Retaining wall structure and construction method of retaining wall structure

Abstract

To provide a retaining wall structure and a construction method for a retaining wall structure in which multiple retaining walls can be arranged in a straight line or curved line, a connecting strength is strong, and construction and partial replacement of a retaining wall are easy.SOLUTION: In a retaining wall structure, a plurality of L-shaped retaining walls 1 are connected by wire-shaped wire ropes 5. Insertion holes 4 are formed in a vertical wall 3 of the L-shaped retaining wall 1. The retaining wall structure is formed by continuously inserting the wire rope 5 in the insertion holes 4 of the neighboring L-shaped retaining walls 1.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a retaining wall structure that receives falling rocks, avalanches, collapsing soil, etc., and a method for constructing the retaining wall structure. [Background technology]

[0002] Conventionally, in precast L-shaped, inverted L-shaped, and inverted T-shaped retaining walls, adjacent walls are connected with connecting fittings to prevent steps and the like from occurring due to earth pressure or ground subsidence (see, for example, Patent Document 1). Although Patent Document 1 does not provide a detailed explanation of the connecting fitting (5), it uses a method in which a plate is provided at the connecting section and adjacent retaining walls are connected with the plate and a bolt.

[0003] Concrete protective retaining walls that protect against falling rocks, avalanches, and soil landslides tend to concentrate the impact on a small number (or a single) of impacted walls. In the case of falling rocks, the rock often hits a single retaining wall, and in such cases, the impact force and energy are absorbed by that single retaining wall, and the amount of impact force and energy that can be absorbed is limited. Therefore, in order to increase the impact force and energy that can be absorbed, it is necessary to connect adjacent retaining walls and integrate them so that the impact force and energy can be absorbed by multiple retaining walls, and the connection of retaining walls is an important element. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Utility Model Application Publication No. 5-96142 Summary of the Invention [Problem to be solved by the invention]

[0005] However, with the above-mentioned method, it can be difficult to align the plates and bolts, which can make the connecting work during construction extremely cumbersome. Also, connecting plates and bolts has the problem of being weak in connection strength against impacts such as falling rocks.

[0006] Furthermore, concrete protective retaining walls are often installed near the boundary between mountain slopes and roads, etc., and so they must be able to be installed in a curved line with multiple walls. Furthermore, if part of a concrete protective retaining wall is damaged by a collision such as falling rocks, the damaged wall must be replaced, so it must be easily replaceable.

[0007] Therefore, the present invention provides a retaining wall structure and a construction method for a retaining wall structure that allows for curved arrangement, has strong connecting strength, and is easy to construct and replace. [Means for solving the problem]

[0008] The retaining wall structure of the present invention is a retaining wall structure in which a plurality of retaining walls are connected by wire-like connectors, and the vertical walls of the retaining walls are Penetrated through the thickness A through hole is formed, and the connecting tool is Extending in the width direction of the retaining wall The retaining wall is characterized in that it is inserted continuously into the insertion holes of the adjacent retaining walls.

[0009] The construction method for a retaining wall structure of the present invention is characterized by comprising the steps of arranging a plurality of retaining walls in a line, inserting connecting devices successively into insertion holes formed in the vertical walls of the retaining walls, and fixing the ends of the connecting devices to the connecting devices or the retaining walls along the wall surfaces of the vertical walls. [Effects of the Invention]

[0010] According to the retaining wall structure of the present invention, multiple retaining walls can be easily and firmly connected. Furthermore, multiple retaining walls can be connected even when they are arranged in a straight line or a curve. Furthermore, even if some of the retaining walls are damaged, the damaged walls can be easily replaced.

[0011] According to the retaining wall structure construction method of the present invention, it is possible to easily construct a retaining wall structure in which a plurality of retaining walls arranged in a linear or curved manner are connected. [Brief explanation of the drawings]

[0012] [Figure 1] This is an oblique view of the mountain side wall surface of the precast L-shaped retaining wall of embodiment 1. [Figure 2] This is an oblique view of the wall surface facing the hillside of the precast L-shaped retaining wall of embodiment 1. [Figure 3] 1A and 1B are explanatory plan views showing the wire rope routing method of embodiment 1, in which (a) the end of the wire rope is fixed on the anti-mountain side, and (b) the end of the wire rope is fixed on the mountain side. [Figure 4] FIG. 10 is an explanatory plan view showing a method for routing a wire rope according to a second embodiment. [Figure 5] FIG. 10 is an explanatory plan view showing a method for routing a wire rope according to a third embodiment. [Figure 6] FIG. 10 is an explanatory plan view showing a method for routing a wire rope according to a fourth embodiment. [Figure 7] FIG. 10 is an explanatory plan view showing a method for routing a wire rope according to a fifth embodiment. [Figure 8] FIG. 13 is an explanatory plan view showing a method for routing a wire rope according to a sixth embodiment. [Figure 9] FIG. 13 is an explanatory plan view showing a method for routing a wire rope according to a seventh embodiment. [Figure 10] FIG. 13 is an explanatory plan view showing a method for routing a wire rope according to the eighth embodiment. [Figure 11] FIG. 13 is an explanatory plan view showing a method for routing a wire rope according to a ninth embodiment. [Figure 12] This is a plan view showing the precast L-shaped retaining wall of embodiment 10 curved toward the mountain side. [Figure 13] This is a plan view showing the precast L-shaped retaining wall of embodiment 10 curved toward the opposite side of the mountain. [Figure 14] An oblique view of the precast L-shaped retaining wall, foam and gabion of embodiment 11. [Figure 15] FIG. 14 is a perspective view of the gabion and suspension wire of embodiment 11. [Figure 16] A side view of the precast L-shaped retaining wall and gabion of embodiment 12. [Figure 17] A partial side view showing a method of connecting a wire rope and a gabion in embodiment 12. [Figure 18] FIG. 22 is an explanatory plan view showing a method for routing the wire rope of embodiment 13. [Figure 19] FIG. 20 is an explanatory plan view showing a method for routing the wire rope of embodiment 14. [Figure 20] FIG. 20 is an explanatory plan view showing a method for routing the wire rope of embodiment 15. DETAILED DESCRIPTION OF THE INVENTION

[0013] Preferred embodiments of the retaining wall of the present invention will be described below with reference to the accompanying drawings. Not all of the configurations described below are essential requirements of the present invention.

[0014] Figures 1 to 3 show a first embodiment of the present invention, and as shown in Figures 1 and 2, a precast L-shaped concrete retaining wall 1 (hereinafter referred to as "L-shaped retaining wall 1"), which is a retaining wall, has a base slab 2 that is placed on the ground or the like, and a vertical wall 3 that stands perpendicular to the base slab 2. The vertical wall 3 has a plurality of insertion holes 4 (four in Figure 2) that are through-holes that penetrate through the thickness direction (front-to-back direction) of the vertical wall 3. Metal wire ropes 5 are inserted into these insertion holes 4. A retaining wall structure is formed by connecting a plurality of L-shaped retaining walls 1 with the wire ropes 5.

[0015] The sole plate 2 has a heel plate 6 that protrudes rearward (toward the mountain side) from the vertical wall 3, and a toe plate 7 that protrudes forward (opposite the mountain side) from the vertical wall 3. The heel plate 6 is formed longer than the toe plate 7.

[0016] The vertical wall 3 is formed in a rectangular shape that is long in the left-right direction in a plan view. The vertical wall 3 has a mountain-side wall surface 8 that faces the mountain side, an opposite-mountain-side wall surface 9 that faces the road or the like on the opposite side from the mountain side, one side wall surface 10, and another side wall surface 11 (see Figure 3, etc.).

[0017] In this embodiment, four insertion holes 4A, 4B, 4C, and 4D are formed in the vertical wall 3 of one L-shaped retaining wall 1. The insertion holes 4A and 4B are located at the same height, and the insertion holes 4C and 4D are located at the same height. Furthermore, the insertion hole 4C is located directly below the insertion hole 4A, and the insertion hole 4D is located directly below the insertion hole 4B. The insertion holes 4A and 4C have the same diameter, length, and shape, and the insertion holes 4B and 4D have the same diameter, length, and shape. The insertion holes 4 may be formed during the manufacture of the L-shaped retaining wall 1 or may be formed at the site where the retaining wall structure is constructed.

[0018] The insertion hole 4A is a hole that linearly penetrates the vertical wall 3 from the mountain side wall surface 8 to the reverse mountain side wall surface 9, with a mountain side opening 12 of the insertion hole 4A formed in the mountain side wall surface 8 and a reverse mountain side opening 13 of the insertion hole 4A formed in the reverse mountain side wall surface 9. The insertion hole 4B is a hole that linearly penetrates the vertical wall 3 from the mountain side wall surface 8 to the reverse mountain side wall surface 9, with a mountain side opening 14 of the insertion hole 4B formed in the mountain side wall surface 8 and a reverse mountain side opening 15 of the insertion hole 4A formed in the reverse mountain side wall surface 9.

[0019] The distance M1 between the mountain-side opening 12 and the mountain-side opening 14 is longer than the distance M2 between the inverted mountain-side opening 13 and the inverted mountain-side opening 15, and the portion surrounded by the mountain-side wall surface 8, the inverted mountain-side wall surface 9, the insertion hole 4A, and the insertion hole 4B has an isosceles trapezoidal shape in plan view. Hereinafter, this portion will be referred to as an isosceles trapezoidal portion 16. Furthermore, the portion surrounded by the mountain-side wall surface 8, the inverted mountain-side wall surface 9, the insertion hole 4B, and one side wall surface 10 of the vertical wall 3 has a right-angled trapezoidal shape in plan view. Hereinafter, this portion will be referred to as a right-angled trapezoidal portion 17. Furthermore, the portion surrounded by the mountain-side wall surface 8, the inverted mountain-side wall surface 9, the insertion hole 4A, and the other side wall surface 11 of the vertical wall 3 has a right-angled trapezoidal shape in plan view. Hereinafter, this portion will be referred to as a right-angled trapezoidal portion 18. The relationship between the insertion holes 4C and 4D is the same as the relationship between the insertion holes 4A and 4B, and therefore will not be described here.

[0020] The wire rope 5, which is a wire-like connector, is formed with a diameter slightly smaller than the diameter of the insertion holes 4A, 4B, 4C, and 4D. As shown in FIG. 3(a), in this embodiment, the wire rope 5 is inserted through the insertion holes 4A and 4B along the upper edge 21 of the isosceles trapezoidal portion 16, the upper edge 22 of the right-angled trapezoidal portion 17, and the upper edge 23 of the right-angled trapezoidal portion 18 of the mountain-side wall surface 8 and the inverted mountain-side wall surface 9. Therefore, the wire rope 5 is bent at an obtuse angle at the mountain-side openings 12 and 14 and the inverted mountain-side openings 13 and 15. The upper edge 21 faces the opposite side of the mountain side, and the upper edge portions 22 and 23 face the mountain side. The wire rope 5 is continuously inserted through the insertion holes 4A and 4B of adjacent L-shaped retaining walls 1 to connect the adjacent L-shaped retaining walls 1 and form a retaining wall structure. The end 24 of the wire rope 5 is fixed to the wire rope 5 along the upper edge 21 of the endmost L-shaped retaining wall 1 with a wire clip 25, which is a fastener. At this time, the wire rope 5 is aligned along one side wall surface 10 and the base 26 of the right-angled trapezoidal portion 17. The other end (not shown) of the wire rope 5 is similarly fixed with a wire clip 25 to the wire rope 5 along the upper edge 21 of the other endmost L-shaped retaining wall 1. At this time, the wire rope 5 is aligned along the other side wall surface 11 and the base 28 of the right-angled trapezoidal portion 18. In this way, multiple L-shaped retaining walls 1 can be connected by the wire rope 5.

[0021] In this embodiment, the wire rope 5 runs along the mountain side wall surface 8 of the L-shaped retaining wall 1 at the upper edge 23 of the right-angled trapezoidal portion 18 and the upper edge 22 of the right-angled trapezoidal portion 17, which are the adjacent parts of the adjacent L-shaped retaining wall 1.

[0022] The number of L-shaped retaining walls 1 connected by one wire rope 5 can be selected as appropriate, and when connecting multiple L-shaped retaining walls 1 connected by wire rope 5 to other L-shaped retaining walls 1, they can be connected using wire rope 5 and wire clip 25.

[0023] FIG. 3(b) shows a modified example of the first embodiment, in which the end 24 of the wire rope 5 is fixed by a wire clip 25 on the mountain-side wall surface 8. This prevents the view of the road or the like from being spoiled from the opposite side of the mountain. In this modified example, the wire rope 5 is inserted through the insertion hole 4A along the upper side 23 of the right-angled trapezoidal portion 18, and routed along the upper side 21 of the isosceles trapezoidal portion 16, the bottom side 26 of the right-angled trapezoidal portion 17, one side wall surface 10, the upper side 22 of the right-angled trapezoidal portion 17, and the bottom side 27 of the isosceles trapezoidal portion 16. The end 24 is fixed by a wire clip 25 to the wire rope 5 along the upper side 23 of the right-angled trapezoidal portion 18. The wire rope 5 is not inserted through the insertion hole 4B.

[0024] FIG. 4 shows a second embodiment in which the method of routing the wire rope 5 is modified from that of the first embodiment. In this embodiment, the wire rope 5 is inserted through the insertion holes 4A and 4B along the base 27 of the isosceles trapezoidal portion 16, the base 26 of the right-angled trapezoidal portion 17, and the base 28 of the right-angled trapezoidal portion 18 of the mountain-side wall surface 8 and the inverted mountain-side wall surface 9. Therefore, the wire rope 5 is bent at acute angles at the mountain-side openings 12 and 14 and the inverted mountain-side openings 13 and 15. The wire rope 5 is continuously inserted through the insertion holes 4A and 4B of adjacent L-shaped retaining walls 1, connecting the adjacent L-shaped retaining walls 1 to form a retaining wall structure. The end 24 of the wire rope 5 is secured to the wire rope 5 along the base 27 of the endmost L-shaped retaining wall 1 with a wire clip 25. At this time, the wire rope 5 is also laid along one side wall surface 10 and the upper edge 22 of the right-angled trapezoidal portion 17. Similarly, the opposite end (not shown) of the wire rope 5 is fixed with a wire clip 25 to the wire rope 5 along the bottom edge 27 of the L-shaped retaining wall 1 at the extreme opposite side. At this time, the wire rope 5 is also laid along the other side wall surface 11 and the upper edge 23 of the right-angled trapezoidal portion 18.

[0025] In this embodiment, the wire rope 5 runs along the inward-facing wall surface 9 of the L-shaped retaining wall 1 at the base 28 of the right-angled trapezoidal portion 18 and the base 26 of the right-angled trapezoidal portion 17, which are the adjacent parts of the adjacent L-shaped retaining wall 1.

[0026] FIG. 5 shows a third embodiment. In this embodiment, the distance M1 between the mountain-side opening 12 and the mountain-side opening 14 is shorter than the distance M2 between the inverted mountain-side opening 13 and the inverted mountain-side opening 15. Therefore, in a plan view, the portion surrounded by the mountain-side wall surface 8, the inverted mountain-side wall surface 9, the insertion hole 4A, and the insertion hole 4B has an isosceles trapezoidal shape. Hereinafter, this portion will be referred to as an isosceles trapezoidal portion 31. Furthermore, the portion surrounded by the mountain-side wall surface 8, the inverted mountain-side wall surface 9, the insertion hole 4B, and one side wall surface 10 of the vertical wall 3 has a right-angled trapezoidal shape in a plan view. Hereinafter, this portion will be referred to as a right-angled trapezoidal portion 32. Furthermore, the portion surrounded by the mountain-side wall surface 8, the inverted mountain-side wall surface 9, the insertion hole 4A, and the other side wall surface 11 of the vertical wall 3 has a right-angled trapezoidal shape in a plan view. Hereinafter, this portion will be referred to as a right-angled trapezoidal portion 33. In this embodiment, the top side 34 of the isosceles trapezoidal portion 31, the bottom side 35 of the right-angled trapezoidal portion 32, and the bottom side 36 of the right-angled trapezoidal portion 33 face the mountain side. Note that the relationship between the insertion holes 4C and 4D is similar to the relationship between the insertion holes 4A and 4B, and therefore will not be described here.

[0027] In this embodiment, the wire rope 5 is inserted through the insertion holes 4A and 4B along the upper edge 34 of the isosceles trapezoidal portion 31, the upper edge 37 of the right-angled trapezoidal portion 32, and the upper edge 38 of the right-angled trapezoidal portion 33 of the mountain-side wall surface 8 and the inverted mountain-side wall surface 9. Therefore, the wire rope 5 is bent at an obtuse angle at the mountain-side openings 12 and 14 and the inverted mountain-side openings 13 and 15. The wire rope 5 is continuously inserted through the insertion holes 4A and 4B of adjacent L-shaped retaining walls 1, connecting the adjacent L-shaped retaining walls 1 to form a retaining wall structure. The end 24 of the wire rope 5 is secured to the wire rope 5 along the upper edge 34 of the endmost L-shaped retaining wall 1 with a wire clip 25. At this time, the wire rope 5 is also routed along the one side wall surface 10 and the base 35 of the right-angled trapezoidal portion 32. Similarly, the opposite end (not shown) of the wire rope 5 is fixed with a wire clip 25 to the wire rope 5 along the upper edge 34 of the L-shaped retaining wall 1 at the opposite end.

[0028] In this embodiment, the wire rope 5 runs along the inward-facing wall surface 9 of the L-shaped retaining wall 1 at the upper edge 38 of the right-angled trapezoidal portion 33 and the upper edge 37 of the right-angled trapezoidal portion 32, which are the adjacent parts of the adjacent L-shaped retaining wall 1.

[0029] FIG. 6 shows a fourth embodiment in which the method of routing the wire rope 5 is modified from that of the third embodiment. In this embodiment, the wire rope 5 is inserted through the insertion holes 4A and 4B along the base 39 of the isosceles trapezoidal portion 31, the base 35 of the right-angled trapezoidal portion 32, and the base 36 of the right-angled trapezoidal portion 33 of the mountain-side wall surface 8 and the inverted mountain-side wall surface 9. Therefore, the wire rope 5 is bent at acute angles at the mountain-side openings 12 and 14 and the inverted mountain-side openings 13 and 15. The wire rope 5 is continuously inserted through the insertion holes 4A and 4B of adjacent L-shaped retaining walls 1, connecting the adjacent L-shaped retaining walls 1 to form a retaining wall structure. The end 24 of the wire rope 5 is fixed to the wire rope 5 along the base 39 of the endmost L-shaped retaining wall 1 with a wire clip 25. At this time, the wire rope 5 is also laid along one side wall surface 10 and the upper edge 37 of the right-angled trapezoidal portion 32. Similarly, the opposite end (not shown) of the wire rope 5 is fixed with a wire clip 25 to the wire rope 5 along the bottom edge 39 of the L-shaped retaining wall 1 at the extreme opposite side. At this time, the wire rope 5 is also laid along the other side wall surface 11 and the upper edge 38 of the right-angled trapezoidal portion 33.

[0030] In this embodiment, the wire rope 5 runs along the mountain side wall surface 8 of the L-shaped retaining wall 1 at the base 36 of the right-angled trapezoidal portion 33 and the base 35 of the right-angled trapezoidal portion 32, which are the adjacent parts of the adjacent L-shaped retaining wall 1.

[0031] FIG. 7 shows a fifth embodiment. In this embodiment, the distance M1 between the mountain-side opening 12 and the mountain-side opening 14 and the distance M2 between the counter-mountain-side opening 13 and the counter-mountain-side opening 15 are the same. Therefore, in a plan view, the portion surrounded by the mountain-side wall surface 8, the counter-mountain-side wall surface 9, the insertion holes 4A, and the insertion holes 4B has a rectangular shape. Hereinafter, this portion will be referred to as a large rectangular portion 41. Furthermore, the portion surrounded by the mountain-side wall surface 8, the counter-mountain-side wall surface 9, the insertion holes 4B, and one side wall surface 10 of the vertical wall 3 has a rectangular shape in a plan view. Hereinafter, this portion will be referred to as a small rectangular portion 42. Furthermore, the portion surrounded by the mountain-side wall surface 8, the counter-mountain-side wall surface 9, the insertion holes 4A, and the other side wall surface 11 of the vertical wall 3 has a rectangular shape in a plan view. Hereinafter, this portion will be referred to as a small rectangular portion 43. The large rectangular portion 41 has a longer longitudinal length than the small rectangular portions 42 and 43. The relationship between the insertion holes 4C and 4D is the same as the relationship between the insertion holes 4A and 4B, and therefore will not be described here.

[0032] In this embodiment, the wire rope 5 is inserted through the insertion holes 4A and 4B so as to alternately run along the mountain-side wall surface 8 and the inverted-mountain-side wall surface 9. The wire rope 5 is inserted through the insertion holes 4A and 4B so as to run along the long side 44 (inverted-mountain-side wall surface 9) of the large rectangular portion 41 opposite the mountain side, the long side 45 (mountain-side wall surface 8) of the small rectangular portion 42, and the long side 46 (mountain-side wall surface 8) of the small rectangular portion 43. Therefore, the wire rope 5 is bent at approximately right angles at the mountain-side openings 12 and 14 and the inverted-mountain-side openings 13 and 15. The wire rope 5 is successively inserted through the insertion holes 4A and 4B of adjacent L-shaped retaining walls 1, connecting the adjacent L-shaped retaining walls 1 to form a retaining wall structure. The end 24 of the wire rope 5 is fixed with a wire clip 25 to the wire rope 5 along the long side 44 of the endmost L-shaped retaining wall 1. At this time, the wire rope 5 is also run along one side wall surface 10 and the long side 47 opposite the mountain side of the small rectangular portion 42. Similarly, the other end of the wire rope 5 (not shown) is fixed with a wire clip 25 to the wire rope 5 along the long side 44 of the endmost L-shaped retaining wall 1 on the other side. At this time, the wire rope 5 is also run along the other side wall surface 11 and the long side 49 opposite the mountain side of the small rectangular portion 43.

[0033] In this embodiment, the wire rope 5 runs along the mountain side wall surface 8 of the L-shaped retaining wall 1 at the mountain side long side 46 of the small rectangular portion 43 and the mountain side long side 45 of the small rectangular portion 42, which are the adjacent parts of the adjacent L-shaped retaining wall 1.

[0034] FIG. 8 shows a sixth embodiment in which the method of routing the wire rope 5 is modified from that of the fifth embodiment. In this embodiment, the wire rope 5 is also inserted through the insertion holes 4A and 4B so as to alternately run along the mountain-side wall surface 8 and the inverted-mountain-side wall surface 9. However, the wire rope 5 is inserted through the insertion holes 4A and 4B so as to run along the long side 48 (mountain-side wall surface 8) of the large rectangular portion 41, the long side 47 (inverted-mountain-side wall surface 9) of the small rectangular portion 42 opposite the mountain side, and the long side 49 (inverted-mountain-side wall surface 9) of the small rectangular portion 43 opposite the mountain side. Therefore, the wire rope 5 is bent at approximately right angles at the mountain-side openings 12 and 14 and the inverted-mountain-side openings 13 and 15. The wire rope 5 is continuously inserted through the insertion holes 4A and 4B of adjacent L-shaped retaining walls 1, connecting the adjacent L-shaped retaining walls 1 to form a retaining wall structure. The end 24 of the wire rope 5 is fixed with a wire clip 25 to the wire rope 5 along the long side 48 of the endmost L-shaped retaining wall 1. At this time, the wire rope 5 is also run along the long side 45 of one side wall surface 10 and the small rectangular portion 42. Similarly, the other end (not shown) of the wire rope 5 is fixed with a wire clip 25 to the wire rope 5 along the long side 48 of the endmost L-shaped retaining wall 1 on the other side. At this time, the wire rope 5 is also run along the other side wall surface 11 and the long side 46 of the small rectangular portion 43.

[0035] In this embodiment, the wire rope 5 runs along the inward-facing wall surface 9 of the L-shaped retaining wall 1 at the inward-facing long side 49 of the small rectangular portion 43 and the inward-facing long side 47 of the small rectangular portion 42, which are adjacent parts of the adjacent L-shaped retaining wall 1.

[0036] 9 shows a seventh embodiment in which one insertion hole 4E is formed in the left-right direction. In a plan view, the portion surrounded by the mountain-side wall surface 8, the inverted mountain-side wall surface 9, the insertion hole 4E, and the one-side side wall surface 10 has a rectangular shape. Hereinafter, this portion will be referred to as a right rectangular portion 51. In addition, in a plan view, the portion surrounded by the mountain-side wall surface 8, the inverted mountain-side wall surface 9, the insertion hole 4E, and the other-side side wall surface 11 also has a rectangular shape. Hereinafter, this portion will be referred to as a left rectangular portion 52.

[0037] In this embodiment, in the vertical wall 3 of one L-shaped retaining wall 1, the wire rope 5 is inserted through the insertion hole 4E so as to follow the hill-side wall surface 8 of the right rectangular portion 51 and the hill-side wall surface 9 of the left rectangular portion 52, and in the vertical wall 3 of the adjacent L-shaped retaining wall 1, the wire rope 5 is inserted through the insertion hole 4E so as to follow the hill-side wall surface 9 of the right rectangular portion 51 and the hill-side wall surface 8 of the left rectangular portion 52. In addition, in the vertical wall 3 of the adjacent L-shaped retaining wall 1, the wire rope 5 is inserted through the insertion hole 4E so as to follow the hill-side wall surface 8 of the right rectangular portion 51 and the hill-side wall surface 9 of the left rectangular portion 52. In other words, a retaining wall structure is formed by connecting multiple L-shaped retaining walls 1 with the wire ropes 5 of adjacent L-shaped retaining walls 1 routed alternately. In this embodiment, the wire rope 5 is bent at approximately right angles at the mountain-side opening 58A of the insertion hole 4E and the opposite-mountain-side opening 58B of the insertion hole 4E. The end 24 of the wire rope 5 is fixed with a wire clip 25 to the wire rope 5 along the opposite-mountain-side wall surface 9 of the left rectangular portion 52 of the endmost L-shaped retaining wall 1. At this time, the wire rope 5 is also run along the one-side side wall surface 10 and the opposite-mountain-side wall surface 9 of the right rectangular portion 51. The other end (not shown) of the wire rope 5 is fixed with a wire clip 25 to the wire rope 5 along the mountain-side wall surface 8 or the opposite-mountain-side wall surface 9 of the right rectangular portion 51 of the opposite endmost L-shaped retaining wall 1. At this time, the wire rope 5 is also run along the other-side side wall surface 11 and the mountain-side wall surface 8 or the opposite-mountain-side wall surface 9 of the left rectangular portion 52.

[0038] In this embodiment, the wire rope 5 alternates between sections along the hillside wall surface 9 of the L-shaped retaining wall 1 on the hillside wall surface 9 of the left rectangular section 52 and the hillside wall surface 9 of the right rectangular section 51, which are adjacent parts of the adjacent L-shaped retaining wall 1, and sections along the hillside wall surface 8 of the L-shaped retaining wall 1 on the hillside wall surface 8 of the left rectangular section 52 and the hillside wall surface 8 of the right rectangular section 51, which are adjacent parts of the adjacent L-shaped retaining wall 1.

[0039] 10 shows an eighth embodiment in which the routing method of the wire rope 5 is modified from that of the seventh embodiment. That is, in the vertical wall 3 of one L-shaped retaining wall 1, the wire rope 5 is inserted through the insertion hole 4E so as to follow the inward-facing wall surface 9 of the right rectangular portion 51 and the upward-facing wall surface 8 of the left rectangular portion 52, and in the vertical wall 3 of the adjacent L-shaped retaining wall 1, the wire rope 5 is inserted through the insertion hole 4E so as to follow the inward-facing wall surface 8 of the right rectangular portion 51 and the upward-facing wall surface 9 of the left rectangular portion 52. In the vertical wall 3 of a further adjacent L-shaped retaining wall 1, the wire rope 5 is inserted through the insertion hole 4E so as to follow the inward-facing wall surface 9 of the right rectangular portion 51 and the upward-facing wall surface 8 of the left rectangular portion 52. That is, a retaining wall structure is formed by connecting a plurality of L-shaped retaining walls 1 with the routing of the wire rope 5 of adjacent L-shaped retaining walls 1 alternating. In this embodiment, the wire rope 5 is bent at approximately right angles at the mountain-side opening 58A and the reverse-mountain-side opening 58B. The end 24 of the wire rope 5 is fixed with a wire clip 25 to the wire rope 5 along the mountain-side wall surface 8 of the left rectangular portion 52 of the endmost L-shaped retaining wall 1. At this time, the wire rope 5 is also run along the one-side side wall surface 10 and the mountain-side wall surface 8 of the right rectangular portion 51. The other end of the wire rope 5 (not shown) is fixed with a wire clip 25 to the wire rope 5 along the mountain-side wall surface 8 or the reverse-mountain-side wall surface 9 of the right rectangular portion 51 of the endmost L-shaped retaining wall 1 on the other side. At this time, the wire rope 5 is also run along the other-side side wall surface 11 and the mountain-side wall surface 8 or the reverse-mountain-side wall surface 9 of the left rectangular portion 52.

[0040] In this embodiment, the wire rope 5 alternates between sections along the mountain side wall surface 8 of the L-shaped retaining wall 1 on the mountain side wall surface 8 of the left rectangular section 52 and the mountain side wall surface 8 of the right rectangular section 51, which are adjacent parts of the adjacent L-shaped retaining wall 1, and sections along the mountain side wall surface 9 of the L-shaped retaining wall 1 on the mountain side wall surface 9 of the left rectangular section 52 and the mountain side wall surface 9 of the right rectangular section 51, which are adjacent parts of the adjacent L-shaped retaining wall 1.

[0041] FIG. 11 shows a ninth embodiment in which four insertion holes 4A, 4B, 4F, and 4G are formed in the left-right direction. In a plan view, the portion surrounded by the crest-side wall surface 8, the inverted crest-side wall surface 9, the insertion hole 4B, and the one-side wall surface 10 has a rectangular shape. Hereinafter, this portion will be referred to as a first rectangular portion 53. Also, in a plan view, the portion surrounded by the crest-side wall surface 8, the inverted crest-side wall surface 9, the insertion hole 4B, and the insertion hole 4G has a rectangular shape. Hereinafter, this portion will be referred to as a second rectangular portion 54. Also, in a plan view, the portion surrounded by the crest-side wall surface 8, the inverted crest-side wall surface 9, the insertion hole 4F, and the insertion hole 4G has a rectangular shape. Hereinafter, this portion will be referred to as a third rectangular portion 55. Also, in a plan view, the portion surrounded by the crest-side wall surface 8, the inverted crest-side wall surface 9, the insertion hole 4A, and the insertion hole 4F has a rectangular shape. Hereinafter, this portion will be referred to as a fourth rectangular portion 56. In addition, in a plan view, the portion surrounded by the crest side wall surface 8, the inverted crest side wall surface 9, the insertion hole 4A, and the other side wall surface 11 has a rectangular shape.

[0042] In this embodiment, in the vertical wall 3 of the L-shaped retaining wall 1, the wire rope 5 is routed along the hill-side wall surface 9 of the first rectangular portion 53, the hill-side wall surface 8 of the second rectangular portion 54, the hill-side wall surface 9 of the third rectangular portion 55, the hill-side wall surface 8 of the fourth rectangular portion 56, and the hill-side wall surface 9 of the fifth rectangular portion 57, and is inserted into the insertion holes 4A, 4B, 4F, and 4G. Therefore, the wire rope 5 is bent at approximately right angles at the hill-side openings 12 and 14, the hill-side opening 59A of the insertion hole 4F, the hill-side opening 60A of the insertion hole 4G, the hill-side openings 13 and 15, the hill-side opening 59B of the insertion hole 4F, and the hill-side opening 60B of the insertion hole 4G. The wire rope 5 is successively inserted through the insertion holes 4A, 4B, 4F, and 4G of adjacent L-shaped retaining walls 1, connecting the adjacent L-shaped retaining walls 1 to form a retaining wall structure. End 24 of wire rope 5 is fixed with wire clip 25 to the wire rope 5 along the mountain side wall surface 8 of the second rectangular portion 54 of the endmost L-shaped retaining wall 1. At this time, the wire rope 5 is also run along the one side wall surface 10 and the mountain side wall surface 8 of the first rectangular portion 53. The other end of wire rope 5 (not shown) is fixed with wire clip 25 to the wire rope 5 along the mountain side wall surface 8 of the fourth rectangular portion 56 of the opposite endmost L-shaped retaining wall 1. At this time, the wire rope 5 is also run along the other side wall surface 11 and the mountain side wall surface 8 of the fifth rectangular portion 57.

[0043] In this embodiment, the wire rope 5 runs along the inward-facing wall surface 9 of the L-shaped retaining wall 1 at the inward-facing wall surface 9 of the fifth rectangular section 57 and the inward-facing wall surface 9 of the first rectangular section 53, which are adjacent parts of the adjacent L-shaped retaining wall 1.

[0044] 12 and 13 show an embodiment 10 in which multiple L-shaped retaining walls 1 are connected and installed in a curved manner. The L-shaped retaining wall 1 shown in FIGS. 12 and 13 has a shape in which the heel plate 6 of the base slab 2 tapers as it moves away from the vertical wall 3. The toe plate 7 is not shown. The L-shaped retaining wall structure shown in FIG. 12 is arranged so that the L-shaped retaining wall 1 bends toward the mountain-side wall surface 8, while the L-shaped retaining wall structure shown in FIG. 13 is arranged so that the L-shaped retaining wall 1 bends toward the mountain-side wall surface 9. As shown in FIGS. 12 and 13, the L-shaped retaining walls 1 may be arranged in a curved manner, as shown in FIGS. 3 to 11, or in a linear manner, as shown in FIGS. 3 to 11. They may also be arranged in a wavy or uneven pattern. Furthermore, a small gap may be left between adjacent L-shaped retaining walls 1. This is because if the gap is narrow enough, large falling rocks and large amounts of earth and sand cannot pass through, preventing damage to roads and other structures on the opposite side of the mountain from falling rocks and landslides. Furthermore, since a small gap is allowed, high precision is not required for positioning when placing the L-shaped retaining wall 1, which has the advantage of making construction extremely easy.

[0045] In Figures 12 and 13, the routing of the wire rope 5 of embodiment 1 shown in Figure 3 is adopted, but the routing of the insertion hole 4 and wire rope 5 of embodiments 2 to 9 shown in Figures 4 to 11 may also be adopted.

[0046] In the first to tenth embodiments shown in Figures 3 to 13, the insertion holes 4 and the wire ropes 5 may be arranged in a single or multiple vertical stages. When multiple stages are arranged, the same insertion holes 4 and wire ropes 5 may all be arranged in the same way, or a combination of the first to ninth embodiments may be used. Furthermore, even in the same stage, different arrangements may be used halfway through, or different arrangements may be used in some sections (ranges). Furthermore, multiple wire ropes 5 may be inserted and arranged through the same insertion hole 4. In this case, the wire ropes 5 may all be arranged in the same way, or a combination of the first to ninth embodiments may be used.

[0047] Here, we will explain how to replace an L-shaped retaining wall 1 when it is damaged by a collision such as a rockfall. First, the wire rope 5 connecting the damaged L-shaped retaining walls 1 is cut at a predetermined position. Then, the wire rope 5 is pulled out of the insertion hole 4, and the damaged L-shaped retaining wall 1 is removed. Next, a new L-shaped retaining wall 1 is placed in the position where the removed L-shaped retaining wall 1 was placed. The wire rope 5 is inserted into the insertion hole 4 of the placed L-shaped retaining wall 1, and the end of the cut wire rope 5 is fixed at a predetermined position on the wire rope 5 with a wire clip 25. If the wire rope 5 is not long enough, a new wire rope 5 can be used. In this way, the wire rope 5 can be fixed at the desired position using the wire clip 25, making it easy to replace some of the L-shaped retaining walls 1 in a retaining wall structure.

[0048] The L-shaped retaining wall 1 may be installed together with a buffer material. Fig. 14 shows an eleventh embodiment in which a buffer is provided on the L-shaped retaining wall 1. Two types of buffer are used: a foam 61 as a first buffer, and a gabion 62 as a second buffer. This buffer can be used in the L-shaped retaining walls 1 of the first to tenth embodiments.

[0049] The foam 61 has a rectangular parallelepiped shape and is used by stacking it vertically in multiple layers (three layers in Figure 14). The number of layers to be stacked vertically can be determined taking into consideration the height of the vertical wall 3 and the size of the foam 61, and it may be one layer. The width (length in the left-right direction) of the foam 61 is formed to be approximately the same as the width (length in the left-right direction) of the L-shaped retaining wall 1. The foam 61 is made of a foamable synthetic resin block, and examples of the foamable synthetic resin include polystyrene foam, polyethylene foam, polypropylene foam, and urethane foam.

[0050] The gabion 62 is a hollow rectangular metal cage 63 containing filler material 64. The cage 63 may be formed from other materials, such as synthetic resin, that have a certain level of strength. Examples of the filler material 64 include stones, soil, or a mixture of stones and soil. When soil is used as the filler material 64, the soil can be placed in flexible cloth bags, and multiple bags containing soil can be packed into the cage 63. Alternatively, a mixture of stones and soil bags can be packed. Furthermore, the mesh of the cage 63 can be blocked with a soil outflow prevention mat (not shown), and the soil or a mixture of stones and soil can be packed inside.

[0051] In this embodiment, the gabions 62 are stacked in six layers, but the number of layers can be determined taking into consideration the height of the vertical wall 3 and the size of the gabions 62, and may be one layer. As will be described later, the upper and lower gabions 62 are connected by connecting members 65 such as wire or clips.

[0052] As shown in Figure 15, a suspending rope 66 is attached to the gabion body 63. The suspending rope 66 is made of a metal wire, and has a looped portion 67 at its upper end. Therefore, when moving the gabion 62, the suspending wire 68 can be hooked and the gabion can be easily lifted using heavy machinery such as a crane.

[0053] The foam 61 is placed on the heel slab 6 of the bottom slab 2 so as to abut against the mountain-side wall surface 8 of the vertical wall 3, and the gabion 62 is placed on the mountain side of the foam 61. The foam 61 is held in place by being sandwiched between the vertical wall 3 and the gabion 62, and the gabion 62 is held in place by its own weight. The foam 61 and the gabion 62 may be connected and fixed to the vertical wall 3 using, for example, a rod-shaped connecting member or the like (not shown).

[0054] Figures 16 and 17 show a twelfth embodiment in which no foam 61 is used as the buffer, but only a gabion 62. In this embodiment, the bottom slab 2 of the L-shaped retaining wall 1 does not have a toe plate 7. The insertion holes 4 are arranged in four rows, one above the other. This embodiment can also employ the wiring of the wire rope 5 in the above-mentioned embodiments 1 to 9 or a combination thereof.

[0055] The gabions 62 are configured in four tiers, one above the other, and adjacent gabions 62 are connected by connecting members 65, and each gabion 62 is connected to the wire rope 5 by the connecting members 65. Therefore, the L-shaped retaining wall 1 and the gabions 62 are integrated, making it possible to absorb impact energy over a wider range and increase the amount of energy that can be handled in the event of falling rocks, etc. It also has the effect of preventing excessive deformation of the cage body 63 due to changes over time, etc.

[0056] In Figure 16, the wire rope 5 and gabion 62 are connected approximately horizontally by a connecting member 65, but by using a wire-shaped connecting member 65, as shown in Figure 17, if the wire rope 5 and gabion 62 are somewhat separated, the connecting member 65 can also be connected so that it is diagonal rather than horizontal.

[0057] Figure 18 shows embodiment 13, which uses an appendage 71 that can be detachably attached to the vertical wall 3. The appendage 71 has a substantially hemispherical shape and has a mounting surface portion 72 that is attached to one side wall surface 10 or the other side wall surface 11 of the vertical wall 3, and a receiving surface portion 73 formed on the side opposite the mounting surface portion 72. The appendage 71 is attached to one side wall surface 10 and the other side wall surface 11 of the L-shaped retaining walls 1 at both ends of a plurality of L-shaped retaining walls 1 arranged side by side. The appendage 71 has a curved shape that bulges out in the direction opposite the vertical wall 3 by being attached to the vertical wall 3 by a mounting bracket or the like (not shown) so that the mounting surface portion 72 abuts against the one side wall surface 10 and the other side wall surface 11.

[0058] If the appendage 71 is not used, the wire rope 5 will bend at approximately a right angle near the corner 74 of the vertical wall 3 (see FIG. 18). This makes the bent portion of the wire rope 5 slightly more susceptible to damage. However, by using the appendage 71 and placing the wire rope 5 along the curved receiving surface 73, the wire rope 5 can be prevented from bending at approximately a right angle. This reduces the risk of damage to the wire rope 5 due to bending. Note that although the appendage 71 in this embodiment is approximately hemispherical, it may have any other shape as long as it reduces the risk of damage to the wire rope 5 due to bending.

[0059] FIG. 19 shows a fourteenth embodiment using an appendage 76 that can be detachably attached to the vertical wall 3. The appendage 76 is a curved plate-like member that, when attached to the vertical wall 3, has a curved shape that bulges out in the direction opposite the vertical wall 3. The appendage 76 is attached to the uphill wall surface 8 and the downhill wall surface 9 of the vertical wall 3 with mounting members 77 such as bolts. By aligning the wire rope 5 along the appendage 76, it is possible to prevent the wire rope 5 from bending at approximately right angles. This reduces the risk of damage to the wire rope 5 due to bending.

[0060] The vertical length of the appendage 76 can be determined appropriately, and it may be formed short in the vertical direction and provided only in the part where the wire rope 5 is attached, or it may be formed long in the vertical direction and multiple wire ropes 5 may be attached.

[0061] 20 shows a fifteenth embodiment using an accessory 81 that can be detachably attached to the vertical wall 3. The accessory 81 is formed by connecting two steel pipes 83 to a steel plate 82 by welding or the like. By attaching the steel plate 82 to one side wall surface 10 or the other side wall surface 11 of the vertical wall 3 of the L-shaped retaining wall 1 at both ends with mounting members 84 such as bolts, the outer surface of the steel pipe 83 has a curved shape that bulges out in the direction opposite to the vertical wall 3.

[0062] By running the wire rope 5 along the steel pipe 83 of the appendage 81, it is possible to prevent the wire rope 5 from bending at approximately right angles. This reduces the risk of damage to the wire rope 5 due to bending. The vertical length of the appendage 81 can be determined appropriately; it may be formed short in the vertical direction and provided only in the portion where the wire rope 5 is to be attached, or it may be formed long in the vertical direction and multiple wire ropes 5 may be attached. Note that round steel may be used instead of the steel pipe 83.

[0063] As described above, the retaining wall structures of Embodiments 1 to 15 are each a retaining wall structure in which a plurality of L-shaped retaining walls 1 are connected by wire ropes 5. Insertion holes 4 are formed in the vertical walls 3 of the L-shaped retaining walls 1, and the wire ropes 5 are successively inserted into the insertion holes 4 of adjacent L-shaped retaining walls 1, thereby easily connecting a plurality of L-shaped retaining walls 1 to form a retaining wall structure. Furthermore, because the wire ropes 5 are used as connectors, the wire ropes 5 can be easily inserted into the insertion holes 4 regardless of whether the L-shaped retaining walls 1 are arranged in a straight line, curved line, wavy line, or uneven manner, making construction of the retaining wall structure easy. Furthermore, some of the L-shaped retaining walls 1 in the retaining wall structure can be easily replaced.

[0064] Furthermore, in the retaining wall structures of embodiments 1 to 15, since the insertion holes 4 penetrate in the thickness direction of the vertical wall 3, the length of the wire rope 5 inserted into one insertion hole 4 is shorter than when, for example, the insertion holes 4 penetrate in the width direction (left and right direction) of the vertical wall 3, making the insertion work much easier.

[0065] Furthermore, in the retaining wall structures mainly of Embodiments 1, 3, 10, and 13 to 15, the wire rope 5 is bent at an obtuse angle at the mountain-side openings 12, 14 and the opposite-mountain-side openings 13, 15 of the insertion hole 4. Therefore, the energy of a falling rock or the like colliding with the retaining wall structure tends to straighten the wire rope 5, and the energy of the collision is transmitted to the wire rope 5 located farther from the collision point, making it possible to absorb a greater amount of collision energy. Furthermore, because the insertion hole 4 is formed in an orientation such that the wire rope 5 forms an obtuse angle at the mountain-side openings 12, 14 and the opposite-mountain-side openings 13, 15 of the insertion hole 4, the wire rope 5 is easily inserted into the insertion hole 4, improving construction efficiency.

[0066] Furthermore, in the retaining wall structures mainly of embodiments 5 to 9 and 13 to 15, the wire ropes 5 are bent at approximately right angles at the mountain-side openings 12, 14, 58A, 59A, and 60A and the reverse-mountain-side openings 13, 15, 58B, 59B, and 60B of the insertion holes 4. In other words, because the insertion holes 4 extend at approximately right angles to the mountain-side wall surface 8 and the reverse-mountain-side wall surface 9, it is easy to arrange reinforcement so that the insertion holes 4 are not formed at the positions of the reinforcing bars in the vertical wall 3. Alternatively, it is easy to form the insertion holes 4 to avoid the positions of the reinforcing bars. The connection strength of multiple L-shaped retaining walls 1 is intermediate between when the wire ropes 5 are bent at an obtuse angle and when they are bent at an acute angle.

[0067] Furthermore, in the retaining wall structures mainly of embodiments 2, 4, and 13 to 15, the wire rope 5 is bent at an acute angle at the mountain side openings 12, 14 and the anti-mountain side openings 13, 15 of the insertion hole 4. Therefore, friction between the L-shaped retaining wall 1 and the wire rope 5 makes it possible to firmly integrate multiple connected L-shaped retaining walls 1.

[0068] In addition, in the retaining wall structures of embodiments 1 to 13 to 15, the ends 24 of the wire ropes 5 are fixed to the wire ropes 5 along the wall surface of the vertical wall 3 by wire clips 25, so that multiple L-shaped retaining walls 1 can be easily integrated together with the wire ropes 5.

[0069] Furthermore, in the retaining wall structures mainly of Embodiments 1, 4, 5, 7, 8, 10, and 13 to 15, the wire rope 5 runs along the mountain-side wall surface 8 of the L-shaped retaining wall 1 in the vicinity of the adjacent L-shaped retaining wall 1. Therefore, when a falling rock or the like strikes the vicinity of the center of the vertical wall 3, the impact force and impact energy can be transmitted to the adjacent L-shaped retaining wall 1 even if the L-shaped retaining wall 1 does not displace significantly. Furthermore, even when a falling rock or the like strikes the vicinity of the adjacent L-shaped retaining wall 1, the impact force and impact energy can be transmitted to the adjacent L-shaped retaining wall 1 even if the L-shaped retaining wall 1 does not displace significantly except in the collision area.

[0070] Furthermore, in the retaining wall structures mainly of embodiments 2, 3, 6, 7, 8, 9, and 13 to 15, in the vicinity of adjacent L-shaped retaining walls 1, the wire rope 5 runs along the hillside wall surface 9 of the L-shaped retaining wall 1. Therefore, even if a falling rock or the like collides with the vicinity of adjacent L-shaped retaining walls 1, the L-shaped retaining wall 1 can firmly receive the falling rock or the like without moving significantly.

[0071] Furthermore, the retaining wall structure of the twelfth embodiment mainly includes a gabion 62, and the gabion 62 is fixed to the wire rope 5. Therefore, the wire rope 5 can be used not only to connect the L-shaped retaining wall 1, but also to connect the gabion 62 to the L-shaped retaining wall 1.

[0072] Furthermore, the retaining wall structures of embodiments 13 to 15 include appendages 71, 76, and 81 that can be attached to the vertical wall 3, and the appendages 71, 76, and 81 have a curved shape that bulges out in the direction opposite to the vertical wall 3. This prevents the wire rope 5 from bending at approximately a right angle, reducing the risk of damage to the wire rope 5 due to bending.

[0073] In addition, the construction method of the retaining wall structure of embodiments 1 to 15 includes the steps of arranging multiple L-shaped retaining walls 1 in a line, continuously inserting wire ropes 5 through insertion holes 4 formed in the vertical walls 3 of the arranged L-shaped retaining walls 1, and fixing the ends 24 of the wire ropes 5 to the wire ropes 5 along the wall surfaces of the vertical walls 3 (mountain side wall surface 8, anti-mountain side wall surface 9) or to the L-shaped retaining walls 1, thereby making it possible to easily construct the retaining wall structure by connecting multiple L-shaped retaining walls 1 arranged in a straight, curved, wavy or uneven manner with the wire ropes 5.

[0074] In the present invention, "retaining wall" includes protective retaining walls, concrete retaining walls, precast concrete retaining walls, L-shaped retaining walls, inverted L-shaped retaining walls, and inverted T-shaped retaining walls. Also, "wire-like connectors" include wire ropes, fiber ropes, wires, and chains, and multiple wires may be used.

[0075] The present invention is not limited to the above-described embodiments, and various modifications are possible without departing from the spirit of the present invention. For example, in each of the above-described embodiments, the end 24 of the wire rope 5 is fixed to the wire rope 5 with the wire clip 25, but the end 24 of the wire rope 5 may be fixed directly to the L-shaped retaining wall 1 (vertical wall 3) using another fixing device. In other words, it is sufficient that the wire rope 5 inserted into the insertion hole 4 is held attached to the L-shaped retaining wall 1. [Explanation of symbols]

[0076] 1 Precast L-shaped retaining wall (retaining wall) 3 Vertical Wall 4 Insertion hole 4A Insertion hole 4B Insertion hole 4C Insertion hole 4D insertion hole 4E Insertion hole 4F insertion hole 4G insertion hole 5 Wire rope (connector) 8 Mountain side wall (wall) 9. Wall facing the hill (wall) 12 Mountain side opening (opening) 13 Opposite side opening (opening) 14 Mountain side opening (opening) 15 Opposite side opening (opening) 24 End 25 Wire clip (fixing device) 58A Mountain side opening (opening) 58B Opposite side opening (opening) 59A Mountain side opening (opening) 59B Opposite side opening (opening) 60A Mountain side opening (opening) 60B Opposite side opening (opening) 61 Foam (buffer material) 62 Gabion (buffer material) 71 appendages 72 Mounting surface 73 Receptacle part

Claims

1. A retaining wall structure in which a plurality of retaining walls are connected by wire-like connectors, A through hole is formed in the vertical wall of the retaining wall, penetrating in the thickness direction, A retaining wall structure characterized in that the connecting device is extended in the width direction of the retaining wall and inserted continuously into the insertion holes of adjacent retaining walls.

2. A retaining wall structure as described in Claim 1, characterized in that the connecting devices are extended alternately along the mountain side wall surface and the reverse mountain side wall surface of the retaining wall.

3. 2. The retaining wall structure according to claim 1, wherein the connector is bent at an obtuse angle at the opening of the insertion hole.

4. 2. The retaining wall structure according to claim 1, wherein the connector is bent at a substantially right angle at the opening of the insertion hole.

5. 2. The retaining wall structure according to claim 1, wherein the connector is bent at an acute angle at the opening of the insertion hole.

6. 2. The retaining wall structure according to claim 1, wherein an end of the connector is fixed to the connector along the wall surface of the vertical wall by a fastener.

7. A retaining wall structure according to any one of claims 1 to 6, characterized in that the connectors are arranged along the mountain side wall surfaces of the adjacent retaining walls in the adjacent portions of the adjacent retaining walls.

8. A retaining wall structure as described in any one of claims 1 to 6, characterized in that the connectors are arranged along the inward-facing wall surfaces of the adjacent retaining walls in the adjacent portions of the adjacent retaining walls.

9. A buffer member is provided, The retaining wall structure according to any one of claims 1 to 6, characterized in that the buffer member is fixed to the connector.

10. A retaining wall structure described in any one of claims 1 to 6, characterized in that it is provided with an appendage that can be attached to both widthwise ends of the vertical wall and prevents the connecting device from bending at approximately right angles.

11. placing a plurality of retaining walls side by side; A step of continuously inserting connectors into insertion holes formed in the vertical walls of the retaining wall that has been placed; A construction method for a retaining wall structure described in any one of claims 1 to 5, characterized in that it includes a step of fixing an end of the connector to the connector or the retaining wall along the wall surface of the vertical wall.

Images