Earth retaining wall and method for constructing the wall

Abstract

To provide an earth retaining wall or the like capable of easily fixing a cross-sheet pile to an earth retaining pile or the like mainly by working on the front side of the earth retaining pile or the like. [Solution] The earth retaining wall 1 comprises adjacent earth retaining piles 2, fixing members 4 fixed to the front side of each earth retaining pile 2 and extending laterally from the earth retaining pile 2, splice members 3 arranged in the height direction along each earth retaining pile 2 and fixed to the rear side of the fixing members 4, and cross sheet piles 5 arranged between adjacent earth retaining piles 2 and having both ends fixed to the splice members 3 arranged along each earth retaining pile 2.

Description

[Technical field]

[0001] The present invention relates to an earth retaining wall and a method for constructing the same. [Background technology]

[0002] When excavating the ground, retaining walls are often installed to prevent the surrounding ground from collapsing. The most common method for constructing earth retaining walls is the pile and horizontal sheet pile method. When constructing an earth retaining wall using the pile and horizontal sheet pile method, after driving H-shaped steel earth retaining piles into the ground, the work of excavating the ground and inserting horizontal sheet piles between the earth retaining piles is repeated. The excavated area behind the horizontal sheet piles is filled with backfill material such as backfill soil. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 6994401 Summary of the Invention [Problem to be solved by the invention]

[0004] When constructing an earth retaining wall inside an existing structure, there are cases where a large cavity exists behind the earth retaining piles from the beginning. In this case, the horizontal sheet piles inserted between the earth retaining piles are not held in place because no earth pressure is applied from the back. If workers can enter the cavity on the back side, it may be possible to fix the horizontal sheet piles to the earth retaining wall by working inside the cavity, but there are cases where working inside the cavity is difficult due to space and other issues.

[0005] The present invention has been made in consideration of the above-mentioned problems, and aims to provide an earth retaining wall or the like in which cross sheet piles can be easily fixed to earth retaining piles or the like, mainly by working on the front side of the earth retaining piles or the like. [Means for solving the problem]

[0006] The first invention for achieving the above-mentioned object comprises vertical steel members arranged next to each other, fixing members fixed to the front side of each vertical steel member and extending to the side of the vertical steel members, splice members arranged in the height direction along each vertical steel member and fixed to the rear side of the fixing members, and a horizontal sheet pile arranged between the adjacent vertical steel members and both ends of which are fixed to the splice members arranged along each vertical steel member. The fixing member is disposed so as to bridge between the adjacent vertical steel members. This is an earth retaining wall characterized by the above.

[0007] In the present invention, the splice members arranged in the height direction along the vertical steel members such as earth retaining piles are fixed to the front side of the vertical steel members and to the rear side of the fixing members extending to the side of the vertical steel members, and the ends of the cross sheet piles arranged between the adjacent vertical steel members are fixed to the splice members. This makes it possible to easily fix the cross sheet piles to the vertical steel members by working on the front side of the vertical steel members.

[0008] The fixing member is arranged so as to bridge between adjacent vertical steel members. And This allows the spacing between the vertical steel members to be kept constant by the fixing material.

[0009] At least one of the vertical steel members is a retaining pile. The vertical steel members are typically retaining piles that are driven into the ground or the like.

[0010] The retaining wall is installed inside the existing structure, and at least one of the vertical steel members is fixed to the front side of the existing structure via connecting steel members and is positioned between the existing beams above and below. When constructing a retaining wall inside an existing structure, in places where retaining piles cannot be driven in due to the presence of existing beams, as described above, vertical steel members can be connected to the existing structure and the ends of the cross sheet piles can be fixed to splices installed vertically along the vertical steel members.

[0011] The second invention includes a step of arranging vertical steel members adjacent to each other, a step of fixing a fixing member extending laterally of the vertical steel members to the front side of each vertical steel member, a step of fixing a splice member arranged in the height direction along each vertical steel member to the rear side of the fixing member, and a step of arranging a horizontal sheet pile between the adjacent vertical steel members and fixing both ends of the horizontal sheet pile to the splice member arranged along each vertical steel member. The fixing member is disposed so as to bridge between the adjacent vertical steel members. This is a method for constructing an earth retaining wall, characterized by the above. Effect of the Invention

[0012] According to the present invention, it is possible to provide an earth retaining wall or the like in which cross sheet piles can be easily fixed to earth retaining piles or the like mainly by working on the front side of the earth retaining piles or the like. [Brief description of the drawings]

[0013] [Figure 1] FIG. 2 is a diagram showing an outline of an earth retaining wall 1. [Diagram 2] FIG. 2 is a plan view showing a portion of the earth retaining wall 1. [Diagram 3] A diagram showing the front of the retaining wall 1. [Figure 4] FIG. 2 is a diagram explaining a method for constructing an earth retaining wall 1. [Diagram 5] An example of fixing material 4. [Figure 6] FIG. 4 is a plan view showing a portion of the earth retaining wall 1a. [Figure 7] A diagram showing the front of the retaining wall 1a. [Figure 8] FIG. 2 is a diagram explaining a method of constructing an earth retaining wall 1a. [Figure 9] FIG. 2 is a diagram explaining a method of constructing an earth retaining wall 1a. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

[0015] [First embodiment] Fig. 1 is a diagram showing an outline of an earth retaining wall 1 according to a first embodiment of the present invention. As shown in Fig. 1, the earth retaining wall 1 is provided within an existing structure 6 having an existing wall 61, an existing column 62, an existing beam 63, etc., with the existing wall 61 existing behind it. A cavity 10 is formed between the existing wall 61 and the earth retaining wall 1. Here, "rear (rear side)" refers to the ground side behind the existing structure 6. The opposite side, i.e., the inside side of the existing structure 6, is referred to as "front."

[0016] The earth retaining wall 1 is constructed using the parent pile horizontal sheet pile method, in which horizontal sheet piles 5 are placed between multiple earth retaining piles 2, the details of which will be described later. The earth retaining piles 2 are placed at intervals in the extension direction (corresponding to the normal direction to the paper surface of FIG. 1) in the plane of the existing wall 61, and the horizontal sheet piles 5 are provided in multiple tiers above and below between adjacent earth retaining piles 2.

[0017] Vertical steel materials such as H-shaped steel are used for the earth retaining piles 2. In the example of Fig. 1, a soil cement diaphragm wall S is formed in the foundation ground of the existing structure 6, and the earth retaining piles 2 are formed by extending the core material driven into the soil cement diaphragm wall S upward. In other words, below the existing structure 6, the soil cement diaphragm wall S is provided as an earth retaining wall, and inside the existing structure 6, the earth retaining wall 1 is provided by the parent pile horizontal sheet pile method. However, the present invention is not limited to this, and the earth retaining piles 2 may be directly driven into the foundation ground of the existing structure 6.

[0018] Fig. 2 is a plan view showing a part of the earth retaining wall 1. Fig. 3 is a view showing the front of the earth retaining wall 1 in Fig. 2. As shown in Figs. 2 and 3, the earth retaining wall 1 has the above-mentioned earth retaining piles 2 and cross sheet piles 5, as well as splice materials 3, fixing materials 4, etc.

[0019] The splice members 3 are columnar members used to attach the cross-sheet piles 5, and are arranged in the height direction along both side ends of the flange on the front side of the earth retaining pile 2. Wood is used as the splice member 3, but it is not limited to this.

[0020] The fixing material 4 is a member for attaching the splice material 3 to the earth retaining pile 2. A steel material such as an angle bar is used for the fixing material 4, and it is fixed to the flange on the front side of the earth retaining pile 2 by welding or the like. The fixing material 4 is arranged horizontally in front of the earth retaining piles 2 so as to bridge between adjacent earth retaining piles 2. By fixing the splice material 3 to the rear side of the fixing material 4 with screws 31, the splice material 3 is attached to the earth retaining pile 2 via the fixing material 4.

[0021] The cross sheet pile 5 is a rectangular plate material, and both longitudinal ends thereof are fixed by screws 51 to the splices 3 arranged along the opposing side ends of the flanges of adjacent retaining piles 2 .

[0022] To construct the earth retaining wall 1, first, earth retaining piles 2 are set at a specified interval as shown in Figure 4(a), and then, as shown in Figure 4(b), fixing material 4 is fixed to the flange on the front side of the earth retaining pile 2 by welding or the like.

[0023] Next, as shown in Figure 4(c), splices 3 are placed along both side ends of the flange on the front side of the earth retaining pile 2, and the splices 3 are fixed to the rear side of the fixing material 4 with screws 31. In addition, the distance D between adjacent earth retaining piles 2 is measured at multiple points in the height direction, and the cross sheet piles 5 are cut and processed according to the measurement results.

[0024] In this embodiment, the cross sheet piles 5 are cut so that their length is greater than the maximum value of the interval D, and a marking (not shown) for checking the swallowing length is provided at a position away from both longitudinal ends of the cross sheet piles 5 inward (toward the longitudinal center of the cross sheet piles 5). For example, the length of the cross sheet piles 5 is 100 mm greater than the maximum value of the interval D, and the marking is provided at a position away from both longitudinal ends of the cross sheet piles 5 inward 110 mm, but is not limited to this.

[0025] Thereafter, as shown in Figure 2, a cross sheet pile 5 is placed between adjacent earth retaining piles 2, and both longitudinal ends of the cross sheet pile 5 are fixed with screws 51 to the splice members 3 placed along each earth retaining pile 2. At this time, the dimension from the side end of the flange on the front side of the earth retaining pile 2 to the marking position of the cross sheet pile 5 is measured, and the overlap d of the cross sheet pile 5 to the earth retaining pile 2 is controlled to a specified length (for example, 40 mm or more).

[0026] After the cross sheet piles 5 are fixed, a sealing material (not shown) is applied between the upper and lower cross sheet piles 5 and between the front flange of the earth retaining pile 2 and the splice material 3, and the cavity 10 is filled with a backfill material (not shown). The backfill material is, for example, man-made soil (fluidized soil), sand, soil, etc., but is not limited to these.

[0027] As described above, in this embodiment, the splice material 3 arranged in the height direction along the earth retaining pile 2 driven into the ground or the like is fixed to the front side of the earth retaining pile 2 and fixed to the rear side of the fixing material 4 which extends to the side of the earth retaining pile 2, and the end of the cross sheet pile 5 arranged between adjacent earth retaining piles 2 is fixed to the splice material 3. As a result, the cross sheet pile 5 can be easily fixed to the earth retaining pile 2 by working mainly on the front side of the earth retaining pile 2.

[0028] In this embodiment, the fixing material 4 is disposed so as to bridge between adjacent earth retaining piles 2, and the fixing material 4 can maintain the spacing between the earth retaining piles 2 constant.

[0029] However, the present invention is not limited to the above embodiment. For example, in this embodiment, the fixing material 4 is continuous at the position of the earth retaining piles 2, but as shown in Fig. 5(a), the fixing material 4 may be divided at the position of the earth retaining piles 2 and placed only between a pair of adjacent earth retaining piles 2. Also, in this embodiment, the fixing material 4 is placed so as to bridge between adjacent earth retaining piles 2, but as shown in Fig. 5(b), the fixing material 4 may be a shorter piece and discontinuous between adjacent earth retaining piles 2.

[0030] In this embodiment, the horizontal sheet piles 5 are attached to the earth retaining piles 2, but the vertical steel material to which the horizontal sheet piles 5 are attached is not limited to this. Below, an example in which the vertical steel material to which the horizontal sheet piles 5 are attached is different will be described as the second embodiment. In the second embodiment, differences from the first embodiment will be described, and similar configurations will be denoted by the same reference numerals in the drawings and the like and description thereof will be omitted.

[0031] [Second embodiment] Fig. 6 is a plan view showing a part of an earth retaining wall 1a according to a second embodiment of the present invention. Fig. 7 is a view showing the front of the earth retaining wall 1a of Fig. 6. The earth retaining wall 1a of the second embodiment is an example in which vertical steel members 8 are provided instead of earth retaining piles 2 at locations where earth retaining piles 2 cannot be driven due to the presence of existing beams 63 (see Fig. 1) connected to existing columns 62, thereby reducing the length of cross sheet piles 5 and ensuring the pressure resistance of the earth retaining wall 1a.

[0032] The retaining wall 1a has retaining piles 2, splice materials 3, fixing materials 4, horizontal sheet piles 5, connecting steel materials 7, vertical steel materials 8, etc., and the horizontal sheet piles 5 are arranged between the retaining piles 2 and the vertical steel materials 8.

[0033] The vertical steel members 8 are steel members such as H-shaped steel members arranged vertically, and are provided at plan positions where the existing beams 63 exist. The existing beams 63 are connected to the existing columns 62 located behind the vertical steel members 8. The vertical steel members 8 are fixed to the front side of the existing columns 62 via connecting steel members 7. The vertical steel members 8 are arranged between the upper and lower existing beams 63.

[0034] The connecting steel material 7 is, for example, a steel material such as an angle bar, and is arranged horizontally so as to extend forward from the existing column 62. A fixing piece 71, which is a steel material such as an angle bar arranged vertically, is fixed to one longitudinal end of the connecting steel material 7 by welding or the like. The fixing piece 71 is fixed to the front surface of the existing column 62 using a fixing material such as a chemical anchor 72.

[0035] A support 81 made of steel such as an angle bar is fixed to the rear flange of the vertical steel material 8 by welding or the like, and the other longitudinal end of the connecting steel material 7 is fixed to the support 81 by welding or the like.

[0036] Another support member 82 made of a steel material such as an angle member is fixed by welding or the like to the flange on the front side of the vertical steel material 8. The intermediate portion in the longitudinal direction of the fixing material 4 is fixed to the support member 82 by welding or the like.

[0037] The splices 3 are arranged in the height direction along both side ends of the flange on the front side of the vertical steel material 8. One longitudinal end of the cross sheet pile 5 is fixed to the splice 3 with a screw 51, as in the first embodiment. The splice 3 is also fixed to the fixing material 4 with a screw 31, as in the first embodiment. In this way, one longitudinal end of the cross sheet pile 5 is attached to the vertical steel material 8 via the fixing material 4.

[0038] The other end of the cross sheet pile 5 in the longitudinal direction is attached to the earth retaining pile 2 using the splice material 3 and the fixing material 4 in the same manner as in the first embodiment.

[0039] To construct the earth retaining wall 1a, first, earth retaining piles 2 are installed at a specified interval as shown in Fig. 8(a), and then, as shown in Fig. 8(b), a fixing piece 71 is fixed to the front surface of the existing column 62 by a chemical anchor 72. Then, as shown in Fig. 8(c), one end of the connecting steel material 7 in the longitudinal direction is fixed to the fixing piece 71 by welding or the like.

[0040] Thereafter, as shown in FIG. 9(a), the rear support member 81 of the vertical steel member 8 is fixed to the other longitudinal end of the connecting steel member 7 by welding or the like. As a result, the vertical steel member 8 is fixed to the other end of the connecting steel member 7. The connecting steel members 7 are arranged in multiple tiers, one above the other, and the vertical steel members 8 are fixed to the other end of each connecting steel member 7. The vertical steel members 8 are arranged between the existing beams 63 above and below.

[0041] Next, as shown in Fig. 9(b), the fixing member 4 is placed in front of the vertical steel member 8. The fixing member 4 is fixed to the flange on the front side of the earth retaining pile 2 or to the receiving member 82 on the front side of the vertical steel member 8 by welding or the like.

[0042] Thereafter, as shown in Figure 9(c), splices 3 are placed along both side ends of the flange on the front side of the earth retaining pile 2 and along both side ends of the flange on the front side of the vertical steel material 8, and similarly to the above, these splices 3 are fixed to the rear side of the fixing material 4 with screws 31. Thereafter, similarly to the above, the distance between adjacent earth retaining piles 2 and vertical steel materials 8 is measured, and the cross sheet piles 5 are cut and processed according to the measurement results.

[0043] Thereafter, as shown in Figure 6, a cross sheet pile 5 is placed between adjacent earth retaining piles 2 and vertical steel materials 8. One longitudinal end of the cross sheet pile 5 is fixed with a screw 51 to the splice material 3 on the vertical steel material 8 side. The other longitudinal end of the cross sheet pile 5 is fixed with a screw 51 to the splice material 3 on the earth retaining pile 2 side. After the cross sheet pile 5 is fixed, as described above, sealing material is applied to the gaps between the upper and lower cross sheet piles 5 and between the vertical steel materials 8 and the flanges of the earth retaining pile 2 and the splice material 3, and the cavity 10 is filled with backfill material.

[0044] In the second embodiment, when constructing an earth retaining wall 1a inside an existing structure 6, in a location where an earth retaining pile 2 cannot be driven due to the presence of an existing beam 63, vertical steel members 8 are connected to existing columns 62 of the existing structure 6, and the ends of cross sheet piles 5 can be fixed to splice members 3 provided along the vertical steel members 8. This provides the same effects as the first embodiment. In addition, since the vertical steel members 8 are supported from the rear side of the existing structure 6 (existing columns 62), they do not interfere with work performed on the front side of the earth retaining wall 1a.

[0045] In addition, in the earth retaining wall 1a, reinforcing steel materials (not shown), such as shaped steel or angle members, may be provided between the earth retaining piles 2 and the connecting steel materials 7 to reinforce the support mechanism for the vertical steel materials 8.

[0046] Although the preferred embodiment of the present invention has been described above with reference to the accompanying drawings, the present invention is not limited to such an example. It is clear that a person skilled in the art can come up with various modified or altered examples within the scope of the technical ideas disclosed in this application, and it is understood that such examples also naturally belong to the technical scope of the present invention. [Explanation of symbols]

[0047] 1, 1a: Mountain retaining wall 2: Yamadome pile 3: Adhesive material 4:Fixing material 5: Horizontal arrow board 6: Existing structure 7: Connecting steel material 8: Vertical steel 31, 51: Bis 10: Cavity 61: Existing wall 62: Existing pillar 63: Existing beam

Claims

1. Vertical steel members arranged adjacent to each other; A fixing member fixed to the front side of each vertical steel member and extending laterally from the vertical steel member; A splice material is arranged in the height direction along each vertical steel member and fixed to the rear side of the fixing member; A horizontal sheet pile is arranged between adjacent vertical steel members, and both ends of the horizontal sheet pile are fixed to the splice members arranged along each vertical steel member; Equipped with A retaining wall characterized in that the fixing material is arranged so as to span between adjacent vertical steel materials.

2. The retaining wall according to claim 1, characterized in that at least one of the vertical steel members is a retaining pile.

3. The retaining wall is provided inside the existing structure, The retaining wall according to claim 1, characterized in that at least one of the vertical steel members is fixed to the front side of the existing structure via a connecting steel member and is positioned between the upper and lower existing beams.

4. placing the vertical steel members adjacent to each other; A step of fixing a fixing member extending laterally of each vertical steel member to a front side of the vertical steel member; A step of fixing a splice material arranged in the height direction along each vertical steel material to the rear side of the fixing material; A step of placing a horizontal sheet pile between adjacent vertical steel members and fixing both ends of the horizontal sheet pile to the splice members arranged along each vertical steel member; Equipped with A method for constructing an earth retaining wall, characterized in that the fixing material is arranged so as to bridge between adjacent vertical steel materials.

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