JP2975285B2 - Girder girder retaining wall - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cross beam retaining wall.

[0002]

2. Description of the Related Art Conventionally, as one form of a girder retaining wall, a pair of front and rear concrete cross beams extending in the longitudinal direction of the retaining wall and a plurality of concrete stays extending in a direction intersecting both the horizontal beams are known. There is a construction in which materials are alternately stacked and assembled in a cross-girder shape.

[0003]

However, since the above-mentioned cross beam retaining wall is formed by assembling a cross beam made of concrete and a stay member made of concrete in a cross beam shape, the retaining wall is entirely formed. Although it is built firmly, it does not bend, so it can not cope with uneven settlement of the ground or pitch and roll of the ground at the time of the earthquake, and there is a problem that stress concentration occurs in some parts and it is easy to collapse is there.

[0004] In the construction work of the girder girder retaining wall,
Since each girder is made of concrete and the weight of each girder is large, a transport device is required for transportation.However, in restoration work on a hillside that has only sidewalks, the transport device cannot be carried in There is a problem that has to be transported.

Further, since each girder member is made of concrete, if the ground at the construction site of the retaining wall is weak, the retaining wall cannot be constructed.

[0006]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a method of forming a pair of front and rear cross beams extending in the longitudinal direction of a retaining wall, and a plurality of spar beams extending in a direction intersecting both the cross beams. The retaining girder body is formed by stacking them in a girder form, and the cross girder material is made of wood on the girder girder retaining wall in which the filling material is filled in the retaining wall body. In addition, a reinforcing bar insertion hole is formed to penetrate in the vertical direction at each side end, and the connection stepped recesses formed at the side ends of the horizontal beam members adjacent in the longitudinal direction are fitted from the vertical direction. In combination, the reinforcing bar insertion holes formed at each side end can be connected to each other by matching up and down,
As wooden, the fitting recesses are formed at the front and rear portions of the upper surface and the lower surface, respectively, and the reinforcing bar insertion holes are formed to penetrate the fitting recesses at the substantially central positions in the vertical direction, and the cross beams adjacent in the longitudinal direction are formed. The connection stepped recesses formed at each end of the material are fitted from above and below, and in the same state, are loosely fitted to the fitting recesses formed on the upper surface of the end of the girder by crossing from above. At the same time, the reinforcing bar insertion hole formed at each end of the adjacent cross beam and the reinforcing bar insertion hole formed in the fitting recess of the stay girder are vertically aligned to communicate with each other. On the upper surface of the end, the fitting recess formed on the lower surface of the girder is crossed and loosely fitted, and the reinforcing bar insertion hole formed on each end of the adjacent girder is fitted with the girder. The rebar insertion hole formed in the recess is vertically aligned to communicate with each other, and communicates in the vertical direction During muscle insertion hole, there is provided cents curb assembly retaining wall, characterized in that inserting the rebar.

Further, the present invention provides a method for casting a concrete at a place where a retaining wall is constructed, constructing a foundation, and providing an interval on the upper surface of the foundation in the front-rear direction and the longitudinal direction of the retaining wall to guide each girder member. A reinforcing bar functioning for positioning is erected, and each reinforcing bar is matched with a reinforcing bar insertion hole formed in each girder material,
It is also characterized in that a reinforcing bar is inserted into each reinforcing bar insertion hole, and each girder material is slid down and placed on a foundation.

[0008]

[Function] When constructing a girder girder retaining wall, a plurality of girder members are arranged at intervals in the longitudinal direction of the retaining wall on a concrete foundation pre-cast at the retaining wall construction site. A pair of cross girders are laid crosswise on top of each other, and a plurality of girder members are arranged on both cross girders at intervals in the longitudinal direction of the retaining wall. To form a retaining wall main body, and fill the inside of the retaining wall main body with a filling material to construct.

At this time, since the cross beam and the stay beam are each made of wood, the retaining wall body can be flexed.

In the construction work of the girder retaining wall,
Since each girder is made of wood approximately 1/4 to 1/5 of concrete with specific gravity, it can be easily transported by human power, making it easy to carry out restoration work on hillsides where it is difficult to carry transport equipment. be able to.

Further, since each wooden girder is significantly lighter than concrete, it can be constructed even when the ground at the retaining wall construction site is weak.

The cross beam is made of wood, and is formed with connection stepped recesses at both end portions, and a reinforcing bar insertion hole is formed at both end portions so as to penetrate in the vertical direction. The stepped recesses for connection formed at the side end portions of the horizontal girder material to be engaged with each other from above and below, so that the reinforcing bar insertion holes formed at each side end portion can be connected to each other by being aligned in the up and down direction. The spar material is made of wood, and formed with fitting recesses at the front and rear portions of the upper surface and the lower surface, respectively, and formed by vertically penetrating a reinforcing bar insertion hole at a position substantially at the center of each fitting recess, The connection stepped recesses formed at each end of the horizontal beam member adjacent in the longitudinal direction are fitted from the top and bottom,
In the same state, the fitting is formed so as to intersect loosely from above from the fitting recess formed on the upper surface of the end of the girder, and the reinforcing bar insertion holes formed on the respective ends of the adjacent girder and the reinforcing girder. The rebar insertion holes formed in the fitting recesses are vertically aligned to communicate with each other, and furthermore, the fitting recesses formed on the end lower surfaces of the adjacent girder members are crossed with the end upper surfaces of the adjacent cross beams. While being loosely fitted, the reinforcing bar insertion holes formed at the respective ends of the adjacent cross beams and the reinforcing bar insertion holes formed in the fitting recesses of the spar beams are vertically aligned to communicate with each other, and communicate vertically. A reinforcing bar is inserted through the reinforcing bar insertion hole. Therefore, even when an eccentric load is applied to the retaining wall main body, the eccentric load can be dispersed at the fitting portion having play, so that the retaining wall main body can be further flexed, and the ground of the retaining wall construction location can be further improved. The main body of the retaining wall can be adapted to various movements such as unequal subsidence of the ground, and vertical and horizontal swaying of the ground during an earthquake, and the retaining wall itself can be prevented from collapsing. Moreover, since the reinforcing bar insertion holes formed at the ends of the respective girder members are communicated with each other in the vertical direction, and the reinforcing bars are inserted into these reinforcing bar insertion holes, the retaining wall body can be reinforced by the reinforcing bars, Also from this point, the retaining wall itself can be prevented from collapsing. In addition, concrete is poured into the retaining wall construction site to construct the foundation, and on the upper surface of the foundation, reinforcing bars functioning as guides and positioning for each girder material are provided at intervals in the front and rear direction and the longitudinal direction of the retaining wall. Standing up, each rebar is matched with the rebar insertion hole formed in each girder material, and the rebar is inserted into each rebar insertion hole, and each girder material is slid down and placed on the foundation. ing. Therefore, when the girder members are alternately stacked on the foundation and assembled into a girder shape, the reinforcing bars erected on the foundation perform the function of guiding and positioning each girder member, and smoothly and reliably construct the girder girder retaining wall. be able to.

In the case where a sheet for preventing leakage of the inlay material having water permeability is stretched on the inner surface of the mirror portion of the retaining wall body, the intrusion of the infill material from the inside of the retaining wall body can be prevented by the sheet. it can.

When a vegetation sheet in which plant seedlings and seeds and a fertilizer are embedded in the sheet body is used as the sheet for preventing infiltration, the vegetation sheet can propagate the plant. The greening of the retaining wall and the beautification of the environment can be achieved.

[0015] When a vegetation soil bag in which soil, plant seeds and fertilizer are mixed is used as an inlay material, plants can be propagated by the vegetation soil bag. And beautification of the environment.

[0016] When plants with good rooting properties are vegetated on the upper surface of the filling material forming the top end of the girder-girder retaining wall, the retaining wall can be greened and the environment beautified. The reinforcement of the retaining wall itself and the restoration of the landslides and landslides on the hillside can be completed in a short time.

[0017]

Embodiments of the present invention will be described below with reference to the drawings.

1 to 3 show a girder-girder retaining wall A according to the present invention.
FIG. 1 is a side explanatory view showing a construction form of FIG. 1. FIG. 1 shows a construction form of a girder-girder retaining wall A as a wall for preventing collapse of a steep slope on a hillside B, and FIG. D (especially a forest road) shows a construction form of a girder girder retaining wall A as a road retaining wall for protecting a forest road, and FIG. Along the hillside B, a plurality of girder girder retaining walls A are constructed in a step-like manner, and the roots of plants E with good rooting are formed on the top end a of each girder girder retaining wall A.
Girder as a hillside stairway retaining wall for the purpose of planting grass and turf, applying cuttings and upholstery F to the mirror part b of each girder girder retaining wall A, and restoring the current condition within a certain period The construction form of the retaining wall A is shown.

Next, the construction of the retaining wall A of the girder set will be described with reference to FIGS.

That is, as shown in FIGS. 4 to 6, the cross-girder retaining wall A intersects a pair of front and rear cross beams 1, 1 extending in the longitudinal direction of the retaining wall, and both cross beams 1, 1. A plurality of spar members 2, 2 extending in the direction are alternately stacked and assembled in a cross-girder shape to form a retaining wall main body 3, and a mirror portion b of the retaining wall main body 3
In addition, a sheet 4 for preventing leakage of an infill material having water permeability is stretched on the inner surface of the inner wall, and the infill material 5 is filled in the retaining wall main body 3.

As shown in FIGS. 4 to 6, the horizontal girder 1 is made of wood in the shape of a rectangular bar, and has connection stepped recesses 1a, 1a at both ends.
In addition to forming a, a reinforcing-bar insertion hole 6, 6 is formed at both end portions so as to penetrate vertically. However,
As for the cross beam member 1 located at the outer end, as shown in FIG. 4B, the connection stepped concave portion 1a is formed only at the inner end which is the connection end.

In this way, when a plurality of cross beams 1 are connected in the longitudinal direction, the connecting stepped concave portions 1a, 1a formed respectively are fitted to adjacent ends thereof from above and below. The rebar insertion holes 6, 6 formed at the respective ends are aligned with each other in the vertical direction so that they can communicate with each other.

Here, the size of the cross beam 1 is designed to be, for example, 995 mm in the left and right longitudinal width, 150 mm in the up and down width, and 85 mm in the front and rear width, and can be easily carried by human power. Is preferred.

As shown in FIGS. 4 to 6, the girder member 2 is made of wood in the shape of a rectangular bar, and is formed with fitting recesses 2a, 2a at the front and rear portions of the upper and lower surfaces, respectively. Two
Reinforcing bar insertion holes 7, 7 are formed at positions substantially at the center of a, 2a so as to penetrate vertically. However, as for the girder member 2 located at the lowermost stage, as shown in FIG. 4 (b), fitting recesses 2a, 2a are respectively formed on the front and rear portions of only the upper surface.

Thus, the spar beam 2 is replaced with the spar beam 2
When stacking cross beams 1 on top,
The ends of the cross beams 1 are loosely fitted to the fitting recesses 2a formed on the upper surfaces of the ends of the cross beams from above, and the reinforcing bar insertion holes 6 and 7 formed at the respective ends are aligned with each other in the vertical direction. In addition, when the spar beam 2 is crossed and stacked on the cross beam 1, the upper surface of the end of the spar beam 2 is placed on the lower surface of the end of the spar beam 2. The fitting recesses 2a formed in the above are crossed and loosely fitted, and the rebar insertion holes 6 and 7 formed in the respective ends can be connected to each other by being aligned in the up-down direction.

Here, the size of the spar beam 2 is designed to be, for example, a longitudinal length of 795 mm, a vertical width of 180 mm, a lateral width of 100 mm, and a size that can be easily carried by human power. Is preferred.

Further, the horizontal girder member 1 and the spar girder member 2 are subjected to waterproof treatment and antiseptic treatment, respectively.

Next, the construction procedure of the girder-girder retaining wall A will be described with reference to FIGS.
This will be described with reference to FIG.

As shown in FIG. 4A, a part of the hillside B is cut to form a retaining wall construction place G, concrete is poured into the retaining wall construction place G, and a foundation K is constructed. Same basic K
The reinforcing bar insertion holes 8 are formed by drilling on the upper surface of the steel plate at intervals in the front-rear direction and the left-right width direction, which is the longitudinal direction of the retaining wall, and guide and positioning of the beam members 1 and 2 in each reinforcing bar insertion hole 8. A reinforcing bar 9 functioning as a tool is inserted and erected.

At this time, the interval between the reinforcing bar insertion holes 8 and 8 adjacent in the left-right width direction is matched with the interval between the reinforcing bar insertion holes 6 and 6 formed at the left and right end portions of the cross beam 1, respectively, The spacing between the reinforcing bar insertion holes 8 and 8 facing each other is made to match the spacing between the reinforcing bar insertion holes 7 and 7 formed at the front and rear ends of the spar beam 2 respectively.

As shown in FIG. 4A, the reinforcing bars 9, 9 facing the front and rear are matched with the reinforcing bar insertion holes 7, 7 formed at the front and rear ends of the spar beam 2. The reinforcing bars 9, 9 are inserted through 7, and the spar member 2 is slid downward along the both reinforcing bars 9, 9 and placed on the foundation K.

Similarly, as shown in FIG. 4B, a predetermined number of spar beams 2 are successively placed on the foundation K so as to be adjacent in the right direction.

As shown in FIG. 4B, the reinforcing bars 9, 9 adjacent to each other in the left-right width direction are matched with the reinforcing bar insertion holes 6, 6 formed in the left and right ends of the cross beam 1, and each reinforcing bar is inserted. The reinforcing bars 9, 9 are inserted into the holes 6, 6, and the cross beam 1 is slid downward along the reinforcing bars 9, 9 to fit the adjacent beam members 2, 2 in the left-right width direction. The left and right ends of the cross beam 1 are loosely fitted into the recesses 2a, 2a, and are horizontally mounted.

At this time, the pair of cross beam members 1, 1 are placed on the keeper beam members 2, 2 as a pair of front and rear members, and then sequentially moved rightward in FIG. The horizontal beam members 1, 1 adjacent to each other in the left-right width direction are connected to each other by fitting the connection stepped concave portions 1a, 1a formed at the ends thereof from above and below.

As shown in FIG. 4B, on a pair of front and rear cross beams 1, 1 connected in a rail shape in the left-right width direction,
The reinforcing members 9, 9 are inserted through the reinforcing bar insertion holes 7, 7 and the sliding member 2 is slid downward, and the fitting recess formed on the lower surface of the reinforcing member 2 on each end of the cross beams 1, 1 2a, 2a is loosely fitted and laid horizontally.

Similarly, as shown in FIG. 4 (b), a predetermined number of spar beams 2 are sequentially placed on the cross beams 1 and 1 adjacent to each other in the right direction.

As shown in FIG. 5, the above operation is repeated to assemble the retaining wall main body 3.

As shown in FIG. 6A, the retaining wall body 3
For example, when the spar girder 2 and the horizontal girder 1 are stacked and assembled in three steps, respectively, the band-shaped sheet 4 for preventing the penetration of the middle member is hung down along the mirror portion b of the retaining wall body 10, The lower end 4a of the sheet 4 is brought into surface contact with the upper surface of the base K, and a predetermined portion of the sheet 4 is stopped by hitting a nail or the like to each of the beams 1 and 2.

Here, as the sheet 4 for preventing leakage of the filling material, chemical fibers having water permeability and high tensile strength can be used.

As shown in FIG. 6A, the filling material 5 is filled in the retaining wall main body 3, and the filling material 5 is also provided in the space between the rear side of the retaining wall main body 3 and the slope of the hillside B. Fill.

At this time, the retaining wall main body 3 is assembled by the relatively lightweight cross beams 1 and the spar beams 2, and is supported by the reinforcing bars 9, so that the retaining wall main body 3 has good self-sustainability. The filling work of No. 5 can be performed with confidence.

As shown in FIG. 6B, the horizontal girder member 1 and the spar girder member 2 are further stacked to extend the retaining wall body 3 to a predetermined height, and the mirror part b of the expanded retaining wall body 3 Then, the sheet 4 for preventing the inset material from leaking is stretched in the same manner as described above.

As shown in FIG. 6B, the inside of the expanded retaining wall body 3 is filled with the filling material 5, and
Is also filled with the filling material 5 in the space between the back of the vehicle and the slope of the mountainside B. At this time, the upper end 4b of the sheet 4
The upper end portion 4b is filled with the filling material 5 to form a top end portion a with the filling material 5 being buried in the upper layer portion of the filling material 5.

As shown in FIGS. 1 to 3, a plant E having good rooting properties (for example, yashabushi) can be vegetated on the top end a. In this case, the greening of the retaining wall and the beautification of the environment can be achieved, and the plant E
The reinforcement of the retaining wall itself and the restoration of landslides and landslides can be completed in a short time. In addition, if the upper end 4b of the sheet 4 for preventing the inset material from leaking out interferes with the vegetation, it can be cut and removed.

Here, as the sheet 4 for preventing the infiltration material from leaking out, a vegetation in which seedlings and seeds of plants (for example, sugar beet) and fertilizer are embedded in a sheet body made of chemical fiber having water permeability and high tensile strength. In this case, as shown in FIGS. 1 and 3, the vegetation sheet allows plants to be propagated on the mirror portion b of the retaining wall main body 3, so that the vegetation sheet can be used. Greening of walls and beautification of the environment can be achieved.

As described above, the girder girder retaining wall A according to the present embodiment can be constructed, and the girder girder retaining wall A can be constructed according to the above-mentioned FIGS. Can be adopted.

FIG. 7 and FIG. 8 show a cross-girder retaining wall A as another embodiment.
As part of the soil, a vegetation soilbag 10 formed by bagging a mixture 10a, which is a mixture of soil, plant (for example, pampas grass) seeds and fertilizer, is placed in the retaining wall main body 3 in the opening of the mirror part b. The uppermost vegetation soil bladder 10 has a large size formed thereon to form the top end a.

In this case, the plants can be propagated on the top end portion a and the mirror portion b of the retaining wall main body 3 by the respective vegetation soil bladders 10, so that also in this case, the retaining wall is greened and the environment is beautified. Can be achieved.

When the vegetation soilbag 10 is used, there is no need to install the sheet 4 for preventing leakage of the infill material.

FIG. 9 shows a girder-girder retaining wall A as another embodiment. In the girder-girder retaining wall A, a vegetation soil bag 10 is piled up as the embedding material 5 in the retaining wall main body 3. Filling.

The vegetation soil bag 10, except for the one placed on the top, partially accommodates the mixed material 10a only on the side facing the mirror portion b, and accommodates the embedded material 5 in the remaining portion. The vegetation soil bag 10 forming the top end a of the uppermost stage contains only the mixed material 10a. In this way, the labor for filling the filling material 5 into the retaining wall main body 3 and the labor for stretching the sheet 4 for preventing the leakage of the filling material are saved, and the efficiency of the retaining wall construction work is improved, and the top end a The plant is bred on the mirror part b to green the retaining wall and beautify the environment.

In this embodiment, the fitting recess 2a is formed in the stay girder member 2. However, the fitting recess may be formed in the horizontal girder member 1. Alternatively, both the girder members 1 and 2 may be formed. Each of the fitting recesses may be formed.

[0053]

According to the present invention, the following effects can be obtained.

According to the first aspect of the present invention, since the horizontal girder material and the stay girder material are each made of wood, the main body of the retaining wall can be flexed.

In the construction work of the girder retaining wall,
Since each girder is made of wood approximately 1/4 to 1/5 of concrete with specific gravity, it can be easily transported by human power, making it easy to carry out restoration work on hillsides where it is difficult to carry transport equipment. be able to.

Furthermore, since each wooden girder is significantly lighter than concrete, it can be constructed even when the ground at the retaining wall construction site is weak. In addition, the rebar insertion holes formed at the ends of each girder are connected vertically,
Since the reinforcing bars are inserted into the reinforcing-bar insertion holes, the retaining wall main body can be reinforced by the reinforcing bars, and from this point, the retaining wall itself can be prevented from collapsing.

According to the second aspect of the present invention, concrete is poured into the retaining wall construction site to construct a foundation, and the upper surface of the foundation is spaced apart in the front-rear direction and the longitudinal direction of the retaining wall, and each girder member is provided with a space. Reinforcing bars functioning as guides and positioning are erected, and each reinforcing bar is matched with the reinforcing bar insertion hole formed in each girder material, and the reinforcing bar is inserted into each reinforcing bar insertion hole, and each girder material slides down. And put it on the foundation. Therefore, when the girder members are alternately stacked on the foundation and assembled into a girder shape, the reinforcing bars erected on the foundation perform the function of guiding and positioning each girder member, and smoothly and reliably construct the girder girder retaining wall. be able to.

According to the third aspect of the present invention, since the sheet for preventing leakage of the filling material having water permeability is stretched on the inner surface of the mirror portion of the retaining wall body, the filling material allows the filling material to be inserted from inside the retaining wall body by the sheet. Leakage can be prevented.

According to the fourth aspect of the present invention, since a sheet for burying plant seedlings and seeds and a fertilizer is embedded in the sheet body as the sheet for preventing leakage of the filling material, the sheet for vegetation is used. As a result, the plants can be propagated, so that the greening of the retaining wall and the beautification of the environment can be achieved.

According to the fifth aspect of the present invention, since a vegetation soil which is a mixture of soil, plant seeds and fertilizer is used as an inlay material, plants can be propagated by the vegetation soil. Thus, greening of the retaining wall and beautification of the environment can be achieved.

According to the sixth aspect of the present invention, since the plants with good rooting properties are vegetated on the upper surface of the filling material forming the top end of the girder-girder retaining wall, the retaining wall is greened and the environment is beautified. The vegetation makes it possible to reinforce the retaining wall itself and restore landslides and landslides on the hillside in a short time.

[Brief description of the drawings]

FIG. 1 is an explanatory cross-sectional side view of a girder assembly retaining wall according to the present invention.

FIG. 2 is a sectional side view illustrating another construction of the girder girder assembly retaining wall.

FIG. 3 is a sectional side view showing another construction of the retaining wall of the girder girder assembly.

FIG. 4 is an explanatory view of a construction procedure of the girder girder retaining wall.

FIG. 5 is a perspective view of a retaining wall main body of the girder girder assembly retaining wall.

FIG. 6 is an explanatory view of a construction procedure of a retaining wall of the girder girder assembly.

FIG. 7 is an explanatory cross-sectional side view of a girder assembly retaining wall as another embodiment.

FIG. 8 is a sectional view taken along line II of FIG. 7;

FIG. 9 is an explanatory cross-sectional side view of a cross beam retaining wall as another embodiment.

[Explanation of symbols]

 Reference Signs List A Aerial girder retaining wall 1 Lateral girder material 2 Retainer girder material 3 Retaining wall main body 4 Sheet for preventing leakage of inset material 5 Infill material 6 Reinforcement insertion hole 7 Reinforcement insertion hole 8 Reinforcement insertion hole 9 Reinforcement sandbag

Claims (6)

(57) [Claims] A pair of cross girder members extending in the longitudinal direction of the retaining wall and a plurality of girder members extending in a direction intersecting both the cross girder members are alternately stacked to form a cross girder. Girder girder retaining wall that forms the wall main body and fills the inside of the retaining wall main body
, The cross beam is made of wood and has stepped recesses at both ends.
And rebar insertion holes at both ends
In the longitudinal direction, and
Stepped recesses for connection formed on the side ends are fitted vertically
The rebar insertion holes formed at each side end
To be able to communicate with each other.
To form fitting recesses, and approximately the center of each fitting recess.
Connection step formed at each end of a cross beam that is formed by vertically penetrating a reinforcing bar insertion hole at the position of
The recesses are fitted together from the top and bottom.
Crosses from above into the fitting recess formed on the upper surface of the end of the girder
At the end of each adjacent cross beam.
Reinforcing bar formed in the recess for fitting the formed reinforcing bar through hole
The insertion holes are aligned vertically to communicate with each other, and
Formed on the upper surface of the end of the cross beam that touches
The fitting recesses are crossed and loosely fitted, and
For fitting the reinforcing bar insertion hole formed at each end of the horizontal girder with the stay girder
Align the vertical direction with the reinforcing bar insertion hole formed in the concave
Through so, the reinforcing bar insertion hole in communicating with the vertical direction, curb sets retaining wall, characterized in that inserting the rebar. 2. Concrete is poured into a retaining wall construction site.
Install the foundation and place it on the top of the foundation
The guide and positioning of each girder material with a space in each direction
Steel bars that function as
Match the formed rebar insertion holes, and
Through the rebar, slide each girder down and down on the foundation.
The retaining wall according to claim 1, wherein the retaining wall is mounted . 3. A mirror having water permeability on the inner surface of the mirror portion of the retaining wall body.
Claims characterized in that a sheet for preventing material leakage has been stretched
Item 1. A girder-girder retaining wall according to item 1 . 4. A sheet as a sheet for preventing leakage of an inset material.
A vegetation sheet that incorporates plant seedlings and seeds and fertilizer into the body
4. The retaining wall according to claim 3, wherein said retaining wall is used. 5. A mixture of soil, plant seeds and fertilizer as a filling material.
The retaining wall according to claim 1, wherein a combined vegetation soilbag is used . 6. A hollow member forming a top end of a retaining wall of a girder assembly.
It is characterized by vegetation with good rooting ability on the upper surface
The girder retaining wall according to claim 1.