JP6944174B2 - Retaining wall structure - Google Patents

Description

The present invention relates to a retaining wall structure capable of preventing the collapse of cuts, embankments and slopes of the ground, and easily constructing a wall surface or slope having excellent landscape.

Conventionally, in order to prevent the collapse of slopes such as cuts, embankments and grounds, a technique of stacking a plurality of stone cages to construct a leaning retaining wall has been used. The back retaining wall, which is a stack of stone cages, is supported by the back soil in contact with the back soil, and the bottom is supported by the ground, but the front wall has nothing to support, so earth pressure and filling material are used. There is a problem that the wall surface of the front wall portion, which is deformed forward and is flush with the construction, becomes uneven with the passage of time, the appearance is deteriorated, and the retaining wall sinks.

A conventional technique for solving such a problem is described in, for example, Patent Document 1. In this conventional technique, a plurality of wire mesh panels made of welded wire mesh are joined to provide a front portion which is a front wall portion forming a slope, and a bottom portion which is connected to the front portion at an acute angle. The front surface portion is formed in a horizontally long lattice shape by combining a plurality of horizontal bars made of steel bars and vertical bars made of steel bars having a diameter larger than that of the horizontal bars.

By combining the horizontal bar material and the vertical bar material into a horizontally long grid shape in this way, the length of the horizontal side of the grid is increased to, for example, about 10 times the length of the vertical side. The rigidity is increased, the deformation of the front part is suppressed, and the appearance is prevented from being deteriorated.

Japanese Unexamined Patent Publication No. 2011-252330

In the prior art described in Patent Document 1, a horizontally long lattice-shaped front portion is formed by using a steel bar having a diameter larger than that of the horizontal bar, so that deformation of the front portion is suppressed. However, the number of horizontal bars arranged is significantly larger than the number of vertical bars arranged, and it is visually recognized as a metal net-like material having a dense lattice with few gaps in appearance. For this reason, there is a problem that a feeling of strangeness is generated with respect to the surrounding environment and the landscape is deteriorated.

Further, in the prior art of Patent Document 1, since the front surface portion is formed by combining the vertical bar members and the horizontal bar members having different diameters, the nominal diameters of the vertical bar members and the horizontal bar members and the intervals in the vertical and horizontal arrangements. There is a problem that (pitch) is limited and the degree of freedom in design is low.

An object of the present invention is to provide a retaining wall structure capable of easily constructing a retaining wall having a high degree of freedom in design and excellent landscape.

The present invention is a retaining wall structure having a lower retaining wall structure portion constructed on the ground and an upper retaining wall structure portion constructed on the lower retaining wall structure portion.
Each of the lower retaining wall structure and the upper retaining wall structure
The front wall, which consists of multiple metal rods joined in a grid pattern and is inclined to one side with respect to the vertical plane,
A bottom portion composed of a plurality of metal rod-shaped materials joined in a grid pattern, connected to the lower end of the front wall portion and extended to one side thereof, and a bottom portion.
A back portion composed of a plurality of metal rod-shaped materials joined in a grid pattern, the lower end of which is continuous with the side end of the bottom portion on one side, and a back portion arranged in parallel with the front wall portion.
The filling material accommodated between the front wall portion and the back surface portion and on the bottom portion,
A plurality of diagonal tension members made of a metal rod, one end of which is locked to the front wall portion and the other end of which is locked to the bottom portion.
A plurality of horizontal tension members made of a metal rod, one end of which is locked to the front wall portion and the other end of which is locked to the back surface portion.
The lower end of the back surface portion and the rear end portion of the bottom portion on the back surface side are connected so as to be angularly displaceable .
The lower retaining wall structure is
A first portion that extends inclined to one side and constitutes a rod-shaped member of the front wall portion of the lower retaining wall structure portion, and
A second portion that is bent and connected to the lower end of the first portion to form a rod-shaped member at the bottom of the lower retaining wall structure portion, and a second portion.
It has a U-shaped hook portion provided at the upper end of the first portion, and has a U-shaped hook portion.
The upper retaining wall structure is
A third portion that extends inclined to one side and constitutes a rod-shaped member of the front wall portion of the upper retaining wall structure portion, and a third portion.
It has a fourth portion that is bent and connected to the lower end of the third portion and constitutes a rod-shaped member at the bottom portion of the upper retaining wall structure portion.
The retaining wall structure further includes a connecting pin member that is horizontally inserted between the hook portion and the third portion to connect the hook portion and the third portion.

Further, the present invention is characterized in that the filling material is made of a rocky material or a soil material.

Further, the present invention is characterized in that the rod-shaped material is made of an aluminum galvanized iron wire.

According to the present invention, the front wall portion and the bottom portion are connected by a plurality of diagonal tension members, and the front wall portion and the back surface portion are connected by a plurality of horizontal tension members. A part of the load can be applied by a plurality of diagonal tension members and a plurality of horizontal tension members. This eliminates the need for the grid of the front wall portion joined in a grid pattern by a plurality of rod-shaped materials to have a horizontally long grid shape, and makes it possible to realize the front wall portion without making the grid mesh dense. The amount of exposure through the front wall of the filling material can be increased to improve the landscape.

Further, since the load of the front wall portion is reduced by the diagonal tension member and the horizontal tension member, the front wall portion can be realized by using a rod-shaped material such as a steel bar having the same diameter, and the degree of freedom in design is high. The height is high, the assembly work of the front wall portion is simplified, and the retaining wall structure can be easily constructed. Further, since the lower end of the back portion and the end portion on the back side of the bottom portion are connected in an angular displacement manner, the lower end portion of the back portion is positioned with the end portion on the back surface side of the bottom portion in a state where the rear portion can be angularly displaced, and the back portion is positioned. The upper end can be angularly displaced and tilted in a direction close to the front wall portion, and the horizontal tension member can be hooked to the front wall portion and the back surface portion, facilitating the attachment work of the horizontal tension member. Further, since the connecting pin member is horizontally inserted between the hook portion and the third portion to connect the hook portion and the third portion, the front wall and the upper retaining wall structure portion of the lower retaining wall structure portion are connected. It is possible to construct a flush front wall with no steps because it is connected to the front wall of the above and has high rigidity against earth pressure.

Further, according to the present invention, since the filling material is made of a rocky material such as cracked chestnut stone or a soily material, the rocky material or soil material such as cracked chestnut stone is exposed from the lattice of the front wall portion, and is like a stone wall. It is possible to exhibit the appearance of the texture according to the material. As a result, a retaining wall structure having an excellent landscape can be easily realized.

Further, according to the present invention, since the rod-shaped material is made of aluminum galvanized iron wire, a front wall portion having high resistance to corrosion can be realized, whereby the filling material can be held for a long period of time. The service life of the retaining wall structure can be extended.

It is sectional drawing which shows the retaining wall W composed by the retaining wall structure 1a, 1b of one Embodiment of this invention. It is a perspective view which shows the structure of the front wall part 5 and the bottom part 7. It is a side view of the front wall part 5 and the bottom part 7. It is an enlarged view of the connecting part C of the front wall part 5 and the bottom part 7. It is the bottom view which looked at the lid body 3 from the lower part of FIG. It is a side view which looked at the lid body 3 from the lower part of FIG. It is a front view which looked at the back surface 8 of the lower retaining wall structure 1a from the left side of FIG. It is a side view which looked at the back surface 8 of the lower retaining wall structure 1a from the left side of FIG. It is a figure which shows the oblique tension member 10. It is an enlarged view around the hook portions 10b, 10c of the oblique tension member 10. It is a figure which shows the horizontal tension member 11. It is an enlarged view around the hook portions 11b, 11c of the horizontal tension member 11. It is a figure which shows the connection coil 37. It is an enlarged side view which looked at the connection coil 37 from the left side of FIG. It is an enlarged view which shows the connection part between the upper end of the lower back part 8 and the back side end part of the upper bottom part 7, and the connection part between the upper end part of the upper back part 8 and the back side end part of a lid 3. .. It is an enlarged view which shows the connection part between the end part of the bottom part 7 on the back side and the lower end part of a back part 8. It is an enlarged view which shows the connection part between the end part on the back side of a lid body 3 and the upper end part of a back surface part 8.

FIG. 1 is a cross-sectional view showing a retaining wall W composed of retaining wall structures 1a and 1b according to an embodiment of the present invention. In the present embodiment, the term "parallel" refers to parallelism in a substantial sense including errors due to construction tolerances. The retaining wall W is a leaning retaining wall, which is a lower retaining wall structure 1a constructed on the ground 2, an upper retaining wall structure 1b constructed on the lower retaining wall structure 1a, and an upper retaining wall structure 1b. A lid 3 that closes the upper part of the retaining wall structure 1b and a suction material 12 that is laid along the back surfaces of the retaining wall structures 1a and 1b to prevent the outflow of sand or backfilling material 12 such as backfilling earth and sand. It is configured to include the prevention sheet 4. As the backfill material 12, for example, a rocky material such as crushed stone or a soil material such as backfilled earth and sand is used.

Since the lower retaining wall structure 1a and the upper retaining wall structure 1b have substantially the same configuration, the same reference marks are attached to the corresponding parts, and the lower retaining wall structure 1a and the upper retaining wall structure 1a are attached. When the part corresponding to the retaining wall structure 1b is generically described, the subscripts a and b are omitted and referred to as "retaining wall structure 1".

The lower retaining wall structure 1a is composed of a plurality of metal rod-shaped members joined in a grid pattern, and has a grid pattern and a front wall portion 5 arranged so as to be inclined to one side A with respect to the vertical plane 6. It is composed of a plurality of metal rod-shaped materials joined to the bottom portion 7 which is connected to the lower end of the front wall portion 5 and is arranged so as to extend to one side A, and a plurality of metal rod-shaped materials joined in a grid pattern. A back surface portion 8 having a lower end connected to a side end of one side A of the bottom portion 7 and arranged in parallel with the front wall portion 5, and between the front wall portion 5 and the back surface portion 8 and on the bottom portion 7. A plurality of diagonal tension members 10 composed of a contained filling material 9 and a metal rod-shaped material, one end of which is locked to the front wall portion 5 and the other end of which is locked to the bottom portion 7, and a metal rod-shaped material. It is made of a material and includes a plurality of horizontal tension members 11 having one end locked to the front wall portion 5 and the other end locked to the back surface portion 8.

The upper retaining wall structure 1b is configured in the same manner as the lower retaining wall structure 1a except that the diagonal tension member 10 is not used. The skeleton is composed. The filling material 9 is made of split chestnut stone. Further, each rod-shaped member constituting the front wall portion 5, the bottom portion 7, the back surface portion 8, the oblique tension member 10 and the horizontal tension member 11 is made of, for example, an aluminum galvanized iron wire. Thereby, the wall rigidity and durability can be improved. By using split chestnut stone as the filling material 9, high drainage performance can be realized, and a stone-like appearance like a stone wall can be exhibited, and the aesthetic appearance of the design can be improved.

In addition to the above-mentioned split chestnut stone, the filling material 9 may be, for example, boulder or crushed stone. Further, when the wall height is high, concrete may be cast on-site as a filling material 9 in a part or all of the retaining wall W, for example, in a cloth bag.

For reference, the height dimension H and the width dimension B of the upper and lower retaining wall structures 1a and 1b are described. The height dimension H is, for example, 600 mm, and the width dimension B is, for example, 1000 mm. Further, the front wall portion 5 is inclined so as to form a wall surface gradient at an angle θ with respect to the vertical surface 6. This angle θ is, for example, about 25.5 ° when the wall surface gradient is 1: 0.5. These height dimension H and width dimension B are not limited to this, and are appropriately changed depending on the design conditions according to the planned height of the retaining wall W, the wall surface gradient and earth pressure, the bearing capacity, and the like.

FIG. 2 is a perspective view showing the configuration of the front wall portion 5 and the bottom portion 7, FIG. 3 is a side view of the front wall portion 5 and the bottom portion 7, and FIG. 4 is a connecting portion C between the front wall portion 5 and the bottom portion 7. It is an enlarged view of. The front wall portion 5 and the bottom portion 7 are parallel to a plurality of substantially L-shaped rod-shaped members 21 arranged in parallel with a gap L1 from each other and at right angles to each rod-shaped member 21 with a gap L2 and L3 from each other. It has a plurality of rod-shaped members 22 and 23 which are arranged in a row and are joined to each rod-shaped member 21 by welding. These intervals L1 to L3 are, for example, 100 mm to 200 mm, but may include an interval of 100 mm to less than 200 mm depending on the fraction when the dimensions are divided at equal intervals.

Each rod-shaped member 21 is bent and connected to the front wall portion 21a forming the rod-shaped member of the front wall portion 5 at an angle α to the lower end of the front wall portion 21a, and the bottom portion forming the rod-shaped member of the bottom portion 7. It has 21b and. The angle α formed by the front wall portion 21a and the bottom portion 21b is 64.5 ° (= 90 ° −θ), for example, when the wall surface gradient is 1: 0.5.

The front wall portion 21a of each rod-shaped member 21 is joined in a grid pattern by the rod-shaped member 22. Further, the bottom portion 21b of each rod-shaped member 21 is joined in a grid pattern by the rod-shaped member 23. A substantially U-shaped hook portion 24 is formed on the upper portion of the front wall portion 21a in order to insert and connect the front wall portion 21a of the front wall portion 5 of the upper retaining wall structure 1b and the connection pin member 30. Will be done. However, in the upper retaining wall structure 1b, the hook portion 24 at the upper end of the front wall portion 21a of each rod-shaped member 21 of the front wall portion 5 is cut and removed.

FIG. 5 is a bottom view of the lid 3 as viewed from below in FIG. 1, and FIG. 6 is a side view of the lid 3 as viewed from below of FIG. Since there is no retaining wall structure on the retaining wall structure arranged at the uppermost level, that is, on the upper retaining wall structure 1b in the present embodiment, a lid 3 is provided instead of the bottom portion 7. The lid 3 is arranged in parallel with a plurality of substantially J-shaped rod-shaped members 25 arranged in parallel with a space L4 from each other, and each rod-shaped material 25 is arranged at right angles to each rod-shaped material 25 and in parallel with a space L5 from each other. 25 has a plurality of rod-shaped members 26 joined by welding.

Each rod-shaped member 25 is joined in a grid pattern by each rod-shaped member 26. As an example of the combination of the intervals L4 and L5 of the rod-shaped members 25 and 26, the interval L4 is 150 mm and the interval L5 is 200 mm. A substantially U-shaped hook portion 27 is formed at one end of each rod-shaped member 25 in order to insert the rod-shaped member 22a and connect the upper end of the front wall portion 5 and the lid 3.

FIG. 7 is a front view of the back surface portion 8 of the lower retaining wall structure 1a viewed from the left side of FIG. 1, and FIG. 8 is a side view of the back surface portion 8 viewed from the left side of FIG. The back surface portion 8 used for the lower retaining wall structure 1a has a plurality of substantially J-shaped rod-shaped members 28 arranged in parallel with a gap L6 from each other, and a rod-shaped member 28 perpendicular to each rod-shaped member 28 and spaced L7 from each other. It has a plurality of rod-shaped members 29 which are arranged in parallel with each other and are joined to each rod-shaped member 28 by welding.

Each rod-shaped member 28 is joined in a grid pattern by each rod-shaped member 29. As an example of the combination of the intervals L6 and L7 of the rod-shaped members 28 and 29, the interval L6 is 150 mm and the interval L7 is 100 mm. A substantially U-shaped hook portion 31 is formed at one end of each rod-shaped member 28 in order to connect the lower retaining wall structure 1a and the upper retaining wall structure 1b on the back surface side. The substantially U-shaped hook portion 31 is inserted from below into the lattice-shaped opening of the bottom 7 of the upper retaining wall structure 1b, and the hook portion is above the bottom 7 of the upper retaining wall structure 1b. By inserting the rod-shaped member 50 through 31, the lower retaining wall structure 1a and the upper retaining wall structure 1b are connected. The hook portion 31 at the upper end of the upper retaining wall structure 1b is cut and removed, and the rod-shaped member 29a joined to the upper end of the rod-shaped member 28 remaining after cutting, and the rod-shaped member 26a on the backmost side of the lid 3 Is connected by a connecting coil 37.

FIG. 9 is a view showing the oblique tension member 10, and FIG. 10 is an enlarged view of the hook portions 10b and 10c of the oblique tension member 10. The front wall portion 5 and the bottom portion 7 are connected by an oblique tension member 10. The diagonal tension member 10 has a linear straight portion 10a, a substantially U-shaped first hook portion 10b provided at one end of the straight portion 10a, and a substantially V-shaped portion provided at the other end of the straight portion 10a. It has a second hook portion 10c.

The first hook portion 10b intersects the rod-shaped member 22b arranged above the central position in the height direction, that is, in the third step from the bottom in the front wall portion 5 of each retaining wall structure 1. And be locked. The second hook portion 10c is locked at a substantially central portion in the width direction of the rod-shaped member 21 of the bottom portion 7, that is, intersecting and locking the third rod-shaped member 23a from the rod-shaped member closest to the front wall portion 5 in the present embodiment. Will be done. Such diagonal tension members 10 are provided every 4 to 8 rod-shaped members 21 of the front wall portion 5 and the bottom portion 7 in the direction perpendicular to the paper surface of FIG.

FIG. 11 is a view showing the horizontal tension member 11, and FIG. 12 is an enlarged view of the vicinity of the hook portions 11b and 11c of the horizontal tension member 11. The front wall portion 5 and the back surface portion 8 of the lower and upper retaining wall structures 1a and 1b are connected by a horizontal tension member 11. The horizontal tension member 11 has a linear straight portion 11a, a substantially U-shaped first hook portion 11b provided at one end of the straight portion 11a, and a substantially V-shaped portion provided at the other end of the straight portion 11a. It has a second hook portion 11c.

The first hook portion 11b is a rod-shaped member 22b in which the first hook portion 10b of the diagonal tension member 10 described above in the lower retaining wall structure 1a is locked, and a rod-shaped member in the corresponding upper retaining wall structure 1b. It intersects 22b and is locked. The second hook portion 11c is arranged at substantially the same height position as the rod-shaped member 22b of the front wall portion 5 of the rod-shaped members 29 of the back surface portion 8 in both the lower and upper retaining wall structures 1a and 1b. It intersects and is locked with the rod-shaped member 29b to be provided. Such horizontal tension members 11 are provided between the diagonal tension members 10 at every 4 to 6 rod-shaped members 21 and 28 of the front wall portion 5 and the back surface portion 8.

13 is a view showing the connecting coil 37, FIG. 14 is an enlarged side view of the connecting coil 37 as viewed from the left side of FIG. 13, and FIG. 15 is a rear view of the upper end of the lower back portion 8 and the back surface of the upper bottom portion 7. It is an enlarged view which shows the connection part with the side end part, and the connection part between the upper end of the upper back part 8 by the connection coil 37, and the back side end part of a lid body 3. The lower end of the back surface 8 of the upper retaining wall structure 1b and the back end of the upper bottom 7 are connected by a spiral connecting coil 37. Further, the upper end of the upper back surface portion 8 and the end portion on the back surface side of the lid 3 are similarly connected by a spiral connecting coil 37. At the upper end of the lower back surface portion 8, the hook portion 31 of the rod-shaped material 28 intersects the surface of the bottom portion 7 of the upper stage and protrudes upward, and the rod-shaped material 50 is inserted between the protruding portion and the surface of the bottom portion 7. Then, the bottom portion 7 of the upper stage and the upper end of the back surface portion 8 of the lower stage are pulled out. The rearmost rod-shaped member 23a joined to the bottom portion 7 of the upper stage and the rod-shaped member 29c joined to the lowermost end of the back surface portion 8 of the upper stage are connected by a connecting coil 37.

At the upper end of the upper back surface portion 8, the hook portion 31 of the rod-shaped member 28 is cut and removed as described above. The rod-shaped material 29a joined to the uppermost end of the rod-shaped material 28 remaining after cutting and the rod-shaped material 26a joined to the rod-shaped material 25 of the lid 3 on the backmost side are connected by a connecting coil 37.

Such a connecting coil 37 may be formed by bending a steel bar having a diameter of 4 mm in a spiral shape.

FIG. 16 is an enlarged view showing a connection portion between the rear end of the bottom portion 7 and the lower end of the back surface 8 by the connecting coil 37, and FIG. 17 is a rear end and the back surface of the lid 3 by the connecting coil 37. It is an enlarged view which shows the connection part with the upper end of part 8. As described above, the connecting coil 37 connects the rear end of the bottom 7 and the lower end of the back 8, and connects the back end of the lid 3 and the upper end of the back 8. the lower end of the back portion 8 is positioned on the rear side angular displacement freely state to an end of the bottom, the back portion 8 whose upper end is inclined by angular displacement in a direction close to the front wall 5, a horizontal tension member The first hook portion 11b of 11 can be hooked to the rod-shaped member 22b of the front wall portion 5, and the second hook portion 11c can be hooked to the rod-shaped member 29b of the back surface portion 8, facilitating the attachment work of the horizontal tension member 11. Can be transformed into.

As described above, the front wall portion 5 and the bottom portion 7 are connected by the plurality of diagonal tension members 10, and the front wall portion 5 and the back surface portion 8 are connected by the plurality of horizontal tension members 11, so that the front wall portion 5 A part of the load such as earth pressure acting on the above can be applied by the plurality of diagonal tension members 10 and the plurality of horizontal tension members 11. As a result, it is not necessary to lengthen the horizontal side of the grid of the front wall portion 5 joined in a grid pattern by a plurality of rod-shaped members with respect to the length of the vertical side, and the grid is not dense. The front wall portion 5 can be realized, and the amount of exposure of the filling material 9 through the front wall portion 5 can be increased to improve the landscape.

Further, since the load of the front wall portion 5 is reduced by the diagonal tension member 10 and the horizontal tension member 11, the front wall portion 5 can be realized by using a rod-shaped material such as a steel bar having the same diameter. The upper degree of freedom is high, the assembly work of the front wall part is simplified, and the retaining wall structure can be easily constructed.

Further, since the filling material 9 is made of a rocky material such as split chestnut stone or a soily material, the rocky material or soily material such as split chestnut stone is exposed from the lattice of the front wall portion 5, depending on the material such as stone wall. It can exhibit a textured appearance. As a result, a retaining wall structure having an excellent landscape can be easily realized.

Further, since the rod-shaped material is made of aluminum galvanized iron wire, the front wall portion 5 having high resistance to corrosion can be realized, whereby the filling material 9 can be held for a long period of time, and the retaining wall structure can be held. The service life of the product can be extended.

In the above-described embodiment, the retaining wall structures 1a and 1b having two upper and lower stages have been described, but in other embodiments of the present invention, there may be only one stage, or a retaining wall structure having three or more stages may be used. Retaining walls may be constructed.

In still another embodiment, the filling material 9 is housed only behind the front wall portion 5 to a certain thickness, for example, about 500 mm, and behind this thickness of about 500 mm, another filling material, for example, crushed stone. Alternatively, the same effect can be obtained in each of these other embodiments, which may contain a backfilling material such as sand.

1a, 1b Retaining wall structure 2 Ground 3 Lid body 4 Suction prevention sheet 5 Front wall part 6 Vertical surface 7 Bottom part 8 Back part 9 Filling material 10 Diagonal tension member 11 Horizontal tension member 21, 22, 23; 25, 26; 28,29 Rod-shaped material W retaining wall

Claims (3)

A retaining wall structure having a lower retaining wall structure constructed on the ground and an upper retaining wall structure constructed on the lower retaining wall structure.
Each of the lower retaining wall structure and the upper retaining wall structure
The front wall, which consists of multiple metal rods joined in a grid pattern and is inclined to one side with respect to the vertical plane,
A bottom portion composed of a plurality of metal rod-shaped materials joined in a grid pattern, connected to the lower end of the front wall portion and extended to one side thereof, and a bottom portion.
A back portion composed of a plurality of metal rod-shaped materials joined in a grid pattern, the lower end of which is continuous with the side end of the bottom portion on one side, and a back portion arranged in parallel with the front wall portion.
The filling material accommodated between the front wall portion and the back surface portion and on the bottom portion,
A plurality of diagonal tension members made of a metal rod, one end of which is locked to the front wall portion and the other end of which is locked to the bottom portion.
A plurality of horizontal tension members made of a metal rod, one end of which is locked to the front wall portion and the other end of which is locked to the back surface portion.
The lower end of the back surface portion and the rear end portion of the bottom portion on the back surface side are connected so as to be angularly displaceable .
The lower retaining wall structure is
A first portion that extends inclined to one side and constitutes a rod-shaped member of the front wall portion of the lower retaining wall structure portion, and
A second portion that is bent and connected to the lower end of the first portion to form a rod-shaped member at the bottom of the lower retaining wall structure portion, and a second portion.
It has a U-shaped hook portion provided at the upper end of the first portion, and has a U-shaped hook portion.
The upper retaining wall structure is
A third portion that extends inclined to one side and constitutes a rod-shaped member of the front wall portion of the upper retaining wall structure portion, and a third portion.
It has a fourth portion that is bent and connected to the lower end of the third portion and constitutes a rod-shaped member at the bottom portion of the upper retaining wall structure portion.
A retaining wall structure further comprising a connecting pin member that is horizontally inserted between the hook portion and the third portion to connect the hook portion and the third portion. The retaining wall structure according to claim 1, wherein the filling material is made of a rocky material or an earthy material. The retaining wall structure according to claim 1 or 2, wherein the rod-shaped material is made of aluminum galvanized iron wire.

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