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WO2013008905A1 - Palfeuille composite, mur souterrain continu et procédé de réutilisation de palfeuille composite - Google Patents

Palfeuille composite, mur souterrain continu et procédé de réutilisation de palfeuille composite Download PDF

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Publication number
WO2013008905A1
WO2013008905A1 PCT/JP2012/067900 JP2012067900W WO2013008905A1 WO 2013008905 A1 WO2013008905 A1 WO 2013008905A1 JP 2012067900 W JP2012067900 W JP 2012067900W WO 2013008905 A1 WO2013008905 A1 WO 2013008905A1
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WIPO (PCT)
Prior art keywords
sheet pile
steel sheet
replacement
joining
combined
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2012/067900
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English (en)
Japanese (ja)
Inventor
亮祐 永津
滋樹 寺崎
豊島　径
哲也 赤星
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Steel Corp
Original Assignee
Nippon Steel and Sumitomo Metal Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Steel and Sumitomo Metal Corp filed Critical Nippon Steel and Sumitomo Metal Corp
Priority to CN201280033698.6A priority Critical patent/CN103649417B/zh
Priority to JP2013523994A priority patent/JP5413541B2/ja
Publication of WO2013008905A1 publication Critical patent/WO2013008905A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
    • E02D31/002—Ground foundation measures for protecting the soil or subsoil water, e.g. preventing or counteracting oil pollution

Definitions

  • the present invention relates to a combined steel sheet pile, an underground continuous wall, and a method for reusing a combined steel sheet pile used to construct earth retaining walls, retaining walls, foundation structures and the like in the field of civil engineering and construction.
  • Patent Document 1 discloses a steel pipe sheet pile in which a small-diameter steel pipe is attached as a joint to a large-diameter steel pipe as a steel material for a continuous underground wall that can cope with such a problem and has excellent cross-sectional rigidity.
  • Patent Document 2 discloses a combination steel sheet pile in which an H-shaped steel is joined to a linear steel sheet pile in which the shapes of the left and right joints are asymmetric.
  • Patent Document 3 as shown in FIGS. 26A to 27B, a combined steel sheet pile 101 in which an H-section steel 130 is joined to a steel sheet pile 110 having a cross-sectional hat shape in which the shapes of the left and right joints 111 are asymmetric is disclosed. Yes.
  • this combination steel sheet pile 101 joins the H-section steel 130 to the steel sheet pile 110, the welded portion W is used as shown in FIGS. 26A and 27A, or the joint bolt 141 and the joint bolt 141 are used as shown in FIGS. 26B and 27B.
  • a joining nut 145 is used.
  • the entire steel sheet pile 110 and the joint 111 are deformed and damaged during the placing work and the drawing work of the combined steel sheet pile 101. Deformation is likely to occur in the full width W1 of the steel sheet pile 110 and the opening width W2 of the joint 111.
  • the existing steel sheet pile 110 which is easily deformed is removed from the existing H-shaped steel 130 which is difficult to be deformed and damaged, and a new steel sheet pile 110 is
  • a concept of exchanging the steel sheet pile 110 of the combined steel sheet pile 101 by performing the work of attaching and detaching the steel sheet pile 110 to be joined to the existing H-shaped steel 130.
  • the conventional combined steel sheet pile 101 is configured by joining a steel sheet pile 110 and an H-shaped steel 130 having the same length in the longitudinal direction. Yes. For this reason, in the conventional combination steel sheet pile 101, it is necessary to replace the steel sheet pile 110 over the entire length including a portion that can be reused with relatively little deformation and damage. Thus, there was room for improvement from the viewpoint of economy.
  • the welding bead (welding) Part W) etc. need to be removed by a grinder process or the like. That is, the longer the overall length of the combined steel sheet pile 101, the longer the working time and man-hours required for replacing the steel sheet pile 110, leading to a reduction in economy and workability.
  • the present invention has been devised in view of the above-described problems, and its object is to attach the steel sheet pile when the combined steel sheet pile is reused by replacing the steel sheet pile.
  • An object of the present invention is to provide a combined steel sheet pile, an underground continuous wall, and a method for reusing the combined steel sheet pile that can improve workability and economical efficiency at the time of removal work.
  • the present invention employs the following modes in order to solve the above-described problems and achieve the object.
  • One aspect of the present invention is a combined steel sheet pile comprising a steel sheet pile and an H-shaped steel, wherein the steel sheet pile has a plurality of sheet pile members that are divided perpendicularly to the longitudinal direction, The sheet pile member at at least one end in the longitudinal direction is a replacement sheet pile member that can be attached to and detached from the H-shaped steel.
  • the steel sheet pile when viewed in a cross section perpendicular to the longitudinal direction, is a pair of steel sheet pile flange portions provided at both ends of the web portion, A hat-shaped steel sheet pile having a hat shape having an arm portion provided at the tip of the steel sheet pile flange portion and a joint provided at the tip of the arm portion may be used.
  • the length of the longitudinal direction of the replacement sheet pile member is 50 cm or more, and the length of the steel sheet pile in the longitudinal direction. May be 0.2 times or less.
  • the combined steel sheet pile according to any one of (1) to (3) may further include a joining bolt for joining the H-shaped steel and the replacement sheet pile member.
  • the replacement sheet pile member includes a plurality of the joining bolts, and the H-shaped steel is attached to the H-shaped steel flange portion. There may be a plurality of bolt insertion holes through which the joining bolts for joining are inserted, and the number of the joining bolts may be equal to or less than the number of the bolt insertion holes.
  • the combined steel sheet pile according to any one of (1) to (3) may further include a welded portion that joins between the H-shaped steel and the replacement sheet pile member.
  • a water stop layer including a swellable water stop material is provided between the replacement sheet pile member and the sheet pile member. It may be provided.
  • the underground continuous wall in which the combined steel sheet pile according to any one of (1) to (7) is used has a plurality of combined steel sheet piles, and the adjacent steel sheet piles adjacent to each other It may be constructed by connecting joints to each other.
  • the method for reusing a combined steel sheet pile constituting the underground continuous wall according to (8) above includes a step of pulling out the combined steel sheet pile constituting the underground continuous wall from the ground, and the combined steel sheet pile The step of removing the sheet pile member for replacement from and the step of attaching another sheet pile member for replacement to the combined steel sheet pile from which the sheet pile member for replacement has been removed may be included.
  • the replacement sheet pile member can be replaced simply by removing and attaching the joining bolt and the joining nut. Therefore, it is possible to shorten the work time required for attaching / detaching the replacement sheet pile member.
  • the replacement sheet pile member can be replaced simply by cutting the weld. Therefore, it is possible to shorten the work time required for the drilling operation of the bolt insertion hole for the replacement sheet pile member and the H-shaped steel and the tightening operation of the joining bolt and the joining nut.
  • FIG. 1B is a partial cross-sectional plan view in which a part of FIG. 1A is enlarged. It is a front view of the combination steel sheet pile which concerns on 1st Embodiment. It is a partial cross-section rear view of FIG. 2A. It is a front view of the upper end part of the combination steel sheet pile which concerns on 1st Embodiment. It is a partial cross-section rear view of the upper end part of FIG. 3A. It is a front view of the sheet pile member for exchange of the combination steel sheet pile concerning a 1st embodiment.
  • FIG. 5A It is a side view which shows roughly the underground continuous wall constructed
  • FIG. 11B is a partial cross-sectional plan view enlarging a part of FIG. 11A. It is a figure which shows roughly the underground structure constructed
  • FIG. 18A shows the relationship between the joint opening width of the steel sheet pile calculated
  • It is a partial cross section rear view which shows a state when eight joining bolts are used for joining with a H-section steel and the sheet pile member for replacement
  • It is a fragmentary sectional rear view which shows a state when six joining bolts are used for joining to H-section steel and a sheet pile member for exchange.
  • FIG. 18A It is a rear view of the upper end part of the combination steel sheet pile of FIG. 18A. It is a side view which shows roughly the underground continuous wall constructed
  • the combined steel sheet pile 1 includes a steel sheet pile 10 and an H-shaped steel 30 joined to the steel sheet pile 10 as shown in FIGS. 1A to 4B.
  • the combined steel sheet pile 1 is used to construct the underground continuous wall 3 in the ground.
  • the underground continuous wall 3 is driven into the ground in a state where a plurality of combined steel sheet piles 1 are connected to each other via a joint 11 provided on the steel sheet pile 10.
  • the underground continuous wall 3 includes a plurality of combination steel sheet piles 1 and is constructed by connecting joints 11 of the combination steel sheet piles 1 adjacent to each other.
  • the combined steel sheet pile 1 is driven into the ground by a known drive device such as a hydraulic presser or a vibro hammer.
  • the steel sheet pile 10 is provided at the joint 11 provided at both ends in the plate width direction and at the center portion in the plate width direction when viewed in a cross section perpendicular to the longitudinal direction. And a web portion 13.
  • the steel sheet pile 10 is provided with a web portion 13 (steel sheet pile web portion) provided at the center in the plate width direction and inclined from both ends of the web portion 13 toward one side of the web portion 13.
  • a pair of flange portions 15 (steel sheet pile flange portions), an arm portion 17 provided so as to be parallel to the web portion 13 from the tip of the flange portion 15, and a joint 11 provided at the tip of the arm portion 17; It is comprised as a hat-shaped steel sheet pile with.
  • the pair of flange portions 15 are provided so as to be separated from each other as they are separated from the web portion 13.
  • the steel sheet pile 10 includes a web portion 13 provided at the center portion in the plate width direction and both ends of the web portion 13 as shown in FIG. You may be comprised as a U-shaped steel sheet pile which has a pair of flange part 15 inclined and provided toward the single side
  • the shape of the joint 11 is adjusted so that it can be mutually fitted to the joint 11 of the other steel sheet pile 10. Moreover, the shape of the joint 11 is adjusted so that it may not detach
  • FIG. Adjacent steel sheet piles 10 are connected by fitting the joints 11 to each other.
  • the H-shaped steel 30 has a web portion 31 (H-shaped steel web portion) and a pair of flange portions 33 (H-shaped steel flange portions) provided at both ends of the web portion 31.
  • the H-section steel 30 is joined by overlapping one flange portion 33 (H-shaped steel flange portion) on one surface of the web portion 13 (steel sheet pile web portion) of the steel sheet pile 10.
  • the H-shaped steel 30 is provided on one side opposite to the concave portion 16 formed by the web portion 13 (steel sheet pile web portion) of the steel sheet pile 10 and the pair of flange portions 15 (steel sheet pile flange portions).
  • the flange portion 33 (H-shaped steel flange portion) is overlapped and joined.
  • the H-shaped steel 30 is joined by overlapping one flange portion 33 on one side of the concave portion 16 formed by the web portion 13 and the pair of flange portions 15 of the steel sheet pile 10. May be.
  • the steel sheet pile 10 which concerns on this embodiment is comprised from the several sheet pile members 21 and 23 of the shape divided
  • the steel sheet pile 10 according to this embodiment includes three sheet pile members 21 and 23.
  • the sheet pile members 21 and 23 are made of a steel material.
  • the plurality of sheet pile members 21, 23 function as one steel sheet pile 10 by being joined to the H-section steel 30 in a state of being continuously arranged in the same direction in the longitudinal direction of the H-section steel 30. .
  • the at least one sheet pile member 21 of the upper end portion 10 a and the lower end portion 10 b on both sides in the longitudinal direction of the steel sheet pile 10 is configured as a replacement sheet pile member 23 that can be attached to and detached from the H-section steel 30.
  • a steel sheet pile 10 having a joint 11 provided at both end portions in the plate width direction and a web portion 13 provided in the center portion in the plate width direction;
  • the steel sheet pile 10 is a combination steel sheet pile 1 including an H-section steel 30 joined to the web portion 13 of the steel sheet pile 10 by overlapping the flange portion 33, and the steel sheet pile 10 is divided perpendicularly to the longitudinal direction.
  • the sheet pile member 21 of the at least one end in the longitudinal direction is a replacement sheet pile member 23 that can be attached to and detached from the H-section steel 30.
  • exchange is illustrated.
  • FIG. 10A and FIG. 10B at least any one should just be comprised as the sheet pile member 23 for replacement
  • the replacement sheet pile member 23 is provided for the purpose of replacing with a new replacement sheet pile member 23 when the existing replacement sheet pile member 23 is deformed when the combined steel sheet pile 1 is reused. .
  • the replacement sheet pile member 23 is joined to the H-section steel 30 so as to be detachable in order to improve workability at the time of detachment work for replacement.
  • exchange is bolt-joined with respect to the H-section steel 30 by screwing the joining nut 45 with respect to the joining bolt 41 is illustrated.
  • the combination steel sheet pile 1 is further provided with the joining bolt 41 and the joining nut 45 which join between the H-section steel 30 and the sheet pile member 23 for replacement
  • the steel sheet pile 10 of the combined steel sheet pile 1 is an area where the upper end portion 10a and the lower end portion 10b are particularly susceptible to deformation and damage. This is because the lower end portion 10b of the steel sheet pile 10 is likely to come into contact with an underground object such as a cobblestone or the like during the placement work of the combined steel sheet pile 1, and is easily deformed or damaged by the contact. Further, the upper end portion 10a of the steel sheet pile 10 is a portion where the driving force from the driving device is transmitted by being gripped by the driving device when the combined steel sheet pile 1 is driven or pulled out with a vibro hammer or the like. is there. Therefore, it is easy to be deformed and damaged by a load from the driving device during the driving operation.
  • the upper end portion 10a and the lower end portion 10b of the steel sheet pile 10 are easily deformed and damaged as compared with other portions due to the influence of various loads such as earth pressure.
  • at least one sheet pile member 21 of the upper end portion 10 a and the lower end portion 10 b of the steel sheet pile 10 is provided as a replacement sheet pile member 23.
  • the deformation referred to here is such that the longitudinal axis of the steel sheet pile 10 bends in the plate width direction, warps such that the longitudinal axis deviates in the plate thickness direction, and in the plate width direction of the steel sheet pile 10. And the like, and the opening of the joint 11 of the steel sheet pile 10.
  • the term “damage” as used herein refers to scraping or seizing of the joint 11 of the steel sheet pile 10, partial cracking, cutting, or the like of the steel sheet pile 10.
  • the replacement sheet pile member 23 is configured as a short sheet pile member 21 having a shorter length in the longitudinal direction than the sheet pile member 21 disposed in the middle portion 10e of the steel sheet pile 10 in the longitudinal direction.
  • the plurality of sheet pile members 21 are composed of a short sheet pile member as the replacement sheet pile member 23 and a long sheet pile member having a longer length in the longitudinal direction than the short sheet pile member.
  • all the replacement sheet pile members 23 are configured as short sheet pile members, and the portions other than the replacement sheet pile member 23 are configured as long sheet pile members.
  • the sheet pile member 21 other than the replacement sheet pile member 23 is not particularly limited with respect to the joining means to the H-section steel 30, unlike the sheet pile member 23 for replacement.
  • this joining means for example, a bolt, a drill screw, or the like is used in addition to joining by a welded portion W such as fillet welding as in the present embodiment.
  • the replacement sheet pile member 23 is disposed on the upper end portion 10a and the lower end portion 10b of the steel sheet pile 10 with a small acting bending moment and shearing force. Therefore, when constructing the underground continuous wall 3, the function of connecting with the adjacent combined steel sheet piles 1, and earth and sand from one side of the steel sheet pile 10 toward the other side when constructed as the underground continuous wall 3. It is sufficient if the function of preventing leakage can be exhibited. And it is not necessary to have the function to bear the rigidity as the underground continuous wall 3. On the other hand, the H-shaped steel 30 needs to be adjusted with respect to dimensions such as its plate thickness so that the rigidity as the underground continuous wall 3 can be secured.
  • the continuous underground wall 3 having the configuration shown in FIGS. 9A and 9B as a modification of the present embodiment is preferable because the rigidity on the end side from the cut surface 74 is improved.
  • the replacement sheet pile member 23 is disposed on the upper end portion 10a and the lower end portion 10b of the steel sheet pile 10, all the replacement sheet pile members 23 are short sheet pile members, and the parts other than the replacement sheet pile member 23 are long. It is the same as the above that it is configured as a shawl sheet member.
  • the combination steel sheet piles 1 having different lengths in the longitudinal direction of the replacement sheet pile members 23 are alternately arranged. Specifically, as shown in FIGS.
  • the continuous underground wall 3 has a plurality of combination steel sheet piles 1 having replacement sheet pile members 23x and 23y having different lengths in the longitudinal direction.
  • the combination steel sheet piles 1 having the replacement sheet pile members 23x and 23y having different lengths in the longitudinal direction may be adjacent to each other, and the joints 11 of these combination steel sheet piles 1 adjacent to each other may be connected to each other.
  • the combination steel sheet pile 1 having the replacement sheet pile member 23y having a shorter length in the longitudinal direction than the replacement sheet pile member 23x is combined with the replacement sheet pile member 23x. Adjacent to and connected to the steel sheet pile 1.
  • the boundary 74 between the sheet pile member 21 and the replacement sheet pile members 23x and 23y may cause stress concentration, and in addition, the main cause of the decrease in rigidity at the upper end portion 10a and the lower end portion 10b of the combined steel sheet pile 1 It becomes. (Because no force is transmitted between the sheet pile member 23 for replacement and the sheet pile member 21 at the upper end 10a and the lower end 10b, the hat-shaped steel sheet pile cannot be considered as a structural member.) FIG. 9A and FIG. 9B In the continuous underground wall 3, the boundary part 74 does not continue between the adjacent combination steel sheet piles 1. FIG. And since the boundary part 74 is united with the joint 11 of the combination steel sheet pile 1 which adjoins, stress concentration does not arise easily.
  • the steel sheet pile 10 which has arrange
  • the rigidity is preferably improved.
  • the joining bolt 41 is disposed so that the bolt head 42 is positioned on the outer surface 23a side of the replacement sheet pile member 23. Thereby, as will be described later, it is possible to improve the workability at the time of attaching / detaching the replacement sheet pile member 23.
  • the joining bolt 41 may be arranged such that the bolt head 42 is positioned on the inner surface 23b side of the replacement sheet pile member 23.
  • the joining bolt 41 is fixed to the outer surface 23 a of the replacement sheet pile member 23.
  • a fixing jig 51, a welded portion W, or the like as described below is used as means for fixing the joining bolt 41 in this way.
  • the fixing jig 51 is provided so as to overlap the outer surface 23a of the replacement sheet pile member 23.
  • the fixing jig 51 is made of a resin material or the like in addition to a metal material such as a steel material.
  • the fixing jig 51 is formed with a fitting hole 53 having a shape corresponding to the bolt head 42 of the joining bolt 41.
  • the joining bolt 41 is arranged such that the bolt head 42 is fitted into the fitting hole 53 of the fixing jig 51.
  • the fitting hole 53 of the fixing jig 51 is formed in a shape that allows the outer peripheral surface of the joining bolt 41 to be engaged with the inner peripheral surface of the fitting hole 53 when the joining bolt 41 is about to rotate.
  • the fitting hole 53 of the fixing jig 51 is formed in a hexagonal shape.
  • the fitting hole 53 of the fixing jig 51 is moved by the friction between the outer peripheral surface of the bolt head 42 and the inner peripheral surface of the fitting hole 53 due to the axial movement of the joining bolt 41 fitted inside.
  • the outer peripheral surface of the bolt head 42 and the inner peripheral surface of the fitting hole 53 are in contact with each other so as to be restrained.
  • a cap for closing the fitting hole 53 of the fixing jig 51 from the outside may be installed.
  • the joining bolt 41 is fixed to the outer surface 23a of the replacement sheet pile member 23 so that its rotation and axial movement are restricted.
  • the fixing jig 51 of this embodiment is fitted with the bolt heads 42 of different joining bolts 41 in the plurality of fitting holes 53 formed in the fixing jig 51 so as not to rotate integrally with the joining bolts 41.
  • the fixing jig 51 may be joined to the outer surface 23a of the replacement sheet pile member 23 by welding or the like. .
  • the joining bolt 41 is configured to be fixed to the outer surface 23a of the replacement sheet pile member 23, the workability at the time of attaching / detaching the replacement sheet pile member 23 can be improved as described later. It becomes possible.
  • the combined steel sheet pile 1 is transported to the location that is the work site.
  • the replacement sheet pile member 23 and the combined steel sheet pile 1 from which the replacement sheet pile member 23 has been removed may be separately transported to the site, or those previously integrated at the factory or the like are transported to the site. May be.
  • the underground continuous wall 3 is constructed in the ground using a plurality of combined steel sheet piles 1.
  • the construction method of the underground continuous wall 3 is not particularly limited, and a known method may be appropriately used. An example of the construction method of the underground continuous wall 3 will be described.
  • the combined steel sheet pile 1 is placed in advance in the ground. Subsequently, in the state where the joint 11 of the steel sheet pile 10 of the preceding combination steel sheet pile 1 and the joint 11 of the steel sheet pile 10 of the subsequent combination steel sheet pile 1 are fitted and connected to each other, the subsequent combination steel sheet piles are connected. Place 1 in the ground. By repeating this operation, the underground continuous wall 3 is constructed as shown in FIGS. 5A, 5B, and 6.
  • the underground continuous wall 3 After the underground continuous wall 3 is constructed, a post-process required according to the use of the underground continuous wall 3 is performed. Below, the subsequent process will be described by taking as an example a case where an underground structure is constructed using the underground continuous wall 3 according to the present embodiment as a temporary retaining wall.
  • the underground continuous wall 3 is placed in advance so as to surround the construction position of the underground structure 5. Then, after excavating the ground within the range surrounded by the plurality of underground continuous walls 3, the cut beams 7 are erected in a plurality of stages in the vertical direction between the opposing underground continuous walls 3, and then the underground structure The object 5 is constructed and the work is completed.
  • the plurality of combined steel sheet piles 1 constituting the underground continuous wall 3 are pulled out from the underground and removed.
  • the work of pulling out the combined steel sheet pile 1 is performed by a known drive device such as a vibro hammer.
  • the underground continuous wall 3 is used as a temporary retaining wall as described above, when the combined steel sheet pile 1 is pulled out, first the cut beam 7 is removed, and then the underground continuous wall 3 and the underground structure 5 are removed. After being backfilled with excavated soil or the like, the combined steel sheet pile 1 is pulled out from the ground.
  • the existing replacement sheet pile member 23 is removed from the pulled out combined steel sheet pile 1.
  • the existing replacement sheet pile member 23 is removed, only the existing replacement sheet pile member 23 that is largely deformed or damaged may be removed from the existing replacement sheet pile member 23.
  • the existing replacement sheet pile member 23 is removed by loosening the joint bolt 41 and the joint nut 45 that bolt the replacement sheet pile member 23 to the H-shaped steel 30. To remove.
  • the replacement sheet pile member 23 may be removed from the H-section steel 30 by cutting the welded portion W.
  • the combination is performed at the time of attaching / detaching the replacement sheet pile member 23. It is preferable to place the steel sheet pile 1 on the ground 8. Thereby, it becomes possible to place the combined steel sheet pile 1 on the ground 8 in a stable state and suppress the deformation thereof.
  • the joining bolt 41 is fixed to the outer surface 23a of the replacement sheet pile member 23.
  • the replacement sheet pile member 23 is to be attached and detached, it is only necessary to perform the operation from the inner surface 23b side of the replacement sheet pile member 23 without performing the reversal operation of the combined steel sheet pile 1. That is, it becomes possible to loosen and remove one of the joining bolt 41 and the joining nut 45 from the other, and to improve the workability at the time of attaching / detaching.
  • a joining nut 45 may be disposed on the outer surface 23a of the replacement sheet pile member 23 instead of the joining bolt 41, and the joining nut 45 may be fixed to the outer surface 23a of the replacement sheet pile member 23 by welding or the like.
  • the existing sheet pile member 21 other than the replacement sheet pile member 23 is attached to the existing H-shaped steel 30, and the combined steel sheet pile 1 is Reuse.
  • the combined steel sheet pile 1 with the replacement sheet pile member 23 removed is stored.
  • the combined steel sheet pile 1 is transported to the site and reused by attaching a new replacement sheet pile member 23 to the combined steel sheet pile 1.
  • the attachment timing may be at the time of storage of the combined steel sheet pile 1 or the combined steel sheet pile 1 to the field. It may be after carrying.
  • a new replacement sheet pile member 23 may be attached at the work site to reuse the combined steel sheet pile 1.
  • the above-described method for reusing the combined steel sheet pile 1 according to this embodiment will be summarized.
  • the method for reusing the combined steel sheet pile 1 according to the present embodiment includes a step of pulling out the combined steel sheet pile 1 constituting the underground continuous wall 3 from the ground, and a step of removing the replacement sheet pile member 23 from the combined steel sheet pile 1. And attaching the other replacement sheet pile member 23 to the combined steel sheet pile 1 from which the replacement sheet pile member 23 has been removed.
  • the combined steel sheet pile 1 can be reused only by partially replacing the steel sheet pile 10, it is possible to shorten the work time required for attaching / detaching the replacement sheet pile member 23.
  • the replacement sheet pile member 23 can be replaced simply by removing and attaching the joining bolt 41 and the joining nut 45, it is possible to shorten the work time required for the attaching and removing work of the replacement sheet pile member 23.
  • the combined steel sheet pile 1 can be reused only by transporting the new replacement sheet pile member 23 to the storage location or work site of the combined steel sheet pile 1. Since this replacement sheet pile member 23 is short with respect to the total length of the combined steel sheet pile 1 and can be stacked and transported, it is possible to improve workability during the transport operation. .
  • the inventor actually constructed the underground continuous wall 103 using a conventional combined steel sheet pile 101 as shown in FIGS. 26A and 27A, for example, and then combined steel sheet pile 101 constituting the underground continuous wall 103. And a confirmation test for confirming how much the steel sheet pile 110 of the pulled combination steel sheet pile 101 is deformed.
  • the confirmation test the full width W1 of the steel sheet pile 110 that most affected the fitting property and the placing property of the combined steel sheet pile 101 and the opening width W2 of the joint 111 of the steel sheet pile 110 were measured.
  • the full width W1 and opening width W2 of each before and after the combination steel sheet pile 101 was put in the ground were measured.
  • FIGS. 15A and 15B are diagrams showing the relationship between the full width W1 obtained by the confirmation test and the distance from the upper end of the steel sheet pile 110.
  • FIG. 16A and 16B are diagrams showing the relationship between the joint opening width W2 and the distance from the upper end of the steel sheet pile 110.
  • the replacement sheet pile member 23 has a length L 1 in the longitudinal direction of 0.2 mm relative to the length L 0 in the longitudinal direction of the steel sheet pile 10. It is preferable that the length is not more than twice (20% or less). Thereby, it is possible to replace only the easily deformable portion (replacement sheet pile member 23) while leaving as much as possible the portion where the deformation of the steel sheet pile 10 hardly occurs (the sheet pile member 21). Therefore, when the combined steel sheet pile 1 is reused, the amount of steel used can be more effectively suppressed. Further, the lower limit value of the length L 1, is not particularly limited.
  • the steel sheet pile 10 is, for example, one having a longitudinal length L 0 of 10 m to 50 m.
  • exchange is provided in both the upper end part 10a and the lower end part 10b of the steel sheet pile 10
  • the sheet pile member 23 for both the upper end part 10a and the lower end part 10b is each longitudinal direction.
  • the length L 1 is formed in a substantially same length.
  • the H-section steel 30 has a plurality of bolt insertion holes 34 drilled in an end portion 33 a of a flange portion 33 (H-shape steel flange portion) on which the replacement sheet pile member 23 is overlaid. Preferably it is.
  • the plurality of bolt insertion holes 34 indicates the number of the joining bolts 41 for the bolt joining. It is provided so that it can be adjusted within the range of the number. Therefore, it becomes possible to adjust the joining strength of the replacement sheet pile member 23 to the H-shaped steel 30.
  • the combined steel sheet pile 1 has a plurality of joining bolts 41 and joining nuts 45, and the H-shaped steel 30 is inserted into the joining bolt 41 that joins the replacement sheet pile member 23 to the flange portion 33.
  • the bolt insertion hole 34 is provided, the number of the joining bolts 41 and the joining nuts 45 is equal to or less than the number of the bolt insertion holes 34, and the number of the joining bolts 41 and the joining nuts 45 is within the range of the number of the bolt insertion holes 34. It is preferable to adjust the strength at which the H-section steel 30 and the replacement sheet pile member 23 are joined. Thereby, when a new sheet pile member 23 for replacement is bolted to the H-section steel 30, the necessary joint strength is ensured without newly drilling a bolt insertion hole 34 for the H-section steel 30. Is possible.
  • the plurality of bolt insertion holes 34 are bolt insertion holes so that the number and positions of the joining bolts 41 used for joining the H-section steel 30 and the replacement sheet pile member 23 can correspond to various variations. It is preferable to keep the interval between 34 as small as possible.
  • the plurality of bolt insertion holes 34 are arranged in a row at a substantially constant interval in the longitudinal direction, and a plurality of rows of the bolt insertion holes 34 are formed.
  • the joining bolts 41 inserted into the plurality of bolt insertion holes 34 are arranged in the plate width direction of the steel sheet pile 10 as a set, and are equally spaced in the longitudinal direction. It may be inserted into the bolt insertion hole 34 at the vacant position.
  • the bolt insertion hole 34 to be used is shifted and zigzag form (a state arrange
  • the necessary joint strength here means earth pressure applied to the upper end portion 10a and the lower end portion 10b of the steel sheet pile 10 when the temporary earth retaining wall (underground continuous wall 3) is constructed using the combined steel sheet pile 1. It is a joint strength that can sufficiently resist bending moment and shear force acting by water pressure. This bending moment and shear force are derived by design or the like. This bending moment and shearing force change variously according to the ground conditions around the combined steel sheet pile 1 placed in the ground and the structural conditions of the cutting beam 7 and the like.
  • the replacement sheet pile member 23 and another sheet pile member 21 adjacent thereto are provided. It is good also as making it the structure where the reinforcement board 61 was constructed over one side or both surfaces. Thereby, since the integrity of the sheet pile member 23 for replacement
  • the boundary part 74 does not continue between the adjacent combination steel sheet piles 1, and the combined steel with which the boundary part 74 adjoins. Since it joins with the joint 11 of the sheet pile 1, the joining strength in the upper end part 10a and the lower end part 10b improves preferably.
  • the reinforcing plate 61 is made of a metal material such as a steel material or a synthetic resin material. In the modification of the present embodiment shown in FIGS. 18A to 18C, the reinforcing plate 61 is installed on both surfaces of the pair of flange portions 15 of the replacement sheet pile member 23 and the other sheet pile member 21 adjacent in the longitudinal direction. Yes.
  • the reinforcing plate 61 is joined to the replacement sheet pile member 23 and other sheet pile members 21 by bolt joining as shown in the figure, or by a welded portion W such as fillet weld.
  • the combined steel sheet pile 1 has a swellable water stop material at a boundary portion 74 between the replacement sheet pile member 23 and another sheet pile member 21 adjacent thereto.
  • 72 is provided.
  • a water stop layer 71 including a swellable water stop material 72 is provided between the sheet pile member 23 for replacement and the sheet pile member 21 (boundary portion 74).
  • the water-stopping layer 71 is provided by applying a swellable water-stopping material 72 on one or both of the facing surfaces 22 of the replacement sheet pile member 23 and another sheet pile member 21 adjacent thereto. It is done.
  • the swellable water-stopping material 72 is mainly composed of, for example, a urethane resin, and expands by absorbing moisture in the ground and can exhibit high water-stopping properties.
  • the water stop layer 71 uses the combined steel sheet pile 1 according to the present embodiment as a temporary retaining wall, a plurality of boundaries between the sheet pile member 21 and the replacement sheet pile member 23 that may cause water leakage. You may provide only in the location exposed to the excavation side among the parts 74. FIG. If it demonstrates in the example shown in FIG. 19, the water stop layer 71 should just be provided only in the boundary part 74 by the side of the upper end part 10a among the two boundary parts 74 in a longitudinal direction.
  • the combined steel sheet pile 1 according to the present embodiment is different from the combined steel sheet pile 1 according to the first embodiment in the structure of the fitting hole 53 of the fixing jig 51 as shown in FIG.
  • the bolt shaft portion 43 of the joining bolt 41 is inserted in order from the H-shaped steel 30 side in the penetration direction of the fitting hole 53 to the replacement sheet pile member 23 side.
  • the large-diameter hole 53b is inserted with a bolt head 42 or a joint nut 45 of the joint bolt 41, and has an inner periphery that can be engaged with the outer peripheral surface of the bolt head 42 or the joint nut 45 of the joint bolt 41. A surface is formed.
  • the fixing jig 51 is sandwiched between the bolt head 42 or the joining nut 45 of the joining bolt 41 and the replacement sheet pile member 23 by tightening one of the joining bolt 41 and the joining nut 45. Will be fixed. Thereby, it becomes unnecessary to join the fixing jig 51 to the outer surface 23a of the sheet pile member 23 for replacement by welding, adhesion, magnetic adhesion, or the like.
  • the H-section steel 30 and the replacement sheet pile member 23 are joined by a weld W as shown in FIGS.
  • the combined steel sheet pile 1 further includes a welded portion W that joins between the H-section steel 30 and the replacement sheet pile member 23. Only this joining method is different from the combined steel sheet pile 1 according to the first embodiment.
  • Other points include, for example, replacing the damaged sheet pile member 23 from the combined steel sheet pile 1, a method of constructing the underground continuous wall 3 using the combined steel sheet pile 1, and the underground continuous wall 3. The method of withdrawing and reusing the combined steel sheet pile 1 is the same as in the case of the first embodiment.
  • the replacement sheet pile member 23 is removed from the H-section steel 30 by cutting the welded portion W from the longitudinal end to the boundary portion 74. . Therefore, it is not necessary to drill the bolt insertion hole 34 for the replacement sheet pile member 23 and the H-shaped steel 30. Further, it is not necessary to fix the fixing jig 51 or the like to the replacement sheet pile member 23 by welding or the like, and it is not necessary to tighten the joining bolt 41 and the joining nut 45. In this way, the work time required for the above can be shortened. Moreover, in FIG. 23A and FIG.
  • FIG. 24A is a plan view showing the underground continuous wall 3 using the combined steel sheet pile 1 according to the fifth embodiment of the present invention.
  • FIG. 24B is a front view of the underground continuous wall 3 shown in FIG. 24A.
  • the combined steel sheet pile 1 of this embodiment has a steel sheet pile 10 that is a cold-rolled steel sheet pile formed by cold rolling.
  • This steel sheet pile 10 cannot be made into a complicated shape like a hot-rolled steel sheet pile formed by hot rolling with high shape imparting property as in the first embodiment.
  • a cold-rolled steel sheet pile that can be manufactured with simple equipment can be used as the steel sheet pile 10.
  • each modification of the first embodiment can also be applied to this embodiment.
  • FIG. 25A is a plan view showing the underground continuous wall 3 using the combined steel sheet pile 1 according to the sixth embodiment of the present invention.
  • FIG. 25B is an enlarged plan view of the combined steel sheet pile 1 used for the underground continuous wall 3 shown in FIG. 25A.
  • the steel sheet pile 10 has two Z-shaped steel sheet piles 10x, a joint 11x of one Z-shaped steel sheet pile 10x, and a joint 11y of the other Z-shaped steel sheet pile 10x.
  • the steel sheet pile 10 has two Z-shaped steel sheet piles 10x, a joint 11x of one Z-shaped steel sheet pile 10x, and a joint 11y of the other Z-shaped steel sheet pile 10x.
  • a hat-shaped steel sheet pile having a hat shape when viewed in a cross section perpendicular to the longitudinal direction.
  • the joint 11x and the joint 11y at both ends in the plate width direction are not the same shape.
  • the shape of the steel sheet pile 10 is a hat shape.
  • each modification of the first embodiment can be applied.
  • the exchange sheet pile member 23 for which the combination steel sheet pile 1 was damaged, the method of constructing the underground continuous wall 3 using the combination steel sheet pile 1, and the combination steel sheet pile 1 from the underground continuous wall 3 The method of extracting and reusing is the same as in the case of the first embodiment.
  • an example using the conventional combined steel sheet pile 101 as shown in FIGS. 26A and 27A (hereinafter referred to as a comparative example) and an example using the combined steel sheet pile 1 as shown in FIGS. 1A to 2B, for example.
  • the combined steel sheet piles 1 and 101 used in both the comparative example and the invention example are steel sheet piles 10 and 110, a hat of type 10H having a total width of 936 mm (effective width 900 mm), an effective height of 230 mm, and a plate thickness of 10.8 mm.
  • a shaped steel sheet pile was used.
  • the H-shaped steels 30 and 130 those having a girder height of 700 mm, a girder width of 200 mm, a web thickness of 9 mm, a flange thickness of 19 mm, and a longitudinal length of 18 m were used.
  • the longitudinal length L 1 of the replacement sheet pile member 23 of both the upper end portion 10 a and the lower end portion 10 b of the steel sheet pile 10 is equal to the longitudinal length L 0 of the steel sheet pile 10. What was formed so that it might become 20% (0.2 times) of this was used.
  • Table 1 shows the cumulative amount of steel used for each of Invention Example 1 and Comparative Example.
  • Table 2 shows the cumulative amount of steel used in Invention Example 2 and Comparative Example.
  • Invention Example 1 when reused a total of four times, Invention Example 1 can reduce the amount of accumulated steel used by 31% as compared with the Comparative Example. Moreover, as shown in Table 2, on the condition that only the replacement sheet pile member 23 of the lower end portion 10b of the steel sheet pile 10 is replaced, the invention example 2 can reduce the accumulated steel material usage amount by 42% as compared with the comparative example. It becomes. From these results, it can be confirmed that the amount of steel used can be greatly reduced when the combined steel sheet pile 1 is reused by the above-described aspect of the present invention.

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  • Engineering & Computer Science (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Hydrology & Water Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Bulkheads Adapted To Foundation Construction (AREA)

Abstract

Cette invention concerne une palfeuille composite comprenant une palfeuille et une poutrelle d'acier en H soudées l'une à l'autre. Ladite palfeuille comprend de multiples éléments de palfeuille séparés perpendiculairement au sens de la longueur. L'élément de palfeuille situé à une extrémité dans le sens de la longueur est un élément de palfeuille de remplacement qui peut être attaché et détaché de la poutrelle d'acier en H.
PCT/JP2012/067900 2011-07-14 2012-07-13 Palfeuille composite, mur souterrain continu et procédé de réutilisation de palfeuille composite Ceased WO2013008905A1 (fr)

Priority Applications (2)

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CN201280033698.6A CN103649417B (zh) 2011-07-14 2012-07-13 组合钢板桩、地下连续壁以及组合钢板桩的再利用方法
JP2013523994A JP5413541B2 (ja) 2011-07-14 2012-07-13 組合せ鋼矢板、地中連続壁、及び組合せ鋼矢板の再利用方法

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JP2011-155710 2011-07-14
JP2011155710 2011-07-14

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JP2017066702A (ja) * 2015-09-30 2017-04-06 新日鐵住金株式会社 鋼矢板の縦継構造及び鋼矢板壁
JP2017155425A (ja) * 2016-02-29 2017-09-07 新日鐵住金株式会社 鋼矢板壁
CN113756321A (zh) * 2021-08-31 2021-12-07 山东大学 一种地铁车站基坑临时构件全回收支护体系及施工方法
JP2023069014A (ja) * 2021-11-04 2023-05-18 株式会社奥村組 土留め壁の構築方法

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JP6524450B2 (ja) * 2016-08-08 2019-06-05 日本製鉄株式会社 鋼製部材の縦継構造
US10995467B2 (en) * 2018-10-19 2021-05-04 J.D. Fields & Company, Inc. Combined wall piling system

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WO2017038629A1 (fr) * 2015-08-28 2017-03-09 新日鐵住金株式会社 Structure d'articulation verticale de palfeuilles de type chapeau, unité de palfeuilles de type chapeau assemblées verticalement, et rideau en acier
JPWO2017038629A1 (ja) * 2015-08-28 2018-05-10 新日鐵住金株式会社 ハット型鋼矢板の縦継構造、縦継ハット型鋼矢板ユニット、及び鋼製壁
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JP2017155425A (ja) * 2016-02-29 2017-09-07 新日鐵住金株式会社 鋼矢板壁
CN113756321A (zh) * 2021-08-31 2021-12-07 山东大学 一种地铁车站基坑临时构件全回收支护体系及施工方法
JP2023069014A (ja) * 2021-11-04 2023-05-18 株式会社奥村組 土留め壁の構築方法
JP7589947B2 (ja) 2021-11-04 2024-11-26 株式会社奥村組 土留め壁の構築方法

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JPWO2013008905A1 (ja) 2015-02-23
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CN103649417A (zh) 2014-03-19
CN103649417B (zh) 2015-10-07
TW201307640A (zh) 2013-02-16

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