TWI610009B - Vertically connecting structure of hat-type steel sheet-pile, vertically connected hat-type steel sheet-pile unit, and steel wall - Google Patents

Abstract

The longitudinal connection structure of the cap-shaped steel sheet pile is a longitudinal connection structure of the cap-shaped steel sheet pile which connects the first cap-shaped steel sheet pile and the second cap-shaped steel sheet pile with their end faces in the material axis direction facing each other. The longitudinal connection structure of the hat-shaped steel sheet pile includes: a first locked portion protruding outward from a side surface of the first hat-shaped steel sheet pile; and a mounting portion provided on a side of the second hat-shaped steel sheet pile, and The material axis direction is locked at the first locked portion of the first cap-shaped steel sheet pile.

Description

Vertical connection structure of hat-shaped steel sheet pile, longitudinal connection of hat-shaped steel sheet pile unit, and steel wall

FIELD OF THE INVENTION The present invention relates to a longitudinal connection structure of a hat-shaped steel sheet pile connecting a plurality of hat-shaped steel sheet piles in a direction of a material axis, a longitudinal connection hat-shaped steel sheet pile unit having the longitudinal connection structure, and Structural wall with longitudinally connected cap-type steel sheet pile unit connection. The present invention claims priority based on Japanese Patent Application No. 2015-168456 filed in Japan on August 28, 2015, and Japanese Patent Application No. 2016-004004 filed in Japan on January 13, 2016. content. 〔Background technique〕

As a conventional method, a vertical connection structure of a hat-shaped steel sheet pile disclosed in Patent Document 1 is proposed as one that can ensure the water-tightness, rigidity, and strength of a longitudinal connection portion and can be easily and inexpensively constructed while reducing construction time and costs.

Patent Document 1 discloses a vertical connection structure in which a hat-shaped steel sheet pile having at least one web and a wing each and having a curved cross-sectional shape is connected upward and downward. This longitudinal connection structure includes a lower joint member, an upper joint member, and a fixing mechanism. The lower joint member is fixed at least two places where the web and the wing plate at the upper end portion of the lower cap-shaped steel sheet pile are different from each other, protruding from the surfaces of the web and the wing plate. The upper joint member is at least two webs and wings that are different from each other at a lower end portion of the upper side hat-shaped steel sheet pile corresponding to the lower joint member, and protrudes from the surfaces of the web and the wings to be fixed. The fixing mechanism fixes the lower joint member and the upper joint member in a state where the upper end edge of the lower cap steel sheet pile and the lower end edge of the upper cap steel sheet pile are in contact with each other.

[Leading technical literature]

[Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2011-38288

[Summary of Invention]

However, the longitudinal connection structure of the cap-shaped steel sheet pile disclosed in Patent Document 1 is because the cross-sectional performance of the steel plate serving as the lower joint member and the upper joint member is smaller than the cross-sectional performance of the cap-shaped steel sheet pile connected up and down, and therefore, The bending rigidity of the longitudinal connection portion where only the lower joint member and the upper joint member are arranged is reduced. Therefore, when the above-mentioned large bending load acts, the vertical connection part may become a structural weakness.

In addition, although there is a method of connecting a plurality of hat-shaped steel sheet piles by on-site welding, in the hat-shaped steel sheet piles that have been promoted in large sections in recent years, the cross-sectional area of each hat-shaped steel sheet pile is large and the amount of welding is increased. . Therefore, the welding time of each vertical connection part is long, especially if there are many vertical connection parts, the construction period will be longer.

In addition, even if a method of connecting a plurality of cap-shaped steel sheet piles by friction welding with high-strength bolts is used, the shear strength of each high-strength bolt is so high. With the same degree of joint strength in cross-section performance, most high-strength bolts are required. Therefore, the joint plate also becomes large, the processing cost increases, and the tightening of many high-strength bolts also lengthens the construction time and lengthens the construction period.

These problems, particularly compared with steel members such as H-beams or steel pipes, are significant in hat-shaped steel sheet piles with large dimensions in the wall width direction.

The present invention has been conceived in view of the above-mentioned problems, and an object thereof is to provide a vertical connection structure of a hat-shaped steel sheet pile which can ensure sufficient bending rigidity at a plurality of hat-shaped steel sheet piles connected to a direction of a material axis while suppressing connection costs. , Longitudinal connection cap steel sheet pile unit, and steel wall.

 The outline of this invention is as follows.

(1) A first aspect of the present invention is a longitudinal connection structure of a hat-shaped steel sheet pile that connects the first hat-shaped steel sheet pile and the second hat-shaped steel sheet pile with their end faces in the material axis direction facing each other. The longitudinal connection structure of the cap-shaped steel sheet pile includes: a first locked portion protruding outward from a side surface of the first cap-shaped steel sheet pile; and a mounting portion provided on a side of the second cap-shaped steel sheet pile, and The first to-be-locked portion of the first cap-shaped steel sheet pile is locked in the direction of the material axis. According to the longitudinal connection structure of the hat-shaped steel sheet pile according to the above aspect, since the mounting portion provided on the side of the second hat-shaped steel sheet pile is locked at the first locking portion protruding outward from the side of the first hat-shaped steel sheet pile, Therefore, the bending stress acting on the longitudinal connection of the hat-shaped steel sheet pile can be resisted by the erection portion, and the bending rigidity can be improved. In addition, in the case of vertical connection construction, the first locked portion of the first cap-shaped steel sheet pile is locked by the mounting portion provided on the second cap-shaped steel sheet pile. The cap-shaped steel sheet pile and the second cap-shaped steel sheet pile can be used for longitudinal connection construction without welding operations that require operation time and cost.

(2) In the vertical connection structure of the hat-shaped steel sheet pile described in the above (1), it may further include a second locked portion protruding outward from the side surface of the second hat-shaped steel sheet pile, and the aforementioned erection In addition to being locked to the first locked portion, the portion is also locked to the second locked portion. According to the vertical connection structure of the hat-shaped steel sheet pile according to the above aspect, during the longitudinal connection construction, the erected portion is also locked to the second locked portion of the second hat-shaped steel sheet pile. The one-hat steel sheet pile and the second-hat steel sheet pile can be used for longitudinal connection construction without the need for welding operations requiring working time and cost.

(3) In the longitudinal connection structure of the cap-shaped steel sheet pile described in the above (2), the end surface of the first cap-shaped steel sheet pile and the end surface of the first locked portion may be in the same plane, and the second The end surface of the hat-shaped steel sheet pile and the end surface of the second locked portion are in the same plane. According to the longitudinal connection structure of the cap-shaped steel sheet pile in the above aspect, not only the end faces of the first cap-shaped steel sheet pile and the second cap-shaped steel sheet pile, but also the two end surfaces of the first and second locked portions. Can also be opposite. Therefore, not only the end surface of the steel plate, but also the side surface of the locked portion can bear the pressure acting in the direction in which the first cap-shaped steel sheet pile and the second cap-shaped steel sheet pile approach each other in the direction of the material axis, so it can resist more Large bending load.

(4) In the vertical connection structure of the hat-shaped steel sheet pile described in any one of (1) to (3) above, the first locked portion may be extended at the front end side in the direction of the material axis. The extension is provided with a protrusion, and the erection portion has a structure of a recessed portion that extends in a wall width direction perpendicular to the direction of the material axis and the thickness direction of the first cap-shaped steel sheet pile, and is locked to the extension-protrusion. . According to the longitudinal connection structure of the hat-shaped steel sheet pile according to the aspect described above, the recessed portion that slides the extension protrusion of the first locked portion toward the mounting portion in the aforementioned wall width direction is used to make the first locked portion and the mounting portion mutually It is locked so that connection work can be performed easily. Further, since the erected portion can be prevented from falling off from the first to-be-engaged portion, the first cap-shaped steel sheet pile and the second cap-shaped steel sheet pile can be more reliably connected.

(5) In the longitudinal connection structure of the hat-shaped steel sheet pile described in the above (4), a structure further including a slip prevention portion may be adopted, and the slip prevention portion is used to restrain the installation portion and the first locked portion. Relative movement between the parts in the direction of the aforementioned wall width. According to the longitudinal connection structure of the hat-shaped steel sheet pile of the above aspect, the slip prevention portion prevents the erection portion and the first locked portion from moving relative to each other, thereby releasing the locked state between the two.

(6) In the vertical connection structure of the hat-shaped steel sheet pile described in any one of (1) to (5) above, the first locked portions may be spaced apart from each other along the direction of the material axis, and Set a plurality of constitutions. According to the longitudinal connection structure of the hat-shaped steel sheet pile of the above aspect, since the bending stress that each of the first locked portions can be reduced, the damage of the first locked portion can be prevented.

(7) In the vertical connection structure of the hat-shaped steel sheet pile according to the above (6), a configuration may be adopted in which the plurality of first locked portions are integrally provided on a common base material. According to the longitudinal connection structure of the hat-shaped steel sheet pile in the above aspect, the separation distance of the plurality of first locked portions spaced apart from each other in the direction of the material axis can be kept constant. Therefore, when a plurality of first locked portions are mounted on the first cap-shaped steel sheet pile, all the first locked portions can be accurately mounted in one step of fixing the base material to the first cap-shaped steel sheet pile. .

(8) In the vertical connection structure of the hat-shaped steel sheet pile described in any one of (1) to (7) above, the locking portion of the mounting portion except for the first locked portion may be adopted. The part of the part has the largest cross-sectional area when viewed from a cross-section perpendicular to the direction of the material axis, and has the largest position on the opposite surface of the first cap-shaped steel sheet pile and the second cap-shaped steel sheet pile. According to the longitudinal connection structure of the hat-shaped steel sheet pile of the above aspect, since the cross-sectional area of the erection portion where the bending rigidity is most required is large, the weight reduction of the erection portion and the bending rigidity can be ensured to coexist.

(9) A second aspect of the present invention is a longitudinally connected cap-shaped steel sheet pile unit having the longitudinal connection structure of the cap-shaped steel sheet pile described in any one of (1) to (8) above. According to the hat-shaped steel sheet pile of the above aspect, longitudinal connection construction can be performed without the need for welding operations requiring working time and cost.

(10) A third aspect of the present invention is a steel wall, which is such that the longitudinally connected steel sheet pile unit described in (9) above is perpendicular to the direction of the material axis and the thickness direction of the first hat-shaped steel sheet pile. A plurality of the mounting portions are provided continuously in the wall width direction, and the positions of the material axis direction are different from each other, and the respective mounting portions of the longitudinally connected cap-type steel sheet pile units adjacent to each other in the wall width direction are arranged. According to the longitudinal connection structure of the hat-shaped steel sheet pile in the above aspect, since the connection that can be a structural weakness can be avoided in the width direction of the wall, the entire wall body can ensure high bending rigidity.

According to the longitudinal connection structure of the hat-shaped steel sheet pile according to the aspect described in (1) above, the bending rigidity generated by the erected portion can be ensured, and the longitudinal connection construction can be performed without the need for welding operations of the conventional structure. Therefore, it is possible to ensure sufficient bending rigidity while suppressing the construction cost when a plurality of cap-shaped steel sheet piles are longitudinally connected in the direction of the axis of the material. According to the vertical connection structure of the hat-shaped steel sheet piles according to the aspect described in the above (2), it is possible to further suppress the construction cost when a plurality of hat-shaped steel sheet piles are longitudinally connected in the direction of the material axis. According to the vertical connection structure of the hat-shaped steel sheet pile according to the aspect described in (3) above, sufficient bending rigidity can be further ensured. According to the vertical connection structure of the hat-shaped steel sheet pile according to the aspect described in the above (4), the construction cost of the vertical connection construction can be further suppressed. According to the longitudinal connection structure of the hat-shaped steel sheet pile according to the aspect described in the above (5), since the locking state between the erected portion and the first locked portion can be prevented from being released, the connection state between the two can be made reliable and Sound state. According to the vertical connection structure of the hat-shaped steel sheet pile according to the aspect described in (6) above, since the first locked portion can be prevented from being damaged, the longitudinal directions of the first hat-shaped steel sheet pile and the second hat-shaped steel sheet pile can be further improved. Bending rigidity at the joint. According to the vertical connection structure of the hat-shaped steel sheet pile according to the aspect described in the above (7), all the first locked portions can be accurately installed in one step, so the construction cost can be further suppressed. According to the vertical connection structure of the hat-shaped steel sheet pile according to the aspect described in the above (8), since a lightweight and high bending rigidity erection portion can be used, vertical connection construction can be more easily performed. According to the vertical connection structure of the hat-shaped steel sheet pile according to the aspect described in the above (9), it is not necessary to perform a reliable vertical connection construction like the welding operation of the conventional structure. Therefore, it is possible to ensure sufficient rigidity while suppressing the construction cost when a plurality of cap-shaped steel sheet piles are longitudinally connected in the direction of the material axis. According to the longitudinal connection structure of the hat-shaped steel sheet pile according to the aspect described in the above (10), high bending rigidity can be ensured for the entire wall.

Hereinafter, a longitudinal connection structure 1 (hereinafter, simply referred to as a vertical connection structure 1) of a hat-shaped steel sheet pile according to an embodiment of the present invention will be described in detail with reference to the drawings.

As shown in FIG. 1, the longitudinal connection structure 1 is used in a place such as a narrow place where a long hat-shaped steel sheet pile cannot be constructed, and is used to be buried below and above the site 8 in the material axis direction Y. A plurality of cap-shaped steel sheet piles 2 (a first cap-shaped steel sheet pile 2A and a second cap-shaped steel sheet pile 2B) are connected to each other.

The plurality of cap-shaped steel sheet piles 2 are connected in the material axis direction Y to form an elongated longitudinally-connected cap-shaped steel sheet pile unit 70. Then, a plurality of the vertical connection cap-shaped steel sheet pile units 70 are continuously provided in the wall width direction Z, and a steel wall 7 is constructed in the site 8 or the like.

As shown in FIG. 2, the cap-shaped steel sheet piles 2 connected to the material axis direction Y are connected by the erecting portions 5 in a state where the end faces 3 a of the end portions 3 of the respective material axis directions Y face each other.

The erection portion 5 is made of, for example, steel and is erected across the side surfaces 3b, 3b of the end portions 3 in the material axis direction Y of the respective cap-shaped steel sheet piles 2 facing each other in the material axis direction Y.

As shown in FIG. 3, the hat-shaped steel sheet pile 2 includes a wing plate portion 2a, a pair of web portions 2b, a pair of arm portions 2c, and a pair of joint portions 2d. By fitting the joint portions 2d of the cap-shaped steel sheet piles 2 adjacent to each other in the wall width direction Z, a plurality of cap-shaped steel sheet piles 2 can be continuously installed in the wall width direction Z.

The cap-shaped steel sheet pile 2 extends toward the wall width direction Z to form a wing plate portion 2a, and a respective web portion 2b is formed by inclining each of both ends of the wing plate portion 2a in the wall width direction Z to form a groove portion S. The cap-shaped steel sheet pile 2 forms a respective arm portion 2c from one end of each web portion 2b, and forms a respective joint portion 2d at the front end of each arm portion 2c.

The cap-shaped steel sheet pile 2 has a flat surface 20 formed in a slightly flat shape on the wing plate portion 2a, the web portion 2b, and the arm portion 2c.

The erection portion 5 may be a flat surface 20 that is only erected on the wing plate portion 2 a as shown in FIG. 3, or may be a flat surface 20 that is erected on the wing plate portion 2 a and a pair of web portions 2 b as shown in FIG. 4. As shown in FIG. 5, the flat surface 20 may be bridged between the wing plate portion 2 a and the pair of arm portions 2 c. In particular, as shown in FIG. 5, the mounting portion 5 may be mounted not only on one side of the flat surface 20 but also on both sides. In the example shown in FIG. 4, although the three mounting portions 5 are flat surfaces 20 mounted on the wing plate portion 2 a and the pair of web portions 2 b, respectively, a plurality of mounting portions 5 may be integrated. Erected on a hat-shaped steel sheet pile.

As shown in FIGS. 6A and 6B, the mounting portion 5 includes a flat plate portion 51 using a steel plate or the like, and a mounting portion side protrusion 50 protruding from the flat plate portion 51 in the plate thickness direction X. The erection portion side protrusions 50 are continuous in the wall width direction Z and extend linearly, and are formed integrally with the flat plate portion 51 by hot rolling or cold rolling or the like.

The erection portion side protrusion 50 may be formed integrally with the flat plate portion 51 by cutting processing of a steel plate or the like. In addition, the mounting portion 5 may be obtained by using a steel plate as the flat plate portion 51 and fusing the mounting portion side protrusions 50 to the side surfaces thereof.

The erection portion 5 is, for example, a plate thickness dimension t of the flat plate portion 51 of approximately 9 mm to 25 mm, a width dimension B of approximately 50 mm to 125 mm, or approximately 200 mm to 400 mm, and a height dimension H of approximately 200 mm to 400 mm. The mounting portion 5 is such that the length L of the material axis direction Y of each of the mounting portion-side protrusions 50 is about 10 mm to 38 mm, and the height dimension h of the plate thickness direction X is about 4.5 mm to 25 mm. The distance D is about 60 mm to 100 mm.

As shown in FIGS. 7A and 7B, the erection portion 5 is continuous with the flat plate portion 51 on the side 3 b of the upper and lower hat-shaped steel sheet piles 2 toward the material axis direction Y, and the erection portion side protrusions 50 protrude from the flat plate portion 51 to the side 3 b. Way setting. The erection portions 5 are provided along the flat surfaces 20 formed at the respective end portions 3 of the hat-shaped steel sheet pile 2.

The flat portion 51 is formed in a substantially rectangular shape as shown in FIG. 7A, for example. As shown in FIG. 7B, the flat portion 51 penetrates in the plate thickness direction X on each of the upper side and the lower side in the material axis direction Y to form a bolt insertion hole 40. The flat plate portion 51 is provided with a plurality of erection portion-side protrusions 50 on the side surfaces opposed to the flat surface 20 of the end portion 3 of the cap-shaped steel sheet pile 2 along the material axis direction. In this case, since the bending stress received by each of the mounting-portion-side protrusions 50 can be reduced, damage to the mounting-portion-side protrusions 50 can be prevented. However, it is not necessary to provide a plurality of mounting portion-side protrusions 50, and only one may be provided.

As shown in FIG. 7A and FIG. 7B, the number-of-frame-side protrusions 50 are locked in the material axis direction Y to the locked portion 60 protruding outward from the side surface 3b of the end portion 3 of the first cap-shaped steel sheet pile 2A (the first A locked portion), and a locked portion 60 (second locked portion) protruding outward from the side surface 3b of the end portion 3 of the second cap-shaped steel sheet pile 2B. This restrains the relative movement between the first cap-shaped steel sheet pile 2A and the second cap-shaped steel sheet pile 2B in the material axis direction Y. In this way, the erection portion side protrusions 50 are formed on each side of the upper portion and the lower portion of the flat plate portion 51 in the material axis direction Y, and are locked to each other on the side surfaces 3 b of the end portion 3 of the first cap-shaped steel sheet pile 2A Being locked 60. Therefore, the bending stress acting on the longitudinal connection of the hat-shaped steel sheet pile 2 can be resisted by the erection portion 5, and the bending rigidity can be improved. In addition, since the plurality of cap-shaped steel sheet piles 2 can be easily and surely connected by the erection portion 5, a longitudinal connection construction can be performed without a welding operation requiring labor time and cost.

In the longitudinal connection structure 1 shown in FIGS. 7A and 7B, the locked portions 60 are continuous and extend linearly in the wall width direction Z, and a plurality of the locked portions 60 are spaced from each other along the material axis direction Y. The locked portion 60 is formed integrally with the plate member 6 (base material), and the plate member 6 is attached to the side surface 3 b of the end portion 3 of the hat-shaped steel sheet pile 2. The plate member 6 is formed integrally with the plate member 6 by the hot-rolled or cold-rolled rolling process or the like, and the engaged portion 60 that extends continuously in a linear shape toward the wall width direction Z is formed.

In the longitudinal connection structure 1 shown in FIGS. 7A and 7B, the end face 3a of the first cap-shaped steel sheet pile 2A and the end face of the locked portion 60 in the material axis direction Y of the plate member 6 are coplanar. The end surface 3 a of the second hat-shaped steel sheet pile 2B and the end surface of the locked portion 60 in the material axis direction Y of the plate member 6 are coplanar. According to this configuration, not only the end faces 3a of the first hat-shaped steel sheet pile 2A and the second hat-shaped steel sheet pile 2B, but also the end faces of the locked portions 60 can face each other. Therefore, since not only the end surface of the steel plate, but also the side of the locked portion, the pressure acting on the first cap-shaped steel sheet pile 2A and the second cap-shaped steel sheet pile 2B in a direction approaching to each other in the material axis direction can be resisted, so it can resist Greater bending load. Moreover, in the longitudinal connection structure 1 shown in FIGS. 7A and 7B, the end faces of the plate members 6 are opposed to each other. However, even in the case where the plate members 6 are not provided, as long as the material is the engaged portion 60, A configuration in which the end surface in the axial direction Y is an opposite surface can also achieve the same effect.

The locked portion 60 may be formed integrally with the plate member 6 by cutting of a steel plate or the like. In addition, the locked portion 60 may be obtained by using a steel plate as the plate member 6 and welding flat steel by side welding.

In the longitudinal connection structure 1 shown in FIG. 7A and FIG. 7B, a plurality of the locked portions 60 are spaced apart from each other along the material axis direction Y on the side surfaces thereof. Therefore, since the bending stress received by each of the locked portions 60 can be reduced, damage to the locked portions 60 can be prevented. However, only one locked portion 60 may be provided.

Further, in the longitudinal connection structure 1 shown in FIG. 7A and FIG. 7B, a plurality of locked portions 60 that are spaced apart from each other along the material axis direction Y are formed integrally with a single plate member 6. The plate member 6 is a common base material. Therefore, the separation distance between the plurality of locked portions 60 spaced apart from each other in the material axis direction can be kept constant. Therefore, when the plurality of locked portions 60 are attached to the hat-shaped steel sheet pile 2, all the locked portions can be accurately installed in a process of fixing the plate member 6 as a base material to the hat-shaped steel sheet pile 2. 60. However, as shown in FIG. 8A, flat steel or the like may be attached to the end surface 3b of the end portion 3 of the hat-shaped steel sheet pile 2 by direct welding or the like, so that the locked portion 60 may be provided.

Furthermore, in the longitudinal connection structure 1 shown in FIGS. 7A and 7B, although the mounting portion 5 is a locked portion 60 that is locked to the first cap-shaped steel sheet pile 2A and the second cap-shaped steel sheet pile 2B, the mounting portion 5 is erected. As shown in FIG. 8B, the portion 5 may be a locked portion 60 that is locked only to the first cap-shaped steel sheet pile 2A. In this case, the flat portion 51 of the mounting portion 5 does not form the mounting portion side protrusion 50, and the side surface 3b and the flat portion 51 of the end portion 3 of the second cap-shaped steel sheet pile 2B are mounted by direct welding or the like. In addition, as shown in FIG. 8C, the erection portion 5 may be mounted on both sides of the hat-shaped steel sheet pile 2.

As shown in FIGS. 7A and 7B, the erection portion 5 penetrates the side surface 3 b of the end portion 3 of the cap-shaped steel sheet pile 2 from the flat plate portion 51 in the thickness direction X to the end portion 3 of the cap-shaped steel sheet pile 2. 4 but bolted. The erection portion 5 is fixed to the end portion 3 of the cap-shaped steel sheet pile 2 by screwing the fastening nut 41 to the bolt 4 on the back surface of the end portion 3 of the cap-shaped steel sheet pile 2.

The erection portion 5 is not only fixed by using the fastening nut 41 fastened in the plate thickness direction X, as shown in FIGS. 9A and 9B. For example, the erection portion 5 may be flat using the end portion 3 provided in the cap-shaped steel sheet pile 2. The welding nut 42 or the female screw portion 43 of the surface 20 is fixed. At this time, the mounting portion 5 is fixed by screwing the bolt 4 to the welding nut 42 or the female screw portion 43. Moreover, even in this case, the erection portion 5 may be mounted on both sides of the hat-shaped steel sheet pile 2.

The bolt 4 is inserted through the bolt insertion hole 40 formed in the flat plate portion 51 of the mounting portion 5, the plate member 6, and the end portion 3 of the cap-shaped steel sheet pile 2. As shown in FIG. 9A, the bolt 4 is screwed to a welding nut 42 installed at the end 3 of the cap-shaped steel sheet pile 2 by welding, or as shown in FIG. 9B, screwed to be formed by processing a female thread. A female threaded portion 43 at the end portion 3 of the hat-shaped steel sheet pile 2.

As shown in FIG. 10, the erected portion side protrusion 50 and the locked portion 60 are formed in a substantially rectangular shape in cross section. The mounting portion side protrusions 50 and the locked portions 60 are particularly formed by hot rolling or cold rolling, as shown in FIG. 11, and may be formed into a trapezoidal cross section. As shown in FIG. 12, it may be formed in a T-shaped cross section.

As shown in FIG. 10 to FIG. 12, the mounting portion side protrusion 50 and the locked portion 60 receive tension T in a direction in which the plurality of cap-shaped steel sheet piles 2 are spaced apart from each other in the material axis direction, thereby causing the mounting portion side protrusion 50. One end surface of the material axis direction Y and the one end surface of the material axis direction Y of the locked portion 60 are in contact with each other.

The erected portion-side protrusion 50 and the locked portion 60 abut on each of the end surfaces facing each other in the material axis direction Y to form a contact surface 30. The erection portion side protrusion 50 and the locked portion 60 are locked to each other at the abutment surface 30 in the material axis direction Y by one of the end surfaces to resist the tension T, so that the plurality of cap-shaped steel sheet piles 2 are restrained to the material axis. The directions Y are not separated from each other.

As shown in FIG. 10, the mounting portion-side protrusion 50 and the locked portion 60 are formed to have a substantially rectangular cross section, so that the abutting surface 30 of the mounting portion-side protrusion 50 is formed to be slightly orthogonal to the side surface of the flat plate portion 51 of the mounting portion 5. The abutment surface 30 of the locked portion 60 is formed to be slightly orthogonal to the flat surface 20 of the end portion 3 of the cap-shaped steel sheet pile 2 or the side surface of the plate member 6.

As shown in FIG. 11, the erected portion-side protrusion 50 and the locked portion 60 are formed in a slightly trapezoidal cross-section, thereby forming an erection inclined in a tapered shape in the thickness direction X toward the end portion 3 of the hat-shaped steel sheet pile 2. The portion-side protrusion 50 forms a locked portion 60 that is tapered in the thickness direction X toward the flat portion 51 of the mounting portion 5.

As shown in FIG. 11, the front end portion 50 a of the erection portion side protrusion 50 protruding toward the side surface 3 b of the end portion 3 of the hat-shaped steel sheet pile 2 is more than the base end side 50 b of the flat portion 51 connected to the erection portion 5. The width in the axial direction Y is widened so as to be tapered. In addition, the front end side 60 a of the locked portion 60 protruding toward the flat portion 51 of the mounting portion 5 is more than the flat surface 20 connected to the end portion 3 of the cap-shaped steel sheet pile 2 or the base end side 60 b of the plate member 6. , Inclined into a tapered shape so that the Y width in the material axis direction becomes wider.

As shown in FIG. 11, the erected portion-side protrusion 50 and the locked portion 60 are formed into a substantially flat shape with each other at one end surface, so that the contact surfaces 30 inclined in a tapered shape in the plate thickness direction X abut against each other. The erected portion-side protrusion 50 and the locked portion 60 are inclined into a tapered shape so that the width of the front end side 50a of the erected portion-side protrusion 50 is widened, and the width of the front-end side 60a of the engaged portion 60 is widened. Inclined into a tapered shape, the locking surfaces 30 are locked so that they do not separate from each other in the thickness direction X.

As shown in FIG. 12, the erection portion side protrusion 50 and the locked portion 60 are formed to have a slightly T-shaped cross section, and the end portion 50 a before the erection portion side protrusion 50 forms a erection portion side extending toward the material axis direction Y. The portion 52 is formed with a locked portion side extending portion 62 extending in the material axis direction Y on the front end side 60 a of the locked portion 60.

The erection portion side protrusion 50 and the locked portion 60 are a base end side 50 b of the erection portion side protrusion 50 and the locked portion side extension portion 62 of the locked portion 60 are formed slightly parallel to each other and abut on the abutment surface 30. The erected portion-side protrusion 50 and the locked portion 60 are the erected portion-side extension portion 52 of the erected portion-side protrusion 50 and the base end side 60 b of the engaged portion 60 to be formed slightly parallel to each other and abut on the abutment surface 30.

The erected portion side protrusion 50 and the locked portion 60 use the erected portion side extension portion 52 of the front end side 50a of the erected portion side protrusion 50 and the locked portion side extension portion 62 of the front end side 60a of the locked portion 60. The axial direction Y is formed so as to extend, and is locked so as not to be separated from each other in the plate thickness direction X.

Moreover, the mounting part side protrusion 50 and the to-be-locked part 60 may be formed with the mounting part side protrusion 50 inclined obliquely, and the locking part 60 inclined and taper-shaped may be formed, and the mounting part side protrusion may be formed. 50, the erected portion side extension portion 52 of the front end side 50a, and the locked portion side extension portion 62 of the front end side 60a of the locked portion 60.

As shown in FIG. 13, the erected portion-side protrusion 50 and the locked portion 60 may be arranged in contact with each other when the distance D between them is larger than the length L of the respective material axis direction Y. The surface 30 is an end surface on the opposite side, and the erection portion side protrusion 50 is welded to the side of the flat plate portion 51 of the erection portion 5, and is welded to the flat surface 20 of the end portion 3 of the cap-shaped steel sheet pile 2 or the side of the plate member 6 Engagement portion 60.

The longitudinal connection structure 1 desirably forms a plurality of erection portion side protrusions 50 which are locked to the plurality of locked portions 60, and as shown in FIGS. 14A, 14B, 14C, 14D, 15A, 15B, 16A, and 16B, The erected portion-side protrusion 50 and the locked portion 60 are formed by being inclined in a tapered shape. The longitudinal connection structure 1 uses an end surface 53 in the material axis direction Y of the protruding portion-side protrusion 50 to form an R portion 30a at the front end portion 50a and the base end side 50b of the protruding portion-side protrusion 50. The one end surface 63 in the axial direction Y forms an R portion 30a on the front end side 60a and the base end side 60b of the locked portion 60, and the workability is improved by a simple extrusion process.

14A and 14B, the longitudinal connection structure 1 is formed on one end surface 53 of each of the erection portion-side protrusions 50 facing each other in the material axis direction Y, as shown in Figs. 14A and 14B. It is preferable to form a tapered shape, and it is preferable to form the tapered shape so that one end faces 63 of the respective locked portions 60 facing each other in the material axis direction Y are slightly flat. In this case, in a state where the projecting portion-side protrusion 50 is locked to the locked portion 60, one end surface 53 of the mounting portion-side protrusion 50 and the one end surface 63 of the locked portion 60 are formed facing each other in the material axis direction Y. In order to be slightly flat, the workability can be further improved.

At this time, the longitudinal connection structure 1 is a base end of the plurality of erection portion side protrusions 50 separated from each other in the material axis direction Y by the interval W1 of the plurality of erection portion side protrusions 50 spaced from each other in the material axis direction Y. The interval W2 of the side 50b is approximately the same size, and the inclination angle θ1 (inclination angle of the side surface away from the end portion 3) of the abutment surface 30 of the erection portion side protrusion 50 resisting the tension T is opposite to the abutment surface 30. The inclination angle θ2 of the one end surface 53 (the inclination angle close to the side surface of the end portion 3) is approximately the same at each position.

In addition, the longitudinal connection structure 1 is a base end side in which the plurality of locked portions 60 are spaced apart from each other in the material axis direction Y and the base end side is spaced apart from the plurality of locked portions 60 in the material axis direction Y. The interval W2 of 60b is almost the same size, and the inclination angle θ1 of the abutment surface 30 of the locked portion 60 against the tension T and the inclination angle θ2 of the end surface 63 on the opposite side to the abutment surface 30 are at respective positions. Becomes approximately the same size.

The longitudinal connection structure 1 can, for example, make the radius of curvature of the R portion 30a approximately 5 mm and the inclination angle θ1 approximately 45 °. The longitudinal connection structure 1 is, for example, to make the interval W1 approximately 30 mm, and the smaller the difference in the size of the interval W1 and the interval W2 is, the more advantageous it is to improve the workability of the extrusion process.

In the example shown in FIG. 14B, although the inclination angle θ1 is smaller than 90 ° and the inclination angle θ2 exceeds 90 °, the modification shown in FIG. 14C may be such that the inclination angle θ1 exceeds 90 ° and the inclination angle θ2 is less than 90 °. In the example shown in FIG. 14B, although both side surfaces of the protrusion 50 are made parallel, in another modification shown in FIG. 14D, the protrusion 50 may be formed into a shape where the leading end becomes thinner toward the leading end side.

In addition, in the case where the longitudinal connection structure 1 is formed on the mounting portion side protrusion 50 and the locked portion 60 in a slightly ladder shape in cross section, as shown in FIG. 15A and FIG. 15B, the plurality of mounting portion side protrusions 50 on the front end side 50a The interval W1 is formed to be smaller than the interval W2 of the base end side 50b of the plurality of erected portion-side protrusions 50, and the interval W1 of the front end side 60a of the plurality of to-be-locked portions 60 is formed to be a base larger than the plurality of to-be-locked portions 60 The interval W2 of the end side 60b is still small. At this time, as shown in FIGS. 16A and 16B, the longitudinal connection structure 1 may be an inclination angle of an end surface 53 of one of the mounting portion-side protrusions 50 on the opposite side to the abutment surface 30 and an angle of the locked portion 60. The inclination angle (inclination angle θ2) of the one end surface 63 forms a slightly right angle.

Here, the longitudinal connection structure 1 is shown in FIG. 17A, and the pressure P acting on the plurality of cap-shaped steel sheet piles 2 in the direction of the material axis Y is approached, or as shown in FIG. 17B, in the plurality of caps. The steel sheet pile 2 has a tensile force T acting in the direction of the material axis Y in a direction in which it leaves. The longitudinal connection structure 1 is subjected to tension T in the plurality of cap-shaped steel sheet piles 2. Since the center of gravity of the flat portion 51 from the abutment surface 30 of the mounting portion side projection 50 is distanced from the plate thickness direction X, it becomes the mounting portion 5 The person acting eccentrically bends, and as shown in FIG. 17C, warping deformation occurs in the mounting portion 5 and the mounting portion side protrusion 50 may be detached.

Therefore, as shown in FIG. 18A to FIG. 18C, the longitudinal connection structure 1 is desirably in a state where the erection portion side protrusions 50 formed on the most end portion side G of the material axis direction Y are separated or abutted from both sides of the material axis direction Y. Next, it is sandwiched between the two locked portions 60. At this time, the longitudinal connection structure 1 is provided with the locked portion 60 on the upper end side of the material axis direction Y of the mounting portion 5 and above the mounting portion side protrusion 50, and on the lower end side of the material axis direction Y of the mounting portion 5, A to-be-locked portion 60 is provided below the mounting portion-side protrusion 50.

Thereby, the longitudinal connection structure 1 is sandwiched into the plurality of locked portions 60 from both sides in the material axis direction Y by the erecting portion side protrusions 50 on the most end portion side G of the material axis direction Y, as shown in FIG. 18B, Even if the eccentric bending acts on the mounting portion 5, it is locked to the locked portion 60 above or below the mounting portion-side protrusion 50. Therefore, warpage and deformation of the mounting portion 5 can be suppressed, and detachment of the mounting portion-side protrusion 50 can be prevented. The longitudinal connection structure 1 is formed by the one end surface 53 of the erected portion side protrusion 50 and the one end surface 63 of the locked portion 60 which are opposite to the abutment surface 30, except that they are formed at a slightly right angle, as shown in FIG. 18C. It is preferable that they are formed in a tapered shape and are locked to each other to prevent the erection portion-side protrusion 50 from coming off more reliably.

As shown in FIGS. 19A to 19C, the longitudinal connection structure 1 has a thickness t2 of the flat plate portion 51 in the material axis direction Y compared to the end portion side G of the mounting portion 5, and the central side in the material axis direction Y. It is preferable that the plate thickness dimension t1 of the flat plate portion 51 of F is larger. In this way, the section area other than the locking portion of the erected portion 5 and the locked portion 60 when viewed in a cross section in the vertical direction of the material axis Y is maximized at the position of the opposite surface of the cap-shaped steel sheet pile 2, Thereby, the cross-sectional area where the bending rigidity is most required in the erection portion 5 can be made larger. Therefore, it is possible to ensure both weight reduction and bending rigidity of the erection portion 5.

In the longitudinal connection structure 1 shown in FIG. 19A, the erection portion 5 is formed in a tapered shape by projecting the outer surface 51a of the flat plate portion 51 on the central side F compared with the end portion G, so that the thickness t1 is smaller than The thickness t2 is large. In the longitudinal connection structure 1 shown in FIGS. 19B and 19C, the inner surface 51b of the flat plate portion 51 is protruded and formed on the central side F compared to the end portion G so that the thickness t1 is larger than the thickness t2 is big. Specifically, as shown in FIG. 19B, the thickness of the flat plate portion 51 may be continuously reduced as it leaves the end portion 3, or as shown in FIG. 19C, the plate may be made thinner as it leaves the end portion 3. The thickness of the portion 51 is gradually reduced to a step shape, so that the plate thickness dimension t1 is larger than the plate thickness dimension t2.

Thereby, the longitudinal connection structure 1 uses the plate thickness dimension t1 of the flat plate portion 51 on the central side F to be larger than the plate thickness dimension t2 of the flat plate portion 51 on the end portion G of the erecting portion 5, so that the The rigidity of the installation part 5 of the center side F is improved. Therefore, even when the eccentric bending acts on the mounting portion 5, it is possible to suppress warpage and deformation in the mounting portion 5 and prevent the mounting portion-side protrusion 50 from detaching. In addition, as shown in FIG. 18A to FIG. 18C, the longitudinal connection structure 1 sandwiches the erecting portion-side protrusions 50 on the most end portion side G as a plurality of clamped portions 60 from both sides of the material axis direction Y. As shown in FIGS. 19A to 19C, the plate thickness dimension t1 of the flat plate portion 51 on the center side F can be made larger in the material axis direction Y.

As described above, in the longitudinal connection structure 1 shown in FIGS. 11, 12, 14A to 19C, and the like, the engaged portion 60 has an extension protrusion (inclined into a tapered shape) extending toward the material axis direction Y on the front end side thereof. A part of the locked portion 60 or the locked portion side extending portion 62). The extension protrusion is locked in a recess of the mounting portion 5 formed to extend in the wall width direction Z. With this, the connection work can be easily performed, and the detachment of the mounting portion 5 can be reliably prevented.

In the case where the longitudinal connection structure 1 is formed in a slightly rectangular cross section on the mounting portion side protrusion 50 and the locked portion 60, as shown in FIG. 20, the mounting portion 5 is directed from the outside of the groove portion S of the hat-shaped steel sheet pile 2 toward the plate thickness. Move in direction X. At this time, the erection portion 5 is attached to the hat-shaped steel sheet pile 2 from the outside of the groove portion S, and is fixed with a bolt 4 or the like. Further, the erection portion 5 may be moved from the inside of the groove portion S of the cap-shaped steel sheet pile 2 and attached to the hat-shaped steel sheet pile 2 from the inside of the groove portion S.

In the case where the longitudinal connection structure 1 is formed on the side of the mounting portion 50 and the locked portion 60 is formed in a trapezoidal cross-section or a T-shaped cross-section, as shown in FIG. 21, the mounting portion 5 is slid in the wall width direction Z. mobile. At this time, the mounting portion 5 is slid into the mounting portion side protrusion 50 between the plurality of to-be-locked portions 60, and the plurality of mounting portion-side protrusions 50 are slid into the to-be-locked portion 60 and fixed so as not to face the thickness direction. X is separated.

As shown in FIG. 22, the vertical connection structure 1 may be formed in a wedge shape by the locked portion 60 and the mounting portion side protrusion 50. In this case, the workability when the locked portion 60 is slidly inserted between the plurality of mounting portion side protrusions 50 can be improved, and the friction between the mounting portion side protrusions 50 and the locked portion 60 can be improved, and It is possible to prevent the erection portion 5 from being detached. Further, the clearance between the protrusions is reduced, and sliding deformation during deformation can also be reduced.

As shown in FIG. 23A and FIG. 23B, the longitudinal connection structure 1 may be cut by a plate member 6 and a mounting portion 5 formed with a locked portion 60 along a cutting line E inclined toward the material axis direction Y or the like. Processing, etc. At this time, as shown in FIG. 23C, the longitudinal connection structure 1 inclines the locked portion 60 and the mounting portion side protrusion 50 toward the wall width direction Z, and uses the sliding portion 5 to move the mounting portion 5 toward the wall width direction Z. A plurality of mounting portion-side protrusions 50 are slidably inserted between the locking portions 60.

The longitudinal connection structure 1 is provided with a brake member 33 at one side end in the wall width direction Z as required. When the mounting portion 5 is slid and moved in the wall width direction Z, the mounting portion 5 is brought into contact with the brake member 33. At this time, the vertical connection structure 1 is slid by the locked portion 60 and the mounting portion side protrusion 50 to facilitate the sliding movement of the mounting portion 5, and prevents the mounting portion 5 from abutting the mounting portion 5 against the brake member 33. By performing the sliding movement more than necessary, the mounting portion 5 can be prevented from falling off.

The vertical connection structure 1 may be mounted on the ends of the first cap-shaped steel sheet pile 2A and the second cap-shaped steel sheet pile 2B as shown in FIGS. 24A and 24B as required. The side 3b of the part 3. At this time, the longitudinal connection structure 1 may be, for example, a plate member 6 formed on the side of the first cap-shaped steel sheet pile 2A to form a protruding portion 65 protruding toward the material axis direction Y, and a plate member 6 on the side of the second cap-shaped steel sheet pile 2B. A recessed portion 66 is formed which is recessed in the material axis direction Y.

As shown in FIG. 24A and FIG. 24B, in the longitudinal connection structure 1, when the first cap-shaped steel sheet pile 2A and the second cap-shaped steel pile 2B are connected to each other in the material axis direction Y, they are formed on the first cap-shaped steel sheet pile 2A side The protruding portion 65 of the plate member 6 is fitted into the recessed portion 66 of the plate member 6 formed on the second cap-shaped steel sheet pile 2B side. With this, the longitudinal connection structure 1 can be fitted into the recessed portion 66 by the protruding portion 65, and the end portion 3 of the plurality of hat-shaped steel sheet piles 2 can be easily positioned in the wall width direction Z. In addition, the vertical connection structure 1 is formed by inclining the protruding portion 65 and the recessed portion 66 in the wall width direction Z, and the inclined surfaces of the protruding portion 65 and the recessed portion 66 serve as guide portions, so that the protruding portion can be easily implemented. 65 and recess 66 are fitted.

As shown in FIG. 25A to FIG. 25C, the longitudinal connection structure 1 may be in a state in which a plurality of erection portion side protrusions 50 are slidly inserted between a plurality of locked portions 60 so that the enclosures are mutually enclosed in the material axis direction Y. The locked mounting portion side protrusion 50 and the frame member 55 of the locked portion 60 are provided in the mounting portion 5. At this time, the longitudinal connection structure 1 can sandwich the mounting portion-side protrusion 50 and the locked portion 60 with both side portions 55 a of the frame member 55 to prevent the sliding movement of the mounting portion 5 more than necessary. Furthermore, the longitudinal connection structure 1 forms grooves 54 on the upper end surface 5b of the mounting portion 5 as necessary, and the upper end portion 55b of the frame member 55 fits into the groove 54 to restrain the movement in the thickness direction X of the frame member 55 and prevent The frame member 55 comes off.

As shown in FIGS. 26A and 26B, the longitudinal connection structure 1 may be formed by inclining the lower end surface 5 a of the erecting portion 5 from above the material axis direction Y downward to the end portion 3 side of the hat-shaped steel sheet pile 2. The longitudinal connection structure 1 utilizes a hat-shaped steel sheet pile 2 (vertically connected with a hat-shaped steel sheet pile) in a state where the lower end surface 5a of the erected portion 5 is inclined toward the end portion 3 side of the hat-shaped steel sheet pile 2 When the unit 70) is embedded, it is possible to reduce the installation resistance received by the lower end surface 5a of the erecting portion 5.

Here, the longitudinal connection structure 1 may be provided on the end surface 5 b of the mounting portion 5 or the outer surface 51 a of the flat plate portion 51 with bolts 4 continuously extending from the mounting portion 5 to the locked portion 60 or the plate member 6. 、 Screw and other shaft members 56. Moreover, the longitudinal connection structure 1 may be provided with a plate member 44 of flat steel or the like extending from the erecting portion 5 to the locked portion 60 or the plate member 6 and fixing the plate 44 by screwing or the like.

In addition, as shown in FIG. 27A to FIG. 27C, the vertical connection structure 1 may be partially cut in the wall width direction Z by making the mounting portion side protrusions 50 and the locked portions 60, and the mounting portion side protrusions 50 and The locked portion 60 forms a cut groove 57a. At this time, in the longitudinal connection structure 1, a substantially square-shaped latch member 57 is fitted in the cut groove 57 a formed by partially cutting the erected portion side protrusion 50 and the locked portion 60 to extend in the material axis direction Y. . Further, from the viewpoint of workability, it is preferable that the cut groove 57a and the latch member 57 have a triangular shape that is not substantially square and gradually decreases in width toward the front end portion side.

In this way, the vertical connection structure 1 may be provided with only the frame member 55 shown in FIGS. 25A to 25C, the shaft member 56 shown in FIGS. 26A and 26B, the plate member 44, and the latch member shown in FIGS. 27A to 27C. Any one of 57 is provided as a slip prevention part, and these are suitably combined as needed. Thereby, the vertical connection structure 1 can restrain the movement of the wall width direction Z of the mounting part 5 by a slide prevention part, and can prevent the mounting part 5 from falling off.

In the vertical connection structure 1, when the protrusion 50 on the mounting portion side and the locked portion 60 are formed in a trapezoidal cross-section or a T-shaped cross-section, the mounting portion 5 is fixed so as not to separate in the thickness direction X. The mounting portion The movement in the wall width direction Z of 5 is restricted by a frame member 55 or the like, and the erecting portion side protrusion 50 and the locked portion 60 are locked in the material axis direction Y. At this time, the longitudinal connection structure 1 is made without using the bolt 4 penetrating the end portion 3 of the cap-shaped steel sheet pile 2 in the thickness direction X to prevent the mounting portion 5 from falling off, and no opening is formed in the end portion 3 of the cap-shaped steel sheet pile 2. However, the water-stopping performance of the cap-shaped steel sheet pile 2 can be improved.

When the longitudinal connection structure 1 is shown in FIG. 28 in particular, when the plurality of cap-shaped steel sheet piles 2 connected by the erection portion 5 are buried in the site 8, or the plurality of cap-shaped steel sheet piles 2 are already buried, In the state of entering the ground 8, the bending load M acts on the plurality of cap-shaped steel sheet piles 2.

In order that the longitudinal connection structure 1 can sufficiently resist the bending load M at the place where the plurality of cap-shaped steel sheet piles 2 are connected, it is desirable that the bending rigidity and the bending strength of the erection portion 5 be made to the same degree as those of the cap-shaped steel sheet pile 2 alone. At this time, the longitudinal connection structure 1 uses, for example, the mounting portion 5 to be mounted on the wing portion 2a and the arm portion 2c, so that the distances e1 and e2 from the neutral axis C of the bending load M to the center of gravity of the mounting portion 5 follow the neutrality. The distance between the axis C and the wing plate portion 2a and the arm portion 2c of the hat-shaped steel sheet pile 2 is almost the same.

The longitudinal connection structure 1 is preferably such that the dimension in the thickness direction X of the mounting portion 5 is smaller than the dimension in the wall width direction Z of the mounting portion 5. In this case, since the distances e1 and e2 from the neutral axis C of the bending load M to the center of gravity of the erection portion 5 are approximately the same as the wing plate portion 2a and the arm portion 2c of the hat-shaped steel sheet pile 2, the erection has The erected portion 5 of the hat-shaped steel sheet pile 2 has the same cross-sectional area, and the bending rigidity and bending strength of the erected portion 5 can be the same as those of the hat-shaped steel sheet pile 2 alone. Even in the erection portion 5 having the same thickness as the hat-shaped steel sheet pile 2, the longitudinal connection structure 1 can sufficiently resist the bending load M at the place where the plurality of hat-shaped steel sheet piles 2 are connected, so that the erection portion 5 can be made lighter. Volume and small.

The longitudinal connection structure 1 particularly uses the erecting portion 5 at a position away from the neutral axis C of the bending load M, so that the second bending moment of the cross-section of the erecting portion 5 becomes larger, even if the thickness of the erecting portion 5 is thinner. It is also possible to sufficiently resist the bending load M at a place where a plurality of cap-shaped steel sheet piles 2 are connected. Thereby, the longitudinal connection structure 1 can ensure sufficient bending rigidity at the place where the plurality of cap-shaped steel sheet piles 2 are connected, and the mounting portion 5 can be made lightweight and small, thereby suppressing the connection cost of the plurality of cap-shaped steel sheet piles.

The longitudinal connection structure 1 can ensure sufficient bending rigidity at the place where the plurality of hat-shaped steel sheet piles 2 are connected, so the place where the plurality of hat-shaped steel sheet piles 2 are connected does not become a structural weakness, and the Y-connection toward the material axis can be avoided. The reduction of the bending performance of the hat-shaped steel sheet piles in the longitudinal joint of the plurality of hat-shaped steel sheet piles has been reduced.

In addition, the longitudinal connection structure 1 is specified in a direction in which the bending load M is applied. As shown in FIG. 3, only the mounting portion 5 is mounted on the flat surface 20 of the wing plate portion 2 a on the tension side, and the mounting can be suppressed as a mounting. The amount of steel used in Section 5.

As shown in FIG. 10 to FIG. 12, the longitudinal connection structure 1 uses a plurality of cap-shaped steel sheet piles 2 connected in the material axis direction Y to be locked by the abutting surface 30 in the material axis direction Y, thereby resisting the tensile force T. The compressive strength of the erection portion side protrusion 50 and the locked portion 60 required to resist the tensile force T is generally about 1.5 times higher than the tensile strength. Therefore, the erection is performed by using the thickness t ′ of the cap-shaped steel sheet pile 2. The height h in the thickness direction X of the portion-side protrusion 50 and the locked portion 60 is reduced to about 70% (h = 1 / 1.5 × t ′), so that the mounting portion 5 can be made lighter and smaller.

As shown in FIG. 1, the steel wall 7 is provided with an erecting portion 5 that erects the side surface 3 b of the end portion 3 of the plurality of cap-shaped steel sheet piles 2 connected to each other in the material axis direction Y, and uses the erecting portion 5 in the material axis direction Y. A plurality of longitudinally connected cap-shaped steel sheet pile units 70 are connected to a plurality of cap-shaped steel sheet piles, and the plurality of longitudinally connected cap-shaped steel sheet pile units 70 are continuously installed in the wall width direction Z, and are constructed to face the wall in the site, such as 8 The width direction Z extends.

The steel wall 7 is particularly a plurality of longitudinally connected cap-shaped steel sheet pile units 70 which are continuously arranged adjacent to each other in the wall width direction Z, so that the positions of the material axis directions Y are different from each other. Erection section 5. At this time, the steel wall 7 is connected by a plurality of cap-shaped steel sheet piles 2 in a slightly staggered shape (thousand bird shape) or the like in the wall width direction Z, and the structure that can become each longitudinally connected cap-shaped steel sheet pile unit 70 can be avoided. The weak points are connected at substantially the same position in the material axis direction Y and are continuous in the wall width direction Z.

As mentioned above, the embodiment of the present invention has been described in detail. However, any of the above embodiments is merely a concrete example of implementing the present invention, and the technical scope of the present invention is not limited to the embodiments. [Industrial possibilities]

According to the present invention, in the place where a plurality of cap-shaped steel sheet piles are connected in the direction of the material axis Y, sufficient bending rigidity is ensured, and a longitudinal connection structure and a cap-shaped steel plate of a cap-shaped steel sheet pile capable of suppressing connection costs can be provided. Pile units, and steel walls.

Vertical connection structure of 1‧‧‧ hat-shaped steel sheet pile
2‧‧‧ hat-shaped steel sheet pile
2A‧‧‧The first cap steel sheet pile
2B‧‧‧Second-cap steel sheet pile
2a‧‧‧wing board
2b‧‧‧ Web
2c‧‧‧arm
2d‧‧‧Joint Department
3‧‧‧ end
3a‧‧‧face
3b‧‧‧ side
3c‧‧‧ side
4‧‧‧ bolt
5‧‧‧Erecting Department
5a‧‧‧ bottom face
5b‧‧‧upper face
6‧‧‧ plate member
7‧‧‧ steel wall
In the site of 8‧‧‧
20‧‧‧ flat surface
30‧‧‧ abutment
30a‧‧‧R
33‧‧‧Brake member
40‧‧‧ bolt insertion hole
41‧‧‧Tightening nut
42‧‧‧ Bolt
43‧‧‧Female thread
44‧‧‧plate
50‧‧‧ Projection side
50a‧‧‧front side
50b‧‧‧base side
51‧‧‧ Flat Department
51a‧‧‧outer surface
51b‧‧‧Inner surface
52‧‧‧Side Extension
53‧‧‧face
54‧‧‧ trench
55‧‧‧Frame components
55a‧‧‧side
55b‧‧‧upper end
56‧‧‧ Shaft members
57‧‧‧ latch member
57a‧‧‧cut groove
60‧‧‧ Locked
60a‧‧‧Front side
60b‧‧‧base side
62‧‧‧ Side extension of the locked portion
63‧‧‧face
65‧‧‧ protrusion
66‧‧‧ Depression
70‧‧‧ Longitudinal connection cap type steel sheet pile unit
B‧‧‧Width
C‧‧‧ neutral axis
D‧‧‧distance
E‧‧‧cut line
e1‧‧‧distance
e2‧‧‧distance
F‧‧‧ Central side
G‧‧‧End side
H‧‧‧height size
h‧‧‧ height dimension
L‧‧‧ length
M‧‧‧ bending load
P‧‧‧Pressure
S‧‧‧Ditch
T‧‧‧ tension
t'‧‧‧ plate thickness
t1‧‧‧plate thickness
t2‧‧‧plate thickness
W1‧‧‧ interval
W2‧‧‧ interval
X‧‧‧ thickness direction
Y‧‧‧ material axis direction
Z‧‧‧Wall width direction
q1‧‧‧Tilt angle
q2‧‧‧Tilt angle

FIG. 1 is a perspective view showing a steel wall to which a longitudinal connection structure of a hat-shaped steel sheet pile is applied. Fig. 2 is a front view of a longitudinal connection structure of a hat-shaped steel sheet pile. FIG. 3 is a plan view of the longitudinal connection structure shown in FIG. 2. FIG. 4 is a plan view of a longitudinal connection structure when an erecting portion is also provided in a web portion of a hat-shaped steel sheet pile. Fig. 5 is a plan view of a longitudinal connection structure when mounting portions are provided on both sides of a hat-shaped steel sheet pile. Fig. 6A is a rear view of the mounting portion. FIG. 6B is a side view of the mounting portion. FIG. 7A is a front view of the longitudinal connection structure, and a part is viewed from a cross section. FIG. 7B is a longitudinal sectional view of the longitudinal connection structure. 8A is a longitudinal cross-sectional view of a longitudinal connection structure in which a locked portion is provided at both ends of a first cap-shaped steel sheet pile and a second cap-shaped steel sheet pile. FIG. 8B is a longitudinal cross-sectional view of a longitudinal connection structure in which a locked portion is provided only at an end portion of the first hat-shaped steel sheet pile. FIG. 8C is a longitudinal cross-sectional view of a longitudinal connection structure in which locked portions are provided on both sides of a hat-shaped steel sheet pile. FIG. 9A is a longitudinal cross-sectional view of a longitudinal connection structure of a welded nut screw bolt. FIG. 9B is a longitudinal cross-sectional view of a longitudinal connection structure of a bolt in a female screw portion formed on a side surface of a hat-shaped steel sheet pile. FIG. 10 is a side view of a longitudinal connection structure in which a protrusion on a side of a mounting portion and a portion to be locked are formed into a substantially rectangular cross section. FIG. 11 is a side view of a longitudinal connection structure in which a protruding portion side protrusion and a locked portion are formed into a trapezoidal cross-section. FIG. 12 is a side view of a longitudinal connection structure in which a protruding portion-side protrusion and a locked portion form a T-shaped cross section. FIG. 13 is a side view of a longitudinal connection structure in which a protruding portion side protrusion and a locked portion are formed by welding of flat steel. 14A is a longitudinal cross-sectional view of a longitudinal connection structure in which a protrusion on a side of an erecting portion and a portion to be locked form a parallel with each other. Fig. 14B is a partially enlarged view of the longitudinal connection structure shown in Fig. 14A. FIG. 14C is a modification of the vertical connection structure shown in FIG. 14A. Fig. 14D is another modified example of the longitudinal connection structure shown in Fig. 14A. 15A is a longitudinal cross-sectional view of a longitudinal connection structure in which the distance between the protrusion on the mounting portion side and the front end side of the locked portion is smaller than the distance on the base end side. Fig. 15B is a partially enlarged view of the longitudinal connection structure shown in Fig. 15A. FIG. 16A is a longitudinal cross-sectional view of a longitudinal connection structure that forms a slightly right angle with an end surface on the opposite side of the abutting portion-side protrusion and the abutted portion. FIG. 16B is a partially enlarged view of the longitudinal connection structure shown in FIG. 16B. FIG. 17A is a longitudinal sectional view for explaining a pressure applied to a hat-shaped steel sheet pile. FIG. FIG. 17B is a longitudinal sectional view for explaining a pulling force acting on the hat-shaped steel sheet pile. FIG. 17C is a vertical cross-sectional view illustrating warpage and deformation in the mounting portion. FIG. FIG. 18A is a vertical cross-sectional view of a longitudinal connection structure in which a protrusion on a side of a mounting portion is sandwiched into a locked portion. FIG. FIG. 18B is a longitudinal cross-sectional view showing the erected portion when eccentric bending acts in the longitudinal connection structure shown in FIG. 18A. 18C is a longitudinal cross-sectional view of a longitudinal connection structure in which the protrusion on the side of the mounting portion and the portion to be locked form a cone at a position farthest from the opposing surface of the first cap-shaped steel sheet pile and the second cap-shaped steel sheet pile. It shows the situation where the eccentric bending acts on the erection portion. FIG. 19A is a longitudinal cross-sectional view of a vertical connecting structure in which a plate thickness dimension of a flat plate portion on a central side is larger than a plate thickness dimension of a flat plate portion on an end portion side in an erecting portion. FIG. 19B is a longitudinal cross-sectional view of the erection portion in which the plate thickness size of the flat plate portion on the center side forms a larger longitudinal connection structure than the plate thickness size of the flat plate portion on the end side. 19C is a longitudinal cross-sectional view of the erected portion, the plate thickness dimension of the flat plate portion on the center side forms a larger longitudinal connection structure than the plate thickness dimension of the flat plate portion on the end side. FIG. 20 is a perspective view showing a state in which the erection portion of the vertical connection structure of the embodiment is moved in the plate thickness direction X. FIG. FIG. 21 is a perspective view showing a state in which the mounting portion on which the mounting portion-side protrusion having a slightly trapezoidal or T-shaped cross section is formed is moved in the wall width direction Z. FIG. 22 is a perspective view showing a state in which a wedge-shaped mounting portion-side protrusion and a locked portion are moved in a wall width direction Z. FIG. 23A is a front view showing a plate member subjected to a cutting process. FIG. FIG. 23B is a front view showing a mounting portion subjected to cutting processing. FIG. FIG. 23C is a front view showing the erected portion-side protrusion and the engaged portion inclined toward the wall width direction Z. FIG. FIG. 24A is a front view showing a state where a plate member having a protruding portion and a plate member having a recessed portion are aligned. FIG. 24B is a front view showing a state where the protruding portion is fitted into the recessed portion. FIG. FIG. 25A is a perspective view showing a mounting portion for sliding movement. FIG. FIG. 25B is a perspective view showing a frame member mounted on the mounting portion. 25C is a perspective view showing a state in which both sides of the frame member are sandwiched. FIG. 26A is a front view of a mounting portion provided with a bolt or the like penetrating in the material axis direction Y. FIG. FIG. 26B is a longitudinal sectional view of the erection portion shown in FIG. 26A. FIG. 27A is a perspective view showing a mounting portion for sliding movement. FIG. Fig. 27B is a perspective view showing a latch member attached to the mounting portion. Fig. 27C is a perspective view showing a latch member fitted in the cut groove. Fig. 28 is a plan view showing a bending load acting on a hat-shaped steel sheet pile.

Vertical connection structure of 1‧‧‧ hat-shaped steel sheet pile

2‧‧‧ hat-shaped steel sheet pile

2A‧‧‧The first cap steel sheet pile

2B‧‧‧Second-cap steel sheet pile

3‧‧‧ end

5‧‧‧Erecting Department

7‧‧‧ steel wall

In the site of 8‧‧‧

70‧‧‧ Longitudinal connection cap type steel sheet pile unit

X‧‧‧ thickness direction

Y‧‧‧ material axis direction

Z‧‧‧Wall width direction

Claims (10)

A longitudinal connection structure of a hat-shaped steel sheet pile is a structure in which a first hat-shaped steel sheet pile and a second hat-shaped steel sheet pile are opposed to each other with their end faces in the material axis direction. It is characterized by comprising: a first locked portion protruding outward from a side surface of the first cap-shaped steel sheet pile; and a mounting portion provided on a side surface of the second cap-shaped steel sheet pile and locked in a direction of the material axis The first locked portion of the first cap-shaped steel sheet pile, and the erected portion includes: a flat plate portion fixed to a side surface of the second cap-shaped steel sheet pile; and a protrusion on the side of the erected portion integrally with the flat plate portion. It is formed and protrudes from the flat plate portion to a side surface of the first cap-shaped steel sheet pile, and is locked at the first locked portion in the material axis direction. For example, the longitudinal connection structure of the hat-shaped steel sheet pile of item 1 further includes a second locked portion protruding outward from the side surface of the second hat-shaped steel sheet pile, and the mounting portion is locked in addition to the first In addition to the protruding portion-side protrusion of a locked portion, it further includes: a protruding portion-side protrusion locked on the second locked portion in the direction of the material axis and locked on the second locked portion. The erection portion side protrusion is formed integrally with the flat plate portion, and protrudes from the flat plate portion to a side surface of the second cap-shaped steel sheet pile. For example, the longitudinal connection structure of the hat-shaped steel sheet pile in item 2 of the claim, wherein the end face of the first hat-shaped steel sheet pile and the end face of the first locked portion are in the same plane, and the end face of the second hat-shaped steel sheet pile and The end faces of the second locked portion are in the same plane. The longitudinal connection structure of the hat-shaped steel sheet pile according to any one of claims 1 to 3 Wherein the first locked portion has an extension protrusion extending in the direction of the material axis on a front end side thereof, the mounting portion has a recessed portion, and the recessed portion is directed toward the direction of the material axis and the first cap-shaped steel sheet pile. The plate thickness direction extends in a vertical wall width direction, and is locked to the extending protrusion. For example, the longitudinal connection structure of the hat-shaped steel sheet pile of item 4 further includes a slip prevention portion, which is used to restrain the relative between the erected portion and the first locked portion in the wall width direction. mobile. According to the longitudinal connection structure of the hat-shaped steel sheet pile according to any one of claims 1 to 3, the plurality of first locked portions are spaced apart from each other along the direction of the material axis to provide a plurality of them. For example, the longitudinal connection structure of the hat-shaped steel sheet pile according to item 6, wherein the plurality of first locked portions are integrally provided on a common base material. For example, the longitudinal connection structure of the cap-shaped steel sheet pile according to any one of claims 1 to 3, wherein the portion of the erected portion except the locking portion with the first locked portion is perpendicular to the material. The cross-sectional area when viewed in the axial direction is the largest on the opposing surface of the first cap-shaped steel sheet pile and the second cap-shaped steel sheet pile. A longitudinally connected cap-shaped steel sheet pile unit has the longitudinal connection structure of the cap-shaped steel sheet pile according to any one of claims 1 to 8. The utility model relates to a steel wall, wherein a plurality of steel sheet pile units connected vertically in the item 9 of the claim are arranged in a plurality of wall width directions which are perpendicular to the direction of the material axis and the thickness direction of the first hat-shaped steel sheet pile. : The respective mounting portions of the longitudinally connected cap-shaped steel sheet pile units adjacent to each other in the wall width direction are arranged at positions different from each other in the material axis direction.