal joints. And even by a method in which a plurality of steel sheet piles are connected by high-strength bolt friction joining, the shear strength per one high-strength bolt is not so high, and a large number of steel sheet piles are secured in order to ensure connection strength comparable to the cross-sectional performance of steel sheet piles. This requires high-strength bolts, which increases the size of the attachment plate and increases the processing cost. Also, tightening a large number of high-strength bolts increases the construction time and lengthens the construction period.

  Therefore, the present invention has been devised in view of the above-described problems, and the object of the present invention is to provide sufficient bending rigidity at a location where a plurality of steel members are connected in the axial direction. An object of the present invention is to provide a cascade structure of steel members and a steel wall capable of ensuring and suppressing the connection cost.

  The steel member cascade structure according to the first aspect of the present invention is a steel member cascade structure that connects a plurality of steel members having a predetermined cross-sectional shape in the material axis direction, and is opposed to each other by the plurality of steel members. A connecting member constructed at each end in the material axis direction, and a fixing member provided with the connecting member sandwiched in the material axis direction, wherein the connecting member is one of a plurality of steel members. A flat plate portion that is continuous in the material axis direction from the end portion to the other end portion; and a connection-side protrusion portion that protrudes from the flat plate portion toward one or both of the plurality of steel members. A base material-side protruding portion that protrudes from one or both of the plurality of steel members toward the flat plate portion is provided at the end portion of the steel member, and the connection The side projection is locked to the base material side projection in the direction of the material axis.

  The cascade structure of steel members according to a second aspect of the present invention is the first aspect, wherein the fixing member is provided so as to surround the connecting member, and the connecting member includes both end faces and walls in the axial direction of the connecting member. Both side surfaces in the width direction are in a state of being restrained by the fixing member.

  The cascade structure of steel members according to a third invention is the first invention or the second invention, wherein the fixing member is a pair of flat plate members provided opposite to each other, and each one end portion of the pair of flat plate members. And a pair of shaft members provided between the other end portions and facing each other, and either one of the pair of flat plate members or the pair of shaft members is the connecting member. Is provided so as to sandwich the connecting member in the wall width direction.

  The cascade structure of steel members according to a fourth invention is the first invention or the second invention, wherein the fixing member is integrally formed with each one end portion of a pair of flat plate members provided to face each other. Two flat plate members and a shaft member provided between the other end portions of the pair of flat plate members and provided facing the one flat plate member, and the pair of flat plate members or the one flat plate member One of the flat plate member and the shaft member is provided with the connecting member sandwiched in the material axis direction, and the other is provided with the connecting member sandwiched in the wall width direction.

  The cascade structure of steel members according to a fifth aspect of the present invention is the first aspect or the second aspect, wherein the fixing member includes the connection side protrusion and the base material side protrusion that are locked together in the material axis direction. It is characterized in that a wire rod that is integrally provided surrounding the wire is used.

  In the cascade structure of steel members according to a sixth aspect of the present invention, in any one of the first to fifth aspects, the base material-side protruding portion is provided at one or both of the end portions of the plurality of steel members. A plate member is attached and formed to protrude from the plate member toward the flat plate portion.

  According to a seventh aspect of the present invention, there is provided the cascade structure of steel members according to any one of the first to sixth aspects, wherein the fixing member protrudes from the connecting member, the plate member, or the steel member and extends in the material axial direction. It arrange | positions between the support part which has an existing latching part, and a board member or a steel member, and is arrange | positioned between the material axis orthogonal directions.

  The cascade structure of steel members according to an eighth aspect of the invention is any one of the first to seventh aspects of the invention, wherein the connecting member is inclined in a tapered shape toward the end of the steel member. The protruding portion is brought into contact with the base material side protruding portion inclined in a tapered shape toward the flat plate portion, and is locked to the base material side protruding portion in a direction perpendicular to the material axis.

  According to a ninth aspect of the present invention, in the eighth aspect of the present invention, the connecting member includes a plurality of connection-side protrusions that are engaged with the plurality of base-material-side protrusions. In the state where one end surface in the material axis direction of each of the coupling side projections facing each other is formed to be substantially parallel to each other, and the coupling side projection is locked to the base material side projection, One end surface in the material axis direction of the connection-side protruding portion and the one end surface in the material axis direction of the base material-side protruding portion are formed so as to be substantially parallel to each other.

  The cascade structure of steel members according to a tenth aspect of the invention is any one of the first to ninth aspects of the invention, wherein the connecting member is a projection of the connecting-side protruding portion that protrudes toward the end of the steel member. On the tip side, a connection side extension part extended in the material axis direction is formed, and formed in the material axis direction on the tip side of the base material side projection part protruding toward the flat plate part. The connecting side extending portion is locked to the base material side extending portion in the direction perpendicular to the material axis.

  According to an eleventh aspect of the present invention, there is provided a cascade structure of steel members according to any one of the first to tenth aspects of the present invention, wherein the connecting member is either one of a plurality of steel members or both ends of the material shaft. A bolt penetrated from the flat plate portion to the end portion is screwed to a fastening nut tightened in an orthogonal direction.

  In the cascade structure of steel members according to the twelfth aspect of the present invention, in any of the first to eleventh aspects, a steel sheet pile is used as each of the plurality of steel members connected in the axial direction. In addition, the connecting member is constructed on a flat surface formed in a substantially flat shape of the steel sheet pile.

  According to 1st invention-12th invention, the distance from the neutral axis of the bending load which acts on a steel member to the gravity center of a connection member is substantially the same as the flange part of a steel sheet pile used as a steel member, an arm part, etc. Thus, even when a connecting member having a cross-sectional area similar to that of a steel sheet pile is installed, the bending rigidity and bending strength of the connecting member can be secured to the same extent as those of a steel sheet pile alone.

  According to the first to twelfth inventions, the connecting member is installed at a position separated from the neutral axis of the bending load, so that the thickness of the connecting member is reduced at the location where the plurality of steel members are connected. However, since it can sufficiently resist the bending load, it is possible to secure sufficient bending rigidity, and at the same time, it is possible to reduce the connection cost of a plurality of steel members by making the connection member lightweight and compact.

  According to the first to twelfth inventions, the plurality of steel members connected in the material axis direction are locked in the material axis direction by the connecting members, thereby resisting the tensile force acting on the plurality of steel members. The height of the connecting side protrusion and base metal side protrusion in the direction perpendicular to the material axis is reduced to about 70% of the plate thickness of the steel member, making the connecting member lighter and more compact. It becomes possible to do.

  According to the first to twelfth inventions, since sufficient bending rigidity can be secured at a location where a plurality of steel members are connected, the location where the plurality of steel members are connected does not become a structural weakness. It is possible to avoid a decrease in the bending performance of the entire connected steel member in which a plurality of steel members are connected in the material axis direction.

  According to the first to twelfth inventions, the fixing member is provided with the connecting member sandwiched in the material axis direction. For this reason, even when an eccentric bending is applied to the connecting member, the connecting member is locked by the fixing member, and the warpage deformation is suppressed, thereby preventing the connecting member from being detached.

  In particular, according to the second to twelfth inventions, both end surfaces in the material axis direction and both side surfaces in the wall width direction of the connecting member are constrained by the fixing member, so that the connecting member moves in the wall width direction. Is restrained, and it is possible to prevent the connecting member from falling off.

  In particular, according to the third to fifth inventions, since a flat plate member and a shaft member, or a wire rod are used as the fixing member, no prior processing is required for attaching the fixing member, improving workability and processing cost. Can be reduced.

  In particular, according to the seventh aspect, since the fixing member is disposed between the support portion and the plate member or the steel member in the direction perpendicular to the material axis, it can be prevented from coming off from the connecting member in the direction perpendicular to the material axis. And it becomes possible to suppress reliably the curvature deformation of a connection member.

  In particular, according to the eighth to tenth inventions, the connection side protrusion and the base material side protrusion are formed in a substantially trapezoidal cross section or a substantially T cross section, so that the connection member is separated in the direction perpendicular to the material axis. It is possible to improve the water stop performance of the steel member by preventing the connection member from falling off without using the bolt that penetrates the end of the steel member in the direction perpendicular to the material axis. It becomes.

It is a perspective view which shows the cascade structure of the steel members to which this invention is applied. It is a front view which shows the edge part of a steel sheet pile in the cascade structure of the steel member to which this invention is applied. It is a top view which shows the connection member erected only in the flange part of the hat-shaped steel sheet pile by the cascade structure of the steel member to which this invention is applied. It is a top view which shows the connection member constructed by the U-shaped steel sheet pile by the cascade structure of the steel member to which this invention is applied. It is a top view which shows the connection member constructed by Z-shaped steel sheet pile by the cascade structure of the steel member to which this invention is applied. It is a top view which shows the connection member constructed by the flange part and web part of a hat-shaped steel sheet pile by the cascade structure of the steel member to which this invention is applied. It is a top view which shows the connection member constructed by the flange part and arm part of a hat-shaped steel sheet pile by the cascade structure of the steel member to which this invention is applied. It is a top view which shows the connection member constructed across the flange part and arm part of the hat-shaped steel sheet pile by the cascade structure of the steel member to which this invention is applied. (A) is the front view which shows the base material side protrusion provided in the plate member of the edge part of a steel sheet pile by the cascade structure of the steel member to which this invention is applied, (b) is the side view. (C) is a side view excluding the fixing member. (A) is a side view which shows the base material side protrusion part provided in the both ends of the steel sheet pile by the cascade structure of the steel member to which this invention is applied, (b) is the one end It is a side view which shows the base material side protrusion part provided only in the part. It is a side view which shows the connection side protrusion part and base material side protrusion part which were formed in the cross-sectional substantially trapezoid shape by the cascade structure of the steel member to which this invention is applied. It is a side view which shows the connection side protrusion part and base material side protrusion part which were formed in the cross-section substantially T shape by the cascade structure of the steel member to which this invention is applied. (A) is the side view which shows the connection side protrusion part and base material side protrusion part which were formed in the mutually parallel structure in the cascade structure of the steel members to which this invention is applied, (b) is the expansion side surface FIG. (A) is a front view which shows a fixing member by the cascade structure of the steel members to which this invention is applied, (b) is a perspective view which shows a fixing member. (A) is an enlarged perspective view showing an example in which a flat plate member and a shaft member are used as a fixing member in a cascade structure of steel members to which the present invention is applied, and (b) and (c) are fixed It is an expansion perspective view which shows the other example in which the flat member and the shaft member were used as a member. It is a side view which shows the modification of the flat plate part used as a fixing member in the cascade structure of the steel member to which this invention is applied. (A) is a front view which shows the other example of a fixing member with the cascade structure of the steel member to which this invention is applied, (b) And (c) is a perspective view which shows the other example of a fixing member. It is. (A) is a front view which shows the further another example of a fixing member with the cascade structure of the steel member to which this invention is applied, (b) and (c) show the further another example of a fixing member. It is a perspective view. (A) is a front view which shows the example by which the wire was used as a fixing member in the longitudinal connection structure of the steel member to which this invention is applied, (b) is the expansion perspective view. (A) is an expanded perspective view which shows the support part which protruded and provided from the connection member in the cascade structure of the steel member to which this invention is applied, (b) is the support part provided and protruded from the plate member. (C) is an enlarged perspective view which shows the support part which protruded from the steel sheet pile and was provided. It is a perspective view which shows the state which moves the connection member in which the connection side protrusion part of the cross-sectional substantially rectangular shape was formed in the cascade structure of the steel member to which this invention is applied in a material axis orthogonal direction. It is a perspective view which shows the state which moves the connection member in which the connection side protrusion part of the cross-sectional substantially trapezoid shape or substantially T shape was formed in the cascade structure of the steel member to which this invention is applied. (A) is a front view showing a plate member cut and processed in a cascade structure of steel members to which the present invention is applied, and (b) is a front view showing the cut connecting member, (C) is a front view which shows the connection side protrusion part and base material side protrusion part which inclined in the wall width direction. It is a top view which shows the bending load which acts on a steel member by the cascade structure of the steel member to which this invention is applied. It is a top view which shows the H-section steel, square steel pipe, and round steel pipe which are used as a steel member by the cascade structure of the steel member to which this invention is applied.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the longitudinal connection structure 1 of the steel member to which this invention is applied is demonstrated in detail, referring drawings.

  The steel member cascade structure 1 to which the present invention is applied, as shown in FIG. 1, is embedded below and above the ground 99 in, for example, a narrow site where a long steel sheet pile 2 cannot be constructed. The short steel sheet piles 2 are used as a plurality of steel members to be connected to each other in the material axis direction Y.

  In the steel member cascade structure 1 to which the present invention is applied, by connecting a plurality of steel members in the material axis direction Y, a long connected steel member 90 is formed. The steel member cascade structure 1 to which the present invention is applied includes a plurality of steel members connected in the material axis direction Y as one connection steel member 90, and the plurality of connection steel members 90 in the wall width direction Z. Thus, the steel wall 9 is constructed in the ground 99 or the like.

  As shown in FIG. 2, the steel member cascade 1 to which the present invention is applied mainly uses a steel sheet pile 2 such as a hat-shaped steel sheet pile 21 as a steel member. The steel member cascade structure 1 to which the present invention is applied is a plurality of steel sheet piles 2 connected in the material axis direction Y, and the end portions 3 of each steel sheet pile 2 in the material axis direction Y face each other, The upper end 31 (one end) and the lower end 32 (the other end) of the plurality of steel sheet piles 2 are connected.

  A steel member cascade structure 1 to which the present invention is applied includes a connecting member 5 laid on end portions 3 in the material axial direction Y of the steel sheet piles 2 facing each other in the material axial direction Y, and a connecting member 5. And a fixing member 7 provided between the material axis directions Y. The steel member cascade structure 1 to which the present invention is applied is a connection of steel or the like that is continuous in the material axis direction Y across one end 31 and the other end 32 of the plurality of steel sheet piles 2. The member 5 is constructed and the some steel sheet pile 2 is connected.

  When the hat-shaped steel sheet pile 21 is used, the steel sheet pile 2 has a flange portion 2a, a pair of web portions 2b, a pair of arm portions 2c, and a pair of joint portions 2d as shown in FIG. . The steel sheet piles 2 are connected by connecting a plurality of steel sheet piles 2 arranged in the wall width direction Z to each other with the respective joint portions 2d, and are continuously provided in the wall width direction Z.

  The steel sheet pile 2 extends in the wall width direction Z to form the flange portion 2a, and from each end of the flange portion 2a in the wall width direction Z, each web portion 2b is formed to be inclined, A groove S is formed. As for the steel sheet pile 2, each arm part 2c is formed from one end of each web part 2b, and each joint part 2d is formed in the front-end | tip of each arm part 2c.

  The steel sheet pile 2 has a flat surface 20 formed in a substantially flat shape by forming the side surfaces of the flange portion 2a, the web portion 2b, and the arm portion 2c in a substantially flat shape. As the steel sheet pile 2, not only the hat-shaped steel sheet pile 21 but also a U-shaped steel sheet pile 22 or a Z-shaped steel sheet pile 23 may be used as shown in FIGS. 4 and 5, for example.

  When the U-shaped steel sheet pile 22 is used as shown in FIG. 4, the steel sheet pile 2 has a flange portion 2a, a pair of web portions 2b, and a pair of joint portions 2d. The side surface of the web portion 2b is a flat surface 20. Moreover, as shown in FIG. 5, when the Z-shaped steel sheet pile 23 is used, the steel sheet pile 2 has a web part 2b, a pair of arm parts 2c, and a pair of joint parts 2d. The side surfaces of 2b and the arm portion 2c become the flat surface 20.

  As shown in FIG. 3, the steel sheet pile 2 is not only provided with the connecting member 5 only on the flat surface 20 of the flange portion 2 a, but also as shown in FIG. 6, the flatness of the flange portion 2 a and the pair of web portions 2 b. The connecting member 5 may be installed on the surface 20. As for the steel sheet pile 2, as shown in FIG. 7, it is desirable for the connection member 5 to be constructed on the flat surface 20 of the flange part 2a and a pair of arm part 2c.

  For example, as shown in FIG. 8, the steel sheet pile 2 may have two connecting members 5 erected so as to sandwich the flat surface 20 of the flange portion 2 a and the pair of web portions 2 b in the material axis orthogonal direction X. The position and number of the members 5 to be installed are arbitrary.

  As shown in FIG. 9, the connecting member 5 includes a flat plate portion 51 using a steel plate or the like, and a connecting-side protrusion 50 protruding from the flat plate portion 51 in the material axis orthogonal direction X. Here, as for the connection member 5, the connection side protrusion part 50 extended continuously in the wall width direction Z is integrally formed with the flat plate part 51 by the rolling process of hot rolling or cold rolling. The connecting member 5 is formed by continuously extending the connecting side protrusion 50 in the wall width direction Z, and the connecting side protrusion 50 may be arranged in the material axis direction Y depending on the place where the connecting member 5 is installed. It may be formed extending continuously.

  The connecting member 5 is not limited to this, and the flat plate portion 51 and the connecting-side protruding portion 50 may be integrally formed by machining by using a thick steel plate as a cutting process or the like. In addition, the connecting member 5 is made of flat steel or the like as the connection-side protruding portion 50 and welds and joins the flat steel to the side surface of the steel plate used as the flat-plate portion 51. May be formed integrally.

  The connecting member 5 has, for example, a plate thickness dimension t in the material axis orthogonal direction X of the flat plate portion 51 of about 9 mm to 25 mm, a width dimension B in the wall width direction Z of about 50 mm to 125 mm, or about 200 mm to 400 mm. The height dimension H in the direction Y is about 200 mm to 400 mm. In addition, the connecting member 5 has a length L in the material axis direction Y of each connection side protrusion 50 of about 10 mm to 38 mm, and a height h in the material axis orthogonal direction X of about 4.5 mm to 19 mm. The distance D at which the protrusions 50 are separated from each other in the material axis direction Y is about 60 mm to 100 mm.

  In the connecting member 5, the flat plate portion 51 is formed continuously from one end portion 31 of the plurality of steel sheet piles 2 to the other end portion 32 in the material axis direction Y, and any one of the plurality of steel sheet piles 2 from the flat plate portion 51. The connecting side protrusion 50 is formed by projecting toward one or both ends 3. The connection member 5 is constructed along the flat surface 20 formed in each edge part 3 of the some steel sheet pile 2. As shown in FIG.

  The flat plate portion 51 is formed in a substantially rectangular shape, for example, as shown in FIG. As shown in FIGS. 9B and 9C, the flat plate portion 51 is penetrated in the material axis orthogonal direction X on each of the upper side and the lower side in the material axis direction Y to form bolt insertion holes 40. Is done. In the flat plate portion 51, one or a plurality of connection-side protrusions 50 are formed on the side surfaces facing the flat surface 20 of the end portion 3 of the steel sheet pile 2.

  The connection side projection 50 is locked in the material axis direction Y by the base material side projection 60 provided at one or both ends 3 of the plurality of steel sheet piles 2. The connection-side protrusion 50 is formed on each of the upper side and the lower side of the flat plate portion 51 in the material axis direction Y, and is provided on each of the one end 31 and the other end 32 of the plurality of steel sheet piles 2. The base material side protrusions 60 thus formed are locked with each other.

  The base material side protrusion 60 is formed, for example, by protruding from the plate member 6 of the steel sheet pile 2 in the material axis orthogonal direction X. The base material-side protruding portion 60 is formed by attaching a plate member 6 to one or both of the end portions 3 of the plurality of steel sheet piles 2 by welding or the like, and extending from the plate member 6 toward the flat plate portion 51 of the connecting member 5. It is formed to project in the direction perpendicular to the axis X. In the plate member 6, a base material side protrusion 60 that extends continuously in the wall width direction Z is integrally formed with the plate member 6 by hot rolling or cold rolling.

  The plate member 6 is not limited to this, and the plate member 6 and the base material side protrusion 60 may be integrally formed by machining by using a thick steel plate as a cutting process or the like. Further, the plate member 6 is made of flat steel or the like as the base material side protrusion 60, and the flat member is welded and joined to the side surface of the steel plate used as the plate member 6, so that the plate member 6 and the base material side protrusion are formed. 60 may be integrally formed.

  Although the base material side protrusion part 60 is provided by attaching the plate member 6 to the end part 3 of the steel sheet pile 2, the base material side protrusion part is not limited to this, and as shown in FIG. A flat steel or the like used as 60 may be attached to the end 3 of the steel sheet pile 2 by direct welding or the like.

  As shown in FIG. 10 (b), the base material side protrusion 60 may be provided only on one end 31 of the plurality of steel sheet piles 2. At this time, on the other end 32 side of the plurality of steel sheet piles 2, the connection side protrusion 50 is not formed on the flat plate portion 51 of the connection member 5, and the other end 32 where the base material side protrusion 60 is not provided. The flat plate portion 51 of the connecting member 5 is attached by direct welding or the like.

  As shown in FIGS. 9 and 10, the connecting member 5 is in the material axis orthogonal direction X from the flat plate portion 51 to the end portion 3 of the steel sheet pile 2 at one or both end portions 3 of the plurality of steel sheet piles 2. Bolts are joined by the bolts 4 penetrated. The connecting member 5 is fixed to the end portion 3 of the steel sheet pile 2 by screwing the fastening nut 41 into the bolt 4 on the back surface of the end portion 3 of the steel sheet pile 2.

  The connection side protrusion 50 and the base material side protrusion 60 are formed in a substantially rectangular cross section. Even when the connection side protrusion 50 and the base material side protrusion 60 are formed by hot rolling or cold rolling, etc., as shown in FIG. Moreover, as shown in FIG. 12, it may be formed in a substantially T-shaped cross section.

  As shown in FIGS. 11 and 12, the connection-side protrusion 50 and the base-material-side protrusion 60 receive the tensile force T in the direction in which the steel sheet piles 2 are separated from each other in the material axis direction Y. The one end surface in the material axis direction Y of the projection 50 and the one end surface in the material axis direction Y of the base material side projection 60 are in contact with each other.

  The connection-side protruding portion 50 and the base material-side protruding portion 60 form the contact surface 30 by contacting each one end surface facing each other in the material axis direction Y. The connection-side projection 50 and the base-material-side projection 60 have a plurality of steels in which one end surfaces of the connection-side projection 50 and the base material-side projection 60 are engaged with each other in the material axis direction Y by the contact surface 30 and resist the tensile force T. The sheet piles 2 are restrained so as not to be separated from each other in the material axis direction Y.

  As shown in FIGS. 9 and 10, the connection-side protruding portion 50 and the base-material-side protruding portion 60 are formed so as to have a substantially rectangular cross section, thereby being connected substantially orthogonally to the side surface of the flat plate portion 51 of the connecting member 5. The contact surface 30 of the side projection 50 is formed, and the contact surface 30 of the base material projection 60 is formed substantially orthogonal to the flat surface 20 of the end 3 of the steel sheet pile 2 or the side surface of the plate member 6. Is done.

  As shown in FIG. 11, the connection-side protruding portion 50 and the base material-side protruding portion 60 are formed in a substantially trapezoidal cross section so that they taper toward the end portion 3 of the steel sheet pile 2 in the material axis orthogonal direction X. A connection-side protrusion 50 inclined in a shape is formed, and a base material-side protrusion 60 inclined in a taper shape in the material axis orthogonal direction X is formed toward the flat plate portion 51 of the connection member 5.

  The connection side projection 50 widens the distal end side 50 a that protrudes toward the end portion 3 of the steel sheet pile 2 in the material axis direction Y than the proximal end side 50 b that is connected to the flat plate portion 51 of the connection member 5. Inclined like a taper. Moreover, the base material side protrusion part 60 is the base end side connected to the flat surface 20 or the plate member 6 of the end part 3 of the steel sheet pile 2 with the front end side 60a protruded toward the flat plate part 51 of the connecting member 5. The taper is inclined so as to be wider in the material axis direction Y than 60b.

  The connection-side protruding portion 50 and the base material-side protruding portion 60 are brought into contact with each other at a contact surface 30 that is inclined in a taper shape in the direction orthogonal to the material axis X by forming one end surfaces thereof substantially parallel to each other. The The connection side protrusion 50 and the base material side protrusion 60 are inclined in a tapered shape so that the tip side 50a of the connection side protrusion 50 is widened, and the tip side 60a of the base material side protrusion 60 is widened. In this way, the contact surfaces 30 are locked so as not to be separated from each other in the material axis orthogonal direction X. The “tapered shape” refers to a shape in which each side surface of the connection side protrusion 50 and the base material side protrusion 60 is inclined in the material axis orthogonal direction X, and the front end side 50 a and the base material side of the connection side protrusion 50. In addition to the case where the distal end side 60a of the protrusion 60 is widened in the material axis direction Y, the connection side protrusion 50 and the base material side protrusion 60 are not widened in the material axis direction Y and have a substantially uniform width. And

  As shown in FIG. 12, the connection-side protrusion 50 and the base-material-side protrusion 60 are formed in a substantially T shape in cross section, and are extended in the material axis direction Y at the distal end side 50 a of the connection-side protrusion 50. The connection side extending portion 52 is formed, and the base material side extending portion 62 is formed by extending in the material axis direction Y at the distal end side 60 a of the base material side protruding portion 60.

  The connection-side protrusion 50 and the base-material-side protrusion 60 have a contact surface in which the base end side 50b of the connection-side protrusion 50 and the base-material-side extending portion 62 of the base-material-side protrusion 60 are formed substantially parallel to each other. 30 abuts. The connection-side protrusion 50 and the base-material-side protrusion 60 are formed so that the connection-side extending portion 52 of the connection-side protrusion 50 and the base end side 60b of the base-material-side protrusion 60 are formed substantially parallel to each other. Is abutted.

  The connection-side protrusion 50 and the base-material-side protrusion 60 are composed of a connection-side extension 52 on the tip-side 50 a of the connection-side protrusion 50 and a base-side extension 62 on the tip-side 60 a of the base-side protrusion 60. By being extended in the material axis direction Y, they are locked so as not to be separated from each other in the material axis orthogonal direction X.

  The connection-side protrusion 50 and the base-material-side protrusion 60 are formed with a connection-side protrusion 50 that is inclined in a tapered shape, and a base-material-side protrusion 60 that is inclined in a tapered shape. A connection side extending portion 52 on the distal end side 50 a of the connection side protruding portion 50 and a base material side extending portion 62 on the distal end side 60 a of the base material side protruding portion 60 may be formed.

  The steel member cascade structure 1 to which the present invention is applied has a plurality of connection-side protrusions 50 to be engaged with the plurality of base-material-side protrusions 60, and as shown in FIG. It is desirable that the portion 50 and the base material side protrusion 60 are formed to be inclined in a tapered shape. The steel member cascade structure 1 to which the present invention is applied has one end surface 53 in the material axis direction Y of the connection side protrusion 50, and the R portion 30 a is provided at the distal end side 50 a and the proximal end side 50 b of the connection side protrusion 50. In addition to being formed, the R portion 30a is formed on the front end side 60a and the base end side 60b of the base material side projection portion 60 on one end face 63 in the material axis direction Y of the base material side projection portion 60. Extrusion improves workability.

  In the steel member cascade structure 1 to which the present invention is applied, in each of the portions other than the R portion 30a, in particular, as shown in FIG. Are formed in a tapered shape so as to be substantially parallel to each other, and the one end surfaces 63 of the respective base material side projections 60 facing each other in the material axis direction Y are substantially parallel to each other. By forming the taper shape, the one end surface 53 of the connection-side protrusion 50 and the base material side facing each other in the material axis direction Y in a state where the connection-side protrusion 50 is locked to the base material-side protrusion 60. The one end face 63 of the protrusion 60 is formed so as to be substantially parallel to each other, and the workability can be further improved.

  Here, the steel member cascade 1 to which the present invention is applied has a compressive force acting in a direction in which the steel sheet piles 2 approach each other in the material axis direction Y, or a plurality of steel sheet piles 2 with a material shaft. A tensile force acts in the direction of separating in the direction Y. At this time, in the steel member cascade structure 1 to which the present invention is applied, when the tensile force T acts on the plurality of steel sheet piles 2, from the contact surface 30 of the connection-side protrusion 50 to the center of gravity of the flat plate portion 51. Since there is a distance in the direction orthogonal to the material axis X, the bending bending acts on the connecting member 5 to cause warping deformation, and the connecting member 5 may be detached.

  Therefore, in the steel member cascade structure 1 to which the present invention is applied, as shown in FIG. 14A, the fixing member 7 has both end surfaces (one end surface 5a, the other end surface) in the material axis direction Y of the connecting member 5. 5b). As a result, the steel member cascade 1 to which the present invention is applied is a case where the eccentric bending acts on the connection-side protrusion 50 formed on the most end surface 5a side and the other end surface 5b side in the material axis direction Y. Even if it exists, it becomes possible to prevent detachment | leave of the connection member 5 because the connection member 5 is latched by the fixing member 7, and curvature deformation is suppressed.

  The fixing member 7 is provided in contact with both end surfaces 5a and 5b of the connecting member 5 in the material axis direction Y, for example. In this case, the connecting member 5 easily realizes suppression of warp deformation in the connecting member 5 by having both end surfaces 5a, 5b of the connecting member 5 in the material axis direction Y restrained by the fixing member 7. be able to.

  The fixing member 7 is provided so as to surround the connecting member 5. The fixing member 7 is provided in contact with or adjacent to both side surfaces (one side surface 5c, the other side surface 5d) of the connecting member 5 in the wall width direction Z. At this time, the connecting member 5 is in a state in which both side surfaces 5c and 5d in the wall width direction Z of the connecting member 5 are constrained by the fixing member 7 or are spaced apart. For this reason, the fixing member 7 restrains the movement of the connecting member 5 in the wall width direction Z or suppresses the movement beyond a certain level.

  For example, when the width dimension in the wall width direction Z of the connection side protrusion 50 and the base material side protrusion 60 is different, the fixing member 7 has a side surface in the connection side protrusion 50 having a large width in the wall width direction Z or It is provided in contact with the side surface of the base material side protrusion 60. Also in this case, the connecting member 5 is in a state where both side surfaces 5c and 5d in the wall width direction Z of the connecting member 5 are constrained by the fixing member 7 or are spaced apart. For this reason, the fixing member 7 restrains the movement of the connecting member 5 in the wall width direction Z or suppresses the movement beyond a certain level.

  For example, the fixing member 7 may be provided in contact with both end surfaces 5a and 5b in the material axis direction Y and both side surfaces 5c and 5d in the wall width direction Z of the connecting member 5. In this case, the connecting member 5 is in a state in which both end faces 5a and 5b in the material axis direction Y and both side surfaces 5c and 5d in the wall width direction Z of the connecting member 5 are constrained by the fixing member 7. It is possible to easily realize the restraint of the warp deformation in 5 and the restraint of the movement in the wall width direction Z.

  As shown in FIG. 14B, the fixing member 7 includes a pair of flat plate members 71 provided opposite to each other, and between the one end portions 71 a and between the other end portions 71 b of the pair of flat plate members 71. A pair of shaft members 72 that are installed opposite to each other are mainly used. As shown in FIG. 15A, the fixing member 7 includes a pair of flat plate members 71 sandwiching the connecting member 5 in the material axis direction Y, and the pair of shaft members 72 connecting the connecting member 5 in the wall width direction Z. In addition to being provided, for example, as shown in FIG. 15B, a pair of shaft members 72 are provided with the connecting member 5 sandwiched in the material axis direction Y, and a pair of flat plate members 71 connect the connecting member 5 in the wall width direction. Z is provided between Z. That is, the direction of the fixing member 7 illustrated in FIG. 14B is an example, and the direction in which the fixing member 7 is installed is arbitrary.

  Note that, for example, as shown in FIG. 15C, the fixing member 7 may have an extending portion 71 s that protrudes from the flat plate member 71 in the material axis orthogonal direction X and extends in the material axis direction Y. The extending portions 71 s protrude for each flat plate member 71 and are formed so as to face each other in the material axis direction Y, or may be formed integrally with the pair of flat plate members 71. At this time, the connecting member 5 is constrained or separated between the extending portion 71s and the plate member 6 in the material axis orthogonal direction X or between the extending portion 71s and the steel sheet pile 2 in the material axis orthogonal direction X. And become sandwiched. Thereby, it becomes possible to suppress the warp deformation (the deformation in the out-of-plane direction of the connecting member 5) in the material axis orthogonal direction X of the connecting member 5.

  In addition to the above, when the fixing member 7 is provided with a pair of flat plate members 71 sandwiching the connecting member 5 in the wall width direction Z, for example, as shown in FIG. May be formed so as to protrude in the material axis orthogonal direction X and extend in the wall width direction Z. Even in this case, the connecting member 5 is constrained between the material axis orthogonal direction X between the extending portion 71s and the plate member 6 or between the material axis orthogonal direction X between the extending portion 71s and the steel sheet pile 2. Or it will be in the state pinched apart. Thereby, it becomes possible to suppress the warp deformation of the connecting member 5 in the material axis orthogonal direction X.

  For the fixing member 7, a steel plate or the like is used as the flat plate member 71, and a bolt and a nut or the like are used as the shaft member 72. For example, a pair of bolts are installed on a pair of steel plates, and a nut is screwed onto each bolt. The connecting member 5 can be sandwiched between a pair of steel plates and a pair of bolts. At this time, the degree to which the steel plate restrains the connecting member 5 can be controlled by the strength with which the nut is screwed, and the bolt is connected to the connecting member 5 depending on the installation position of the bolt, such as the bolt coming into contact with the connecting member 5. It is possible to control whether or not to restrain. The flat plate member 71 and the shaft member 72 can be attached after the connecting member 5 is installed on the steel sheet pile 2, and no prior processing is required for the attachment.

  For example, as shown in FIG. 16, the fixing member 7 protrudes in the material axis direction Y from the flat plate member 71, or between the connection side protrusion 50 and the steel sheet pile 2, or between the connection side protrusions. You may have the flat projection part 71t interposed between the material axis orthogonal directions X of the part 50 and the board member 6. FIG. The flat plate protrusion 71t is formed for each flat plate member 71. At this time, the connection-side protrusion 50 formed on the most end surface 5a side and the other end surface 5b side in the material axis direction Y is in a state of being locked by the flat plate member 71 and the flat plate protrusion 71t. Thereby, it becomes possible to suppress the warp deformation of the connecting member 5 in the material axis orthogonal direction X.

  For example, as shown in FIG. 17, the fixing member 7 has a bent portion 71d between the extending portion 71c and the one end portion 71a of the flat plate member 71 and between the extending portion 71c and the other end portion 71b. May be. The bent portion 71d is formed so as to be substantially orthogonal to the extending portion 71c, the one end portion 71a, and the other end portion 71b, and is formed so as to be substantially parallel to the shaft member 72. In this case, the fixing member 7 includes the extending portion 71c of the pair of flat plate members 71 or the bent portion 71d of the pair of flat plate members 71 and the pair of shaft members 72, and the connecting member 5 in the material axial direction. The other is provided with the connecting member 5 sandwiched in the wall width direction Z. Also in this case, the direction of the fixing member 7 shown in FIG. 17B is an example, and the direction in which the fixing member 7 is installed is arbitrary.

  Note that the fixing member 7 may have a plate-like lid portion 71u formed integrally with the extending portion 71c and the bent portion 71d of the flat plate member 71, for example, as shown in FIG. In addition to being formed for each flat plate member 71, the lid portion 71u is formed integrally with, for example, one of the extended portions 71c and the bent portion 71d of the pair of flat plate members 71, and the other extended portion 71c and the bent portion. You may extend | stretch to the position adjacent to the part 71d. When this flat plate member 71 is attached to the connecting member 5, the connecting member 5 is between the material axis orthogonal direction X of the lid portion 71 u and the plate member 6 or the material axis orthogonal direction of the lid portion 71 u and the steel sheet pile 2. It will be in the state restrained between X or the state pinched apart. Thereby, it becomes possible to suppress the warp deformation of the connecting member 5 in the material axis orthogonal direction X.

  For example, as shown in FIG. 18, the fixing member 7 includes one flat plate member 71 integrally formed with each one end portion 71 a of a pair of flat plate members 71 provided facing each other, and each of the pair of flat plate members 71. A shaft member 72 provided between the other end portion 71b and provided to face one flat plate member 71 may be used. The fixing member 7 is provided with either one of the pair of flat plate members 71 or one flat plate member 71 and the shaft member 72 with the connecting member 5 sandwiched in the material axis direction Y, and either one of them is the connecting member. 5 is provided in the wall width direction Z. Also in this case, the direction of the fixing member 7 shown in FIG. 18B is an example, and the direction in which the fixing member 7 is installed is arbitrary.

  Note that the fixing member 7 may include a pair of flat plate members 71 and a plate-like lid portion 71u formed integrally with the single flat plate member 71 as shown in FIG. 18C, for example. When this flat plate member 71 is attached to the connecting member 5, the connecting member 5 is between the material axis orthogonal direction X of the lid portion 71 u and the plate member 6 or the material axis orthogonal direction of the lid portion 71 u and the steel sheet pile 2. It will be in the state restrained between X or the state pinched apart. Thereby, it becomes possible to suppress the warp deformation of the connecting member 5 in the material axis orthogonal direction X.

  For example, as shown in FIG. 19, the fixing member 7 uses a wire rod 73 that is integrally provided so as to surround the connection-side protruding portion 50 and the base material-side protruding portion 60 that are locked together in the material axis direction Y. The wire 73 is provided in contact with both end faces 5a and 5b of the connecting member 5 in the material axis direction Y and both side faces 5c and 5d of the wall width direction Z. At this time, the connecting member 5 is in a state in which both end surfaces 5a and 5b in the material axis direction Y and both side surfaces 5c and 5d in the wall width direction Z of the connecting member 5 are constrained by the wire 73. It is possible to easily suppress the warp deformation and restrain the movement in the wall width direction Z.

For example, when the width dimension in the wall width direction Z of the connection side protrusion 50 and the base material side protrusion 60 is different, the wire 73 has a side surface or a base in the connection side protrusion 50 having a large width in the wall width direction Z. It is provided in contact with the side surface of the material side protrusion 60. In this case, the connecting member 5 is in a state in which both end faces 5a and 5b in the material axis direction Y of the connecting member 5 are constrained by the wire rod 73, and both side faces 5c and 5d of the connecting member 5 in the wall width direction Z are In this state, the wire 73 is constrained by the wire 73 or is sandwiched between the wires 73. Accordingly, it is possible to easily realize the warpage deformation of the connecting member 5 and to easily restrain the movement of the connecting member 5 in the wall width direction Z or the movement of a certain amount or more.

  The fixing member 7 uses a wire or the like as the wire rod 73, and forms a state in which the connecting member 5 is restrained by tightening the wire with a turnbuckle or the like, for example. At this time, the degree to which the wire restrains the connecting member 5 can be controlled by, for example, the degree of tightening of the turnbuckle. The wire rod 73 can be attached after the connecting member 5 is installed on the steel sheet pile 2, and prior processing associated with the attachment of the wire rod 73 is unnecessary.

  The steel member cascade 1 to which the present invention is applied, for example, as shown in FIG. 20, protrudes from the connecting member 5, the plate member 6, or the steel sheet pile 2 and extends in the material axial direction Y. And the fixing member 7 is between the material axis orthogonal direction X of the support unit 8 and the plate member 6 or between the material axis orthogonal direction X of the support unit 8 and the steel sheet pile 2. Be placed. In the steel member cascade structure 1 to which the present invention is applied, a pair of support portions 8 are formed so that the connecting member 5 is sandwiched in the material axis direction Y.

  As shown in FIG. 20A, the pair of support portions 8 includes a hook portion 81 that extends in the material axis direction Y from each of the one end surface 5 a and the other end surface 5 b of the connection member 5, and is integrated with the connection member 5. 20B, FIG. 20C, for example, one end face 5a of the connecting member 5 from the tip 8a protruding from the plate member 6 or the steel sheet pile 2 in the material axis orthogonal direction X. And the latching | locking part 81 extended in the material-axis direction Y to the position which touches each of the other end surface 5b or adjoins is formed. The pair of support portions 8 are formed, for example, by welding and joining the steel plates to the end faces 5a and 5b, the plate member 6 or the steel sheet pile 2 of the connecting member 5 or by cutting the connecting member 5 or the plate member 6. The

  The pair of support portions 8 extend in the material axis direction Y or are provided adjacent to the connecting member 5 to the extent that the fixing member 7 cannot move in the material axis orthogonal direction X. For this reason, the pair of support portions 8 restrains the movement of the fixing member 7 in the direction perpendicular to the material axis X and can prevent the fixing member 7 from coming off the connecting member 5.

  The support portion 8 is provided as a pair, and for example, a frame-like member fixed to the connecting member 5 in contact with both end surfaces 5a and 5b and both side surfaces 5c and 5d of the connecting member 5 is a hooking portion 81. May be used as Also in this case, the fixing member 7 is disposed between the material axis orthogonal direction X of the support part 8 and the plate member 6 or between the material axis orthogonal direction X of the support part 8 and the steel sheet pile 2. For this reason, the support part 8 restrains the movement of the fixing member 7 in the direction perpendicular to the material axis X and can prevent the fixing member 7 from coming off from the connecting member 5.

  Here, in the steel member cascade 1 to which the present invention is applied, when the connection side protrusion 50 and the base material side protrusion 60 are formed in a substantially rectangular cross section, as shown in FIG. The member 5 is moved in the material axis orthogonal direction X from the region outside the groove portion S of the steel sheet pile 2, that is, from the region separated from the groove portion S with the steel sheet pile 2 as a boundary in the material axis orthogonal direction X. At this time, the connecting member 5 is attached to the steel sheet pile 2 from the region outside the groove S and is fixed with the bolts 4 or the like. In addition, the connection member 5 is moved from the area | region inside the groove part S of the steel sheet pile 2, ie, the area | region containing the groove part S by making the steel sheet pile 2 into a boundary in the material axis orthogonal direction X, and the steel sheet pile 2 in the groove part S inside. It may be attached from the area.

  The steel member cascade structure 1 to which the present invention is applied is shown in FIG. 22 when the connecting side protrusion 50 and the base material side protrusion 60 are formed in a substantially trapezoidal cross section or a substantially T cross section. Then, the connecting member 5 is slid in the wall width direction Z. At this time, in the connection member 5, the connection side protrusion 50 is slid between the plurality of base material side protrusions 60, and the base material side protrusion 60 is slid between the plurality of connection side protrusions 50. It is inserted and fixed so as not to be separated in the material axis orthogonal direction X.

  As shown in FIGS. 23 (a) and 23 (b), the steel member cascade structure 1 to which the present invention is applied includes a plate member 6 and a connecting member 5 on which a base material side protrusion 60 is formed. It may be manufactured by cutting or the like along a cutting line E inclined in the material axis direction Y or the like. At this time, in the steel member cascade structure 1 to which the present invention is applied, as shown in FIG. 23 (c), the base material side projection 60 and the connection side projection 50 are inclined in the wall width direction Z. By forming and sliding the connecting member 5 in the wall width direction Z, the plurality of connecting side protrusions 50 are slid and inserted between the plurality of base material side protruding parts 60.

  The steel member cascade structure 1 to which the present invention is applied is provided with a locking member 33 at one end in the wall width direction Z as required, and the connecting member 5 is slid in the wall width direction Z. Sometimes, the connecting member 5 is locked to the locking member 33. At this time, in the steel member cascade 1 to which the present invention is applied, the base member side protrusion 60 and the connection side protrusion 50 are inclined so that the connecting member 5 can be easily slid and connected. By being locked by the locking member 33, the connecting member 5 can be prevented from sliding more than necessary, and the connecting member 5 can be prevented from falling off.

  In the steel member cascade structure 1 to which the present invention is applied, the fixing member 7 is provided with the connecting member 5 sandwiched in the material axis direction Y. For this reason, even when an eccentric bending acts on the connecting member 5, the connecting member 5 is locked by the fixing member 7, and the warpage deformation is suppressed, thereby preventing the connecting member 5 from being detached. It becomes possible.

  The steel member cascade structure 1 to which the present invention is applied is a state in which both end surfaces 5 a and 5 b in the material axis direction Y and both side surfaces 5 c and 5 d in the wall width direction Z of the connecting member 5 are restrained by the fixing member 7. Therefore, the movement of the connecting member 5 in the wall width direction Z is restricted, and the connecting member 5 can be prevented from falling off.

  The steel member cascade structure 1 to which the present invention is applied uses the flat plate member 71 and the shaft member 72 or the wire rod 73 as the fixing member 7, so that prior processing associated with the attachment of the fixing member 7 is unnecessary. It becomes possible to improve workability and reduce processing costs.

  In the steel member cascade structure 1 to which the present invention is applied, the fixing member 7 is disposed between the support portion 8 and the plate member 6 or the steel sheet pile 2 in the material axis orthogonal direction X. Can be prevented from deviating in the material axis orthogonal direction X, and warping deformation of the connecting member 5 can be reliably suppressed.

  The steel member cascade 1 to which the present invention is applied has a base-side protrusion even when the connection-side protrusion 50 and the base-material-side protrusion 60 are formed in a substantially trapezoidal cross-section or a substantially T-shaped cross-section. The connecting member 5 is fixed so as not to be separated in the material axis orthogonal direction X by the portion 60, and the fixing member 7 restricts the movement of the connecting member 5 in the wall width direction Z or suppresses the movement of a certain level or more. The member 5 is locked in the material axis direction Y. At this time, the steel member cascade structure 1 to which the present invention is applied prevents the connecting member 5 from falling off without using the bolt 4 that penetrates the end portion 3 of the steel sheet pile 2 in the material axis orthogonal direction X. As a result, it is possible to improve the water stop performance of the steel sheet pile 2 by not forming an opening in the end portion 3 of the steel sheet pile 2.

  As shown in FIG. 24, the steel member cascade structure 1 to which the present invention is applied particularly embeds a plurality of steel sheet piles 2 connected by a connecting member 5 in the ground 99, or a plurality of steels. In the state where the sheet pile 2 is embedded in the ground 99, the bending load M acts on the place where the plurality of steel sheet piles 2 are connected.

  The steel member cascade structure 1 to which the present invention is applied can sufficiently resist the bending load M at a location where a plurality of steel sheet piles 2 are connected. It is desirable that the steel sheet pile 2 be the same level as the single sheet pile. At this time, in the steel member cascade 1 to which the present invention is applied, for example, the connecting member 5 is installed on the flange portion 2a and the arm portion 2c, so that the connecting member 5 is connected to the bending shaft M from the neutral axis C. The distances e1 and e2 to the center of gravity are substantially the same as the distances from the neutral axis C to the flange portion 2a and the arm portion 2c of the steel sheet pile 2.

  In the steel member cascade structure 1 to which the present invention is applied, the distances e1 and e2 from the neutral axis C of the bending load M to the center of gravity of the connecting member 5 are substantially the same as the flange portion 2a and the arm portion 2c of the steel sheet pile 2. Therefore, when the connecting member 5 having the same cross-sectional area as that of the steel sheet pile 2 is installed, the bending rigidity and the bending strength of the connecting member 5 can be made the same as those of the steel sheet pile 2 alone. The steel member cascade structure 1 to which the present invention is applied can sufficiently resist the bending load M at a portion where a plurality of steel sheet piles 2 are connected even with a connection member 5 having a thin plate thickness similar to that of the steel sheet pile 2. Therefore, the connecting member 5 can be made lightweight and compact.

  In the steel member cascade structure 1 to which the present invention is applied, in particular, the connecting member 5 is installed at a position separated from the neutral axis C of the bending load M, and the cross-sectional secondary moment of the connecting member 5 is increased. Even if the plate thickness of the connecting member 5 is made thinner, the bending load M can be sufficiently resisted at the place where the plurality of steel sheet piles 2 are connected. As a result, the steel member cascade structure 1 to which the present invention is applied can secure sufficient bending rigidity at a location where a plurality of steel sheet piles 2 are connected, and at the same time, the connecting member 5 is lightweight and compact. By doing, it becomes possible to suppress the connection cost of several steel members.

  Since the cascade structure 1 of steel members to which the present invention is applied can secure sufficient bending rigidity at a location where a plurality of steel sheet piles 2 are connected, a location where the plurality of steel sheet piles 2 are connected is a structural weakness. Therefore, it is possible to avoid a decrease in the bending performance of the entire connected steel member 90 in which a plurality of steel members are connected in the material axis direction Y.

  In addition, when the action direction of the bending load M is specified, the cascade structure 1 of steel members to which the present invention is applied is provided only on the flat surface 20 of the flange portion 2a on the tension side, as shown in FIG. By installing the connecting member 5, the amount of steel used as the connecting member 5 can be suppressed. As shown in FIG. 4, when the U-shaped steel sheet pile 22 is used, the steel member cascade structure 1 to which the present invention is applied is alternately reversed and connected. The bending strength can be improved by increasing the thickness of the connecting member 5 at the flange portion 2a of the U-shaped steel sheet pile 22 on the side.

  As shown in FIGS. 11 to 13, the steel member cascade 1 to which the present invention is applied has a plurality of steel sheet piles 2 connected in the material axial direction Y in the material axial direction Y at the contact surface 30. By being locked, the tensile force T is resisted. Since the bearing strength of the connection side projection 50 and the base material side projection 60 required to resist the tensile force T is generally about 1.5 times higher than the tensile strength, the thickness of the steel sheet pile 2 is By reducing the height h in the material axis orthogonal direction X of the connecting side protrusion 50 and the base material side protrusion 60 to the dimension t ′ to about 70% (h = 1 / 1.5 × t ′). The connecting member 5 can be made lighter and more compact.

  Here, the steel member cascade structure 1 to which the present invention is applied is used to connect a plurality of steel members having a predetermined cross-sectional shape in the material axis direction Y, and is shown in FIGS. As shown, it is mainly used for connecting a plurality of steel sheet piles 2 with connecting members 5.

  The steel member cascade structure 1 to which the present invention is applied is not limited to this, the H-section steel 24 having a substantially H-shaped cross section shown in FIG. 25A, and the square shape having a substantially rectangular cross-section shown in FIG. The steel pipe 25 or the circular steel pipe 26 having a substantially circular cross section shown in FIG. 25C may be used to connect the connecting members 5 as a plurality of steel members.

  The steel member cascade 1 to which the present invention is applied is shown in FIG. 6 and FIG. 25 (a), when the connecting member 5 is installed on the steel sheet pile 2 or the web portion 2 b of the H-shaped steel 24. In particular, the connection-side protrusion 50 of the connection member 5 may be arranged in a state of continuously extending in the material axis direction Y. At this time, in the steel member cascade structure 1 to which the present invention is applied, the connection-side protrusion 50 extending in the material axis direction Y is effective against the shearing force acting on the steel sheet pile 2 or the H-shaped steel 24. It will resist.

  As mentioned above, although the example of embodiment of this invention was demonstrated in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and these are the technical aspects of this invention. The range should not be interpreted in a limited way.

1: Longitudinal structure of steel sheet pile 2: Steel sheet pile 2a: Flange portion 2b: Web portion 2c: Arm portion 2d: Joint portion 20: Flat surface 21: Hat-shaped steel sheet pile 22: U-shaped steel sheet pile 23: Z-shaped steel sheet pile 24: H-shaped steel 25: Square steel pipe 26: Circular steel pipe 3: End 30: Contact surface 30a: R part 31: One end 32: Other end 33: Locking member 4: Bolt 40: Bolt insertion Hole 41: Fastening nut 5: Connecting member 5a: One end surface 5b: The other end surface 5c: One side surface 5d: The other side surface 50: The connecting side protrusion 50a: The leading end side 50b of the connecting side protrusion: The proximal end side of the connecting side protrusion 51: flat plate portion 52: connecting side extending portion 53: one end face 6 of connecting side extending portion 6: plate member 60: base material side protruding portion 60a: distal end side 60b of base material side protruding portion: base end of base material side protruding portion Side 62: Base material side extending portion 63: One end surface of base material side protruding portion 7: Fixed portion Material 71: Flat plate member 71a: One end portion 71b: Other end portion 71c: Extension portion 71d: Bending portion 71s: Extension portion 71t: Flat plate projection 71u: Lid portion 72: Shaft member 73: Wire material 8: Support portion 8a: Tip 81: Hook 9: Steel wall 90: Connected steel member 99: Ground X: Material axis orthogonal direction Y: Material axis direction Z: Wall width direction

Claims (12)

A steel member cascade structure for connecting a plurality of steel members having a predetermined cross-sectional shape in the material axis direction,
A connecting member erected at each of the ends in the material axis direction facing each other by a plurality of steel members, and a fixing member provided with the connecting member sandwiched in the material axis direction
The connecting member includes a flat plate portion that is continuous in the material axis direction from one end portion of the plurality of steel members to the other end portion, and one or both of the plurality of steel members from the flat plate portion. A base-side protrusion that protrudes from one or both of the plurality of steel members toward the flat plate portion, the connection-side protrusion protruding toward the end. A steel member cascade structure characterized by being provided at the end portion of the steel member, and the connecting-side protrusion portion being locked to the base-material-side protrusion portion in the material axis direction. The fixing member is provided to surround the connecting member,
The longitudinal connection of the steel member according to claim 1, wherein the connecting member is in a state in which both end surfaces in the material axis direction and both side surfaces in the wall width direction of the connecting member are constrained by the fixing member. Construction. The fixing member includes a pair of flat plate members provided to face each other, and a pair of shaft members provided between the one end portions and the other end portions of the pair of flat plate members to face each other. And are used,
Either one of the pair of flat plate members or the pair of shaft members is provided with the connecting member sandwiched in the material axis direction, and either one is provided with the connecting member sandwiched in the wall width direction. The longitudinal connection structure of the steel member of Claim 1 or 2 characterized by these. The fixing member is installed between one flat plate member formed integrally with each one end portion of a pair of flat plate members provided opposite to each other and each other end portion of the pair of flat plate members. A shaft member provided opposite to the flat plate member is used,
Either one of the pair of flat plate members or the one flat plate member and the shaft member is provided with the connecting member sandwiched in the material axis direction, and either of the pair of flat plate members extends in the wall width direction. The cascade structure for steel members according to claim 1, wherein the steel member is provided on both sides. 3. The wire used as the fixing member is an integrally provided wire that surrounds the connection-side protruding portion and the base-material-side protruding portion that are locked to each other in a material axis direction. Cascade structure of steel members. The base material side protruding portion is formed by attaching a plate member to one or both of the end portions of a plurality of steel members and projecting from the plate member toward the flat plate portion. A cascade structure of steel members according to any one of claims 1 to 5. The fixing member protrudes from the connecting member, the plate member, or the steel member, and between the support portion having a latching portion extending in the material axis direction and the material axis orthogonal direction of the plate member or the steel member. It is arrange | positioned. The cascade structure of the steel members of any one of Claims 1-6 characterized by the above-mentioned. The connecting member is configured such that the connecting-side protruding portion inclined in a tapered shape toward the end portion of the steel member is brought into contact with the base material-side protruding portion inclined in a tapered shape toward the flat plate portion. The steel member longitudinal connection structure according to any one of claims 1 to 7, wherein the base member side protruding portion is locked in a direction perpendicular to the material axis. The connection member includes a plurality of connection-side protrusions that are engaged with the plurality of base-material-side protrusions, and one end surfaces of the connection-side protrusions facing each other in the material axis direction are mutually connected. One end surface of the connection-side protrusions facing each other in the material axis direction and the base material in a state where the connection-side protrusions are locked to the base material-side protrusions, and formed so as to be substantially parallel to each other The steel member cascade structure according to claim 8, wherein the side projections are formed so that one end surfaces in the material axis direction are substantially parallel to each other. The connecting member is formed with a connecting side extending portion extending in the material axis direction at the distal end side of the connecting side protruding portion protruding toward the end portion of the steel member, toward the flat plate portion. The connecting side extending portion is locked in the direction orthogonal to the material axis by a base material side extending portion formed by extending in the material axis direction on the tip end side of the protruding base material side protruding portion. The steel member cascade structure according to any one of claims 1 to 9. The connecting member includes one or both of a plurality of steel members, and a bolt that is penetrated from the flat plate portion to the end portion is screwed into a fastening nut that is tightened in a direction perpendicular to the material axis. The cascade structure of steel members according to any one of claims 1 to 10, wherein: As for a plurality of steel members connected in the material axis direction, a steel sheet pile is used as each steel member, and the connection member is installed on a flat surface formed in a substantially flat shape of the steel sheet pile. The steel member cascade structure according to any one of claims 1 to 11.

Images