JPH0693626A - Retaining wall block and retaing wall structure - Google Patents

Abstract

PURPOSE:To construct a retaining wall which is excellent in cross performance and satisfies various requirements for structural theory and exceeds the height of ten meters and form as a rigid member integrated with a foundation which is capable of carrying blocks to a construction site and providing excellent workability. CONSTITUTION:A large-sized retaining wall service block A1 which is provided with a front wall 14 and a counterfort 16 protrusively installed on the rear side of this front wall 14, and a plurality of retaining wall service blocks A2, A3 and A4 where the retaining wall 16 shorter than the large-sized retaining wall service block is formed are stacked on the top of a foundation. An expandable wall 22, which expands on both sides, is installed to the end of the counterfort 16 of a large block A1 where a reinforcing bar insertion service large-sized hole 24 is bored. There is provided a reinforcing bar insertion service middle- sized hole 26 or 28, which allows anchor reinforcing bars 18 or connection reinforcing bars 20 to be inserted into the holes communicating with one another and upper and lower blocks to be connected by use of a filling material.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall block and a retaining wall construction structure.

[0002]

2. Description of the Related Art In recent years, as a retaining wall structure constructed on roads, coasts, river banks, etc., a foundation footing placed in the soil and a T-shaped block laminated at a predetermined height have been constructed.
In this T-shaped block, a plurality of reinforcing bar insertion holes are provided in the retaining wall projecting from the back surface of the front wall, and the basic footing is applied to the reinforcing rod insertion holes communicating with each other while the retaining walls are superposed in the upper and lower blocks. Inserting more protruding anchor rebars, inserting connecting rebars connected to the anchor rebars in the middle and upper positions, and at the same time filling a filling material such as mortar or concrete with multiple blocks stacked vertically A retaining wall structure has been constructed in which blocks are laminated at a predetermined height while being integrally connected to the foundation footing.

[0003]

However, since the earth pressure acting on the retaining wall increases from the upper position to the lower position, the block shape is large in the lowermost region and has excellent cross-sectional performance. However, in the existing retaining wall structure, the blocks for large retaining walls are simply laminated, and there is also a problem with the arrangement of the reinforcing bars within the block, which results in low cross-sectional performance, and therefore the building height is about 10%. It is less than a meter, and has the drawback that a high retaining wall of more than 10 meters cannot be constructed. In addition, at the joints of blocks stacked in the upper and lower stages, the "fogging" of the mortar or concrete filled with the reinforcing bars inserted in the reinforcing bar insertion holes is offset, and the blocks of solidified mortar or concrete become thinner. The adhesive strength to the block is also weakened and the proof strength of the upper and lower joints of the block is also weak and not stable.Therefore, within the range where the block is brought to the site as an off-the-shelf product and the structural theoretical conditions are satisfied. There was a need for a retaining wall block and a retaining wall construction that would be highly efficient in transportation and construction, and would exert strong resistance as the retaining wall itself.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a retaining wall up to a desired height of about 10 meters or more while being excellent in cross-sectional performance and satisfying various conditions in structural theory. It is an object of the present invention to provide a retaining wall block and a retaining wall construction structure that can be constructed, and that can be formed as a rigid body integrated with the foundation, which is excellent in transportability to the site and workability because the block itself is lightweight.

[0005]

In order to achieve the above object, the present invention comprises a front wall 14 and a buttress 16 projectingly formed on the back side of the front wall 14, and the buttress is provided. A bulging wall 22 bulging in both directions is provided at the end of 16
At least in the expansion wall 22, a large diameter hole 24 for inserting a reinforcing bar communicating with the upper and lower surfaces is opened, and a connecting reinforcing bar 32 is arranged in the front wall 14 and the retaining wall 16 and is substantially retained. Wall 16
From the front portion of the same retaining wall 16 to the first joint reinforcing bar group 34a disposed from the rear portion of the retaining wall 16 to the expansion wall 22 and the substantially same retaining wall 16 alternately provided in the height direction of the first joint reinforcing bar group 34a. And a second combined reinforcing bar group 34b arranged over the expansion wall 22, each of the first and second combined reinforcing bar groups
It is constituted by a retaining wall block A formed by forming a cross reinforcing bar layer 42 by arranging so as to intersect at a position near a connecting portion between the buttress wall and the expansion wall.

The front wall 14 and a retaining wall 16 projecting from the back side of the front wall 14 are provided.
A bulging wall 22 bulging in both directions is provided at the end of the bulging wall 22. At least a large-diameter hole 24 communicating with the upper and lower surfaces is opened in the bulging wall 22 to connect the front wall 14 and the front wall 14. , Buttress 1
The combined reinforcing bars 32 arranged in 6 include a first combined reinforcing bar group 34a arranged from the front part of the substantially retaining wall to the expansion wall 22 at the rear part of the retaining wall, and the first combining reinforcing bar group 34a. The second connecting rebar group 34b that is alternately provided in the height direction and is disposed from the substantially retaining wall to the expansion wall, and intersects at a position near the connecting portion between the retaining wall and the expansion wall. The cross reinforcement layer 42 is formed by arranging, and the cross reinforcement layers 42 are alternately provided in the height direction of the cross reinforcement layer 42 and are arranged from the front portion of the substantially buttress wall to the expansion wall at the rear portion of the buttress wall. And a third joint reinforcing bar group 34c and a fourth joint reinforcing bar group 34d which are alternately provided in the height direction of the third joint reinforcing bar group 34c and are arranged from substantially the same retaining wall to the expansion wall And a retaining wall block A having a layer 44.

The front wall 14 and a retaining wall 16 projectingly formed on the back side of the front wall 14 are provided.
A bulging wall 22 bulging in both directions is provided at the end of the bulge, and a large diameter hole 24 for rebar insertion that communicates with the upper and lower surfaces is opened in the bulging wall 22 and the above A block for a retaining wall in which a plurality of holes for inserting a reinforcing bar, which communicate with the upper and lower surfaces, are opened in the wall 16 and a tapered surface 46 is provided on the end surface side of these holes so as to expand the diameter from the holes. Composed of A.

A large anti-reduction bar 47 may be arranged on the front side of the front wall 14.

Further, in the large-diameter hole 24a for inserting the reinforcing bar or the plurality of holes 24b, 26, 28 for inserting the other reinforcing bars, the hole diameter becomes smaller from the inside upper edge side toward the lower edge side of these holes. It may be formed as a tapered hole.

Next, a large retaining wall block A1 having a front wall 14 and a retaining wall 16 projectingly formed on the back side of the front wall 14 is arranged on the upper surface of the foundation footing 12, and the large retaining wall is provided. On the upper surface of the wall block A1, a plurality of retaining wall blocks A2, A3, A4 each having a shorter retaining wall rear side projecting length than the large retaining wall block are stacked and constructed.
A bulging wall 22 bulging in both directions is provided at an end of the retaining wall of the large retaining wall block, and at least the bulging wall 22 has a large diameter for inserting a reinforcing bar that communicates with the upper and lower surfaces. Hole 2
4 is opened, and a reinforcing rod insertion small hole 26 is provided in the buttress wall closest to the front wall side, and the small hole 26 is larger than the small hole 26 at an intermediate position between the small hole 26 and the large diameter hole 24. big,
In addition, the small hole 26 provided with the medium diameter hole 28 smaller than the large diameter hole 26 and provided in the buttress wall closest to the front wall side is the large retaining wall block A1 and a plurality of retaining members stacked on the upper surface side thereof. The foundation footing 12 is positioned and laminated so as to form a communication hole that directly communicates with the small hole 26 provided in the retaining wall 16 closest to the front wall side of the wall blocks A2, A3, A4.
More protruding anchor rebar 18 and foundation footing 1
2 Retaining wall construction structure 10 in which upper and lower retaining wall blocks are integrally connected by connecting a connecting rebar 20 that connects each retaining wall block mounted on the upper surface to a connecting layer in the communication hole Composed.

The large-diameter hole 24 provided in the expansion wall 22 may be formed so as to have a side or diameter larger than the thickness width of the retaining wall 16.

The medium-diameter hole 28 may be formed as a vertically elongated hole elongated in the longitudinal direction of the retaining wall in plan view.

Further, on the upper surface of the large-sized retaining wall block A1, a secondary large-sized retaining wall block A is formed in which the projecting length on the back side of the retaining wall 16 is shorter than the large-sized retaining wall block.
2 is installed, and the expansion wall 1 of this secondary large retaining wall block 1
6 is formed smaller than the expansion wall 16 of the large retaining wall block A1, and the secondary large diameter hole 24b of the secondary large retaining wall block is smaller than the large diameter hole 24a of the large retaining wall block. Further, the secondary large-diameter hole may be formed so as to be laminated so as to be positioned substantially in the front half of the large-diameter hole of the large retaining wall block on the front wall 14 side.

Also, the large diameter hole 2 provided in the expansion wall 16
4a, 24b, the inner surface of the medium-diameter hole 26 or the small-diameter hole 28 provided in the retaining wall 16 is provided with unevenness or an uneven groove 52 for firmly connecting and fixing the reinforcing bars, the filler, etc. to be inserted. It may be done.

Further, the large diameter hole 24a for inserting the reinforcing bar, the small hole 28 for inserting the reinforcing bar, the medium diameter hole 26, and the secondary large diameter hole 24b have small hole diameters from the inner upper edge side to the lower edge side. It may be formed as a tapered hole.

Further, the foundation footing 12 includes a front toe portion 48 for supporting the front surface side of the retaining wall body to be constructed and a rear toe portion 50 for supporting the rear surface side thereof, and the front toe portion 48 includes The leg portion 54 may be provided so as to extend further downward from the lower surface of the front toe portion.

[0017]

In the retaining wall block and the retaining wall construction of the present invention, the large retaining wall block A1 is located at the position of the anchor rebar 18 projecting on the upper surface of the placed foundation footing 12.
The anchor rebars 18 and the connecting rebars 2 are stacked inside the large-diameter holes 24a, the medium-diameter holes 28, and the small holes 26 for inserting the respective rebars that are in communication with each other.
0 is fitted to fill and solidify the filler to construct the lower layer portion of the retaining wall, and the secondary large retaining wall block A2 is similarly laminated on the upper surface to construct the middle layer portion of the retaining wall. Further, the upper layer portion is constructed by the medium-sized retaining wall block A3, and the uppermost portion is constructed by the small retaining wall block A4. In the large-diameter hole 24 of the retaining wall 16 of each block from the lower layer portion to the intermediate layer portion, It is possible to prevent the front wall 14 from being broken by earth pressure while holding each laminated front wall 14 as a concrete column in which reinforcing bars and fillers are continuously connected to the foundation footing 12. Since the small holes provided in the wall form straight communication holes from the large block in the lower stage to the block in the uppermost stage to insert the connecting rebars, etc., one rigid body can be formed as the entire retaining wall and It can be built to a higher retaining wall height. In addition, since the block itself has a cross reinforcement layer, or the cross reinforcement layer and the opposing reinforcement layer are alternately laminated in the height direction, it is possible to form a high pressure resistant retaining wall block having excellent compressive strength and tensile strength. .

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to the accompanying drawings. 1 and 2 show a retaining wall (retaining wall construction structure) 10 constructed by using a retaining wall block A according to an embodiment of the present invention. As is clear from the figure, the retaining wall 10 includes a lower layer portion of the retaining wall 10 in which large-sized retaining wall blocks A1 are stacked in five steps on the upper surface of a reinforced concrete foundation footing 12. This large retaining wall block A1
Is formed by projecting and fixing a retaining wall 16 on the back surface of a front wall 14 described later. Also, this large retaining wall block A1
On the upper surface of the above, a secondary large-sized retaining wall block A2, which will be described later, in which the length of the retaining wall 16 is formed to be short is laminated in four stages, so to speak, to form the middle layer portion of the retaining wall 10. Furthermore, blocks A3 for a medium-sized retaining wall, which will be described later, in which the length of the retaining wall 16 is formed on the upper surface of the middle layer portion are further laminated in three stages to form the retaining wall 1
0 upper layer portion is constructed, and further, a small retaining wall block A4, which will be described later, in which the length of the retaining portion 16 is formed on the upper surface of the upper layer portion to be described later is laminated in three stages to form the uppermost layer portion of the retaining wall 10. Is being built.

The reinforced concrete foundation footing 12
And a large retaining wall block A1 are anchor reinforcing bars 18 protruding from the reinforced concrete foundation footing 12, and each large retaining wall block A1 and secondary large retaining wall block A
2, block A3 for medium size retaining wall, block A4 for small retaining wall
Are integrally connected to each other by connecting reinforcing bars 20 and the like, whereby the retaining wall 10 is reinforced concrete foundation footing 12
And the respective retaining wall blocks A are integrally connected to act as a rigid body having excellent strength, and can resist the earth pressure from the rear surface of the retaining wall 10. The number of stacking steps of each of the retaining wall blocks A is not limited to the above-described embodiment, and may be any number of steps depending on the height of the retaining wall 10. The retaining wall block A according to the present invention is used by being incorporated in, for example, the above retaining wall construction structure 10.

3 to 12, there is shown a retaining wall block A according to an embodiment of the present invention. As is clear from the drawings, this block A is formed of reinforced concrete into a horizontally long rectangular shape. Front wall 14 and this front wall 1
Buttress 1 projecting and fixed at positions near both ends on the back side of 4
6 and 16 are provided. An expansion wall 22a is provided at an end of each butting wall 16 so as to bulge in both directions. The expansion wall 22a is formed at the ends of the butting walls 16 and 16 and each of the butting walls. A surrounding space is formed by the expanded wall 22a, and when a retaining wall is constructed by using the retaining wall block A, filling the space with a reinforcing material further improves the cross-sectional performance and the like. In the expansion wall 22a, a large-diameter hole 24a for inserting a reinforcing bar formed in a substantially rectangular shape is opened so as to communicate with the upper and lower surfaces.

Further, small holes 26, 26 for inserting the reinforcing bars, which communicate with the upper and lower surfaces, are opened at a position near each front wall 14 of each retaining wall 16, and an intermediate position between the small hole 26 and the large diameter hole 24a. A medium diameter hole 28 for inserting a reinforcing bar, which is larger than the small hole 26 and smaller than the large diameter hole 24a, is opened. The medium-diameter hole 28 for inserting the reinforcing bar is formed as a vertically long hole formed long in the longitudinal direction of the retaining wall 16 in plan view. This makes it possible to increase the number of reinforcing bars inserted in the holes formed in the retaining wall 16, and to increase the number of reinforcing bars formed in the longitudinal direction of the retaining wall 16 so that many reinforcing bars are arranged in the same direction. Both of the tensile strengths can be formed in a block structure having a high withstand voltage.

Further, the expanded wall 22a has a large diameter hole 2 for inserting a reinforcing bar.
Due to the opening of 4a, the expansion wall 22
Although the weight of the entire block does not increase in spite of the continuous connection of a, for example, when this block A is formed as a large retaining wall block arranged on the upper surface of the reinforced concrete foundation footing, this large diameter for inserting the reinforcing bar is used. Anchor reinforcement 18 of reinforced concrete foundation footing 12 in hole 22a
About 20 or more can be inserted and connected, and can be firmly connected to the reinforced concrete foundation footing 12.

As shown in the reinforcing bar diagrams of FIGS. 6 to 12, a mesh type reinforcing bar 30 is arranged in the front wall 14 of the retaining wall block A, and is connected from the front wall 14 into the retaining wall 16. Reinforcing bars 32 are provided. The combined reinforcing bars 32 are formed by a first combined reinforcing bar group 34 arranged substantially from the retaining wall 16 to the expansion wall 22a.
a and a second combined rebar group 34b which are alternately provided in the height direction of the first combined rebar group 34a and are arranged from the substantially retaining wall 16 to the expansion wall 22a.

As shown in FIGS. 9 and 10, each reinforcing bar element of the first combined reinforcing bar group 34a has a bent portion 36a at one end for connecting to the mesh type reinforcing bar 30 in the front wall 14. It is composed of a straight portion 38a along the buttress 16 and a Z-shaped bent portion 40a bent counterclockwise in a plan view along the expansion wall 22a, and each reinforcing element of the second combined reinforcing bar group 34b. Is
A bent portion 36b that is formed symmetrically to each reinforcing element of the first combined reinforcing bar group 34a, a straight portion 38b, and an inverted Z-shaped bent portion 4 that is bent along the expansion wall 22a in a clockwise direction in a plan view.
0b and. Then, the respective reinforcing bar elements of the first and second combined reinforcing bar groups 34a, 34b are arranged so as to intersect with each other at a position near the connecting portion between the retaining wall 16 and the expansion wall 22a to cross the reinforcing bar layer 42. Is forming.

Since the cross reinforcing bar layer 42 is laid out from the front wall 14 to the buttress wall 16, when it is used as a lower layer portion of the retaining wall structure as described above, the retaining wall block A is
Even if a large earth pressure acts on the front wall 14 and a tensile force acts on the retaining wall 16 fixed to the reinforced concrete foundation footing 12, a reaction force acts on the retaining wall 16 due to the cross reinforcing bar layer 42. The strength of the retaining wall A itself can be dramatically improved, and in the retaining wall construction structure using the retaining wall block A, since it can function as the overall tensile strength of the retaining wall, the overall strength of the retaining wall is enhanced. You will get it.
About this, when the opposing reinforcing layers 44 and the cross reinforcing bar layers 42 are alternately arranged in the height direction as described later,
The retaining wall 16 can be prevented from breaking, and the retaining wall block A can sufficiently withstand a large earth pressure.

In this embodiment, as shown in FIGS. 11 and 12, the opposing reinforcing layer 4 is arranged in the height direction of the cross reinforcing layer 42.
4 are alternately arranged. This opposing reinforcement layer 44
Is a third joint reinforcing bar group 34c arranged from the substantially retaining wall 16 on the back surface of the front wall 14 to the expansion wall 22a, and the substantially retaining wall which is alternately provided in the height direction of the third joint reinforcing bar group 34c. 16 and a fourth joint reinforcing bar group 34d arranged from the expansion wall 22a.

That is, each reinforcing bar element of the third combined reinforcing bar group 34c has a bent portion 36c at one end for connecting to the mesh type reinforcing bar 30 in the front wall 14 and a straight shape along the retaining wall 16. The portion 38c and the hook-shaped bent portion 40c bent in the clockwise direction in plan view along the expansion wall 22a, and each reinforcing bar element of the fourth combined reinforcing bar group 34d corresponds to the third combined reinforcing bar group 34c. Bent portion 36d formed symmetrically with each rebar element
A straight portion 38d and an inverted hook-shaped bent portion 40d bent counterclockwise in plan view along the expansion wall 22a.

Therefore, by alternately arranging the reinforcing bar elements of the cross reinforcing bar layer 42 and the opposing reinforcing bar layer 44 in the height direction from the front wall 14 to the retaining wall 16 and the expansion wall 22a,
In the retaining wall block A, a large earth pressure acts on the front wall 14,
For example, even if a tensile force acts on the buttress wall 16 fixed to the reinforced concrete foundation footing 12 to cause the hook-shaped bent portion 40c and the reverse hook-shaped bent portion 40d of the opposing reinforcing layer 44 to bulge outward, The Z-shaped bent portion 40a and the inverted Z-shaped bent portion 4 of each rebar element crossing the reinforcing bar layer 42
A force in the inward direction acts on 0b and absorbs the force, and breakage of the retaining wall 16 can be prevented.

Regarding the retaining wall block A according to the embodiment of the present invention, as shown in FIGS. 3 and 5, the expansion wall 22a is expanded.
A taper surface 46 is provided on the end face side of the large diameter hole 24a for inserting the reinforcing bar which is opened inside and the plurality of holes for inserting the reinforcing bar which are opened in the retaining wall 16 so as to be expanded from the hole. By forming the tapered surface 46, in particular, the joining surface that joins the retaining wall blocks to each other is brought into close contact with each other by the tapered surfaces 46, thereby forming a peripheral shape having a substantially rhombic cross section, and filling the filler. As a result, the filling capacity of the mortar concrete increases, and the structure strength corresponding to so-called proper "fog" is reinforced.

Further, as shown in FIGS. 6 and 7, the front wall 1 is
On the front surface side of the reticulated reinforcing bar 30 in 4, a plurality of large anti-reduction bar 47 having a diameter larger than each rebar of the reticulated reinforcing bar 30 may be arranged in the longitudinal direction. Generally, a strong compressive force is generated on the front side of the retaining wall in proportion to the tensile force on the rear side, and a compressive force commensurate with this compressive force is required. Therefore, the retaining wall block A can withstand a large compressive force applied to the front wall 14 of the block A by arranging the large-scale anti-shrink rebar 47 on the front side in the front wall 14, and is constructed. The strength of the retaining wall can be improved.

The retaining wall block described above is not limited to a large retaining wall block as in the embodiment, but is laminated and used on the upper surface side because it has the above-mentioned remarkable operational effects as a single unit. It may be used for a retaining wall block such as a middle layer or an upper layer part.

Next, the retaining wall construction structure 10 according to the present invention will be described. In this embodiment, the retaining wall block shown in FIGS. 3 to 12 is used as a large retaining wall block A1. . As shown in FIGS. 1 and 2, a large retaining wall block A1 having a front wall 14 and a retaining wall 16 projectingly formed on the back side of the front wall 14 is provided on the upper surface of the reinforced concrete foundation footing 12 in approximately five steps. The lower layer part of the construction structure 10 of the retaining wall is constructed by stacking the layers. On the upper surface of the stacked large retaining wall block A1, a secondary large retaining wall block A2 in which the rear side protruding length of the retaining wall 16 is formed shorter than the large retaining wall block A1, and for a medium retaining wall A plurality of retaining wall blocks, such as the block A3 and the small retaining wall block A4, are laminated and constructed.

13 to 20 show a secondary large retaining wall block A2 for stacking on the upper surface of the large retaining wall A1 to construct the middle layer portion of the retaining wall constructing structure 10. As shown in FIG. . The secondary large retaining wall block A2 includes a horizontally long rectangular front wall 14 and retaining walls 16 and 16 projectingly fixed at positions near both ends on the back side of the front wall 14, and each retaining member At the end of the wall 16, a bulging wall 22 is bulged so as to bulge in both directions.
b is provided. The expansion wall 22b is formed to have a length smaller than that of the expansion wall 22a at the end of the retaining wall 16 of the large retaining wall block A1, and the secondary large diameter hole 24b is formed in the expansion wall 22b. It has been opened. This secondary large diameter hole 2
4b is smaller than the large diameter hole 24a, and when the blocks are joined together, the secondary large diameter hole 24b is formed smaller than the large diameter hole 24a of the large retaining wall block A1.
The secondary large-diameter hole 24b is laminated so as to be located substantially in the front half of the large-diameter hole 24a of the large retaining wall block A1 on the front wall 14 side. As a result, it is necessary to have a cross-sectional force that increases in a quadratic curve due to the earth pressure that increases linearly as it goes to the lower side, forming a triangular retaining wall block while also considering economic efficiency. While satisfying the necessity of having to do so, the condition that the block A1 for the large retaining wall and the block A2 for the secondary large retaining wall are communicated within the expansion wall 22b can be satisfied, and a retaining wall structure with a high degree of completion can be constructed. It is a thing.

Further, small holes 26, 26 for inserting reinforcing bars, which communicate with the upper and lower surfaces, are formed at positions near the front wall 14 of each butting wall 16 of the secondary retaining wall block A2. A medium diameter hole 28 for inserting a reinforcing bar, which is larger than the small hole 26 and smaller than the large hole, is opened at an intermediate position of the secondary large diameter hole 24b. The small hole 26 provided on the side of the retaining wall 16 closest to the front wall 14 is the large retaining wall block A.
1 and a plurality of retaining wall blocks laminated on the upper surface side thereof are positioned and laminated so as to form a communication hole that directly communicates with the small hole 26 provided in the retaining wall 16 closest to the front wall 14 side. There is.

Further, reinforced concrete foundation footing 1
An anchor reinforcing bar 18 projecting from 2 and a connecting reinforcing bar 20 for connecting each retaining wall block mounted on the upper surface of the reinforced concrete foundation footing 12 are connected and inserted into this connecting hole, and further for upper and lower retaining walls. The blocks are connected together. In this way, when the large retaining wall block A1 and the secondary large retaining wall block A2 are aligned and joined to each other, the large diameter hole 24a and the secondary large diameter hole 24b communicate with each other, and the retaining wall The small hole 26 for inserting the reinforcing bar, the medium-diameter hole 28, etc. provided in 16 are also communicated with each other, and the connecting reinforcing bar 2 is provided in the communicating hole.
By inserting 0 and filling and solidifying a filler such as mortar, the secondary large retaining wall block A2 is firmly connected to the large retaining wall block A1. That is, it can be inserted from the front wall side to the end side of the retaining wall 16 where earth pressure is most applied so that tensile strength and anti-shrinkage force can act in order, and the rigid body of the entire retaining wall can be improved and the toughness of the entire structure can be improved. Since it also improves the height, it is possible to construct a retaining wall that is higher than the conventional limit height.

As described above, the medium diameter hole 28 for inserting the reinforcing bar is
It is formed as a vertically long hole elongated in the longitudinal direction of the retaining wall 16 in plan view. As a result, the number of reinforcing bars inserted into the holes formed in the retaining wall 16 can be increased,
Moreover, since the retaining wall 16 is formed to be long in the longitudinal direction and a large number of reinforcements are arranged in the same direction, a retaining wall structure having both high compressive strength and high tensile strength can be constructed.

Further, as shown in the reinforcing bar arrangement diagrams of FIGS. 16 to 20, mesh type reinforcing bars 30 are arranged in the front wall 14 to extend from the inside of the front wall 14 to the retaining wall 16 and the expansion wall 22b. Bonded reinforcing bars 32 are arranged. As shown in FIGS. 19 and 20, the joint reinforcing bar 32 is composed of a first reinforcing bar group 34a and a second reinforcing bar group 34b arranged in the height direction.
Each of the reinforcing bar elements of the second reinforcing bar group 34a, 34b has a bent portion 3 at one end thereof for connecting to the mesh type reinforcing bar 30 in the front wall 14.
6a, 36b and straight portions 38a, 3 along the buttress 16.
8b, a hook-shaped bent portion 40c bent along the bulging wall 22b in a clockwise direction in a plan view, and a hook-shaped bent portion 40d bent in a counterclockwise direction in a plan view. This allows
The retaining wall 16 of the secondary large-sized retaining wall block A2 and the bulging wall 22b at the end also have a large tensile strength against earth pressure, which makes it possible to construct a retaining wall middle layer having excellent proof strength.

Further, in the large retaining wall block A1 and the secondary retaining wall block A2, large diameter holes 24a provided in the expansion walls 22a, 22b provided at the ends of the respective retaining walls 16 are provided.
24b is formed so as to have a side or a diameter larger than the thickness width of the retaining wall 16, whereby the expansion wall 2 is expanded.
When many tensile reinforcing bars are inserted into 2a and 22b and mortar or concrete is filled and individualized, the large diameter holes 24a that communicate with each other in the up-down direction are made into concrete pillars and The wall 16 can be supported, and the proof stress of the front wall 14 connected to the buttress 16 can be strongly maintained. That is, not only the earth pressure from the rear side of the retaining wall to the front wall 14 side but also the lateral compressive force and tensile strength of the entire retaining wall can be increased.

21 to 24, a medium-sized retaining wall block A3 for constructing the upper layer portion of the retaining wall construction structure 10 is shown.
It is shown. The medium-sized retaining wall block A3 has a front wall 14 having the same shape as the large-sized retaining wall block A1,
Retaining walls 16, 16 having a short rear surface-side protruding length are projected at positions near both ends on the rear surface side of the front wall 14. This front wall 1
Reinforcing bar 30 is arranged in 4 and further this rebar 3
Bonded reinforcing bars 32, which are connected to 0, are arranged in the retaining wall 16. As shown in FIG. 24, each reinforcing bar element of the connecting reinforcing bar 32 is formed in an elongated U shape. Buttress 1
In each of Nos. 6 and 16, a small hole 26 for inserting a reinforcing bar is formed at a position close to the front wall 14, and a medium diameter hole 28 is formed at a position close to the end.

25 to 28, a small retaining wall block A for constructing the uppermost layer of the retaining wall construction structure 10 is shown.
4 is shown. The small retaining wall block A4 has a front wall 14 having the same shape as that of the large retaining wall block A1, and a retaining wall 16 having a shorter rear side protruding length at positions near both ends on the rear side of the front wall 14, 16 is projected. A mesh type reinforcing bar 30 is also arranged in the front wall 14, and a connecting reinforcing bar 32 connected to the mesh type reinforcing bar 30 is further arranged in the retaining wall 16. As shown in FIG. 25, the connecting rebar 32
Each reinforcing bar element is formed in a short U shape. Further, small holes 26 for inserting the reinforcing bars are opened in the buttresses 16, 16.

As shown in FIGS. 1 and 2, the reinforced concrete foundation footing 12 which is the foundation of the retaining wall construction structure 10 has a front toe 48 for supporting the front side of the retaining wall construction structure 10 and a rear surface thereof. It is preferable that the front toe part 48 is constructed of reinforced concrete so as to include the rear toe part 50 that supports the side, and the front toe part 48 is preferably provided with a leg part 52 extending further downward from the lower surface of the front toe part 48. By supporting the reinforced concrete foundation footing 12 with the leg portions 52, it is not necessary to excavate the lower surface of the reinforced concrete foundation footing 12, and the amount of excavated soil on the rear side of the retaining wall is extremely small in a sloping land, especially in a steep slope. In addition, the height of the body of the retaining wall itself can be reduced, and the construction cost and material cost can be saved accordingly.

Further, as shown in FIG. 29, in each of the large retaining wall blocks A1, secondary large retaining wall blocks A2, medium retaining wall blocks A3, small retaining wall blocks A4, etc. Large-diameter hole 24 provided in 22 and buttress 16
In order to firmly connect and fix the reinforcing bars, the filler, and the like to be inserted on the inner surface side of the medium-diameter hole 28 and the small-diameter hole 26 provided in, it is preferable to provide unevenness or uneven grooves 54 on the circumferential surface of each hole. . The pitch spacing of the grooves may be set arbitrarily, and even if the groove width is larger than that shown in the drawing, an excellent rigid body can be formed, and the intended purpose can be achieved. As a result, the filler such as the mortar filled inside adheres to each block integrally, and the connection strength of each block increases.

Further, in the present embodiment, a large diameter hole 24a for inserting a reinforcing bar, which is opened in the expansion / expansion wall of the large retaining wall block,
Small holes 26 for inserting reinforcing bars of large, medium and small retaining wall blocks, medium diameter holes 28 for inserting reinforcing bars, secondary large diameter holes 24b of secondary large retaining wall block A2 are the inner upper edge side of those holes. Is formed as a taper hole such that the hole diameter decreases from the bottom to the lower edge side. FIG. 30 shows an exaggerated taper angle (degree) θ for easy understanding.

That is, in this embodiment, for example, FIGS.
The width W of the front wall 14 of the large retaining wall block A1 shown in FIG.
The depth D is 00 mm, the depth D on the buttress wall 16 side is 1600 mm, and the height H is 1000 mm, but the diameter of the hole is set to 300 mm on the upper edge side and 290 mm on the lower edge side. In addition, the height H of the small holes for inserting the reinforcing bars of the blocks for medium and small retaining walls is 1000.
The upper edge diameter is 100 mm and the lower edge is 94 mm.
It is set to mm.

In the above example, the taper angle θ is about t
Although the taper gradient is an 0.2 ° to tan 0.3 °, the taper degree is not limited to the above numerical values and may be arbitrarily set according to the retaining wall structure at each construction site. In this way, by stacking the blocks in a large size, a secondary large size, a medium size, and a small size, a structure having a high pressure resistance against the upward pulling force at the joint surfaces of the vertically adjacent blocks is obtained. That is, the shear resistance against the shear force due to the earth pressure is large at the joint surface of each block. Therefore, the retaining wall of the retaining wall where earth pressure is built 1
When the block A4 side for the small retaining wall, which is the side from the 6 side to the front wall 14 side and is above the retaining wall, is pressed to the front side (road side), the block for the large or secondary large retaining wall A1, A
A tensile force is applied to the second side in the direction of pulling the reinforcing bar upward from each hole. At this time, since it is formed as a tapered hole so that the hole diameter of the lower edge is smaller than that of the upper edge, a large strength can be maintained against this tensile force. In particular, when these blocks are laminated, this anti-pulling force is generated at the upper and lower adjoining block joint surfaces, and the overall retaining wall can be made more excellent in toughness.

In the retaining wall construction structure 10, the small holes 26 provided in the retaining wall 16 near the front wall 14 side.
Is the frontmost wall 14 such as each stacked large-sized retaining wall block A1, secondary large-sized retaining wall block A2, and a plurality of medium-sized retaining wall blocks A3 and small retaining wall blocks A4 laminated on the upper surface side thereof. Is placed on the upper surface of the anchor reinforcement 18 and the reinforced concrete foundation footing 12 that are positioned and laminated so as to form a communication hole that directly communicates with the small hole 26 provided on the buttress wall 16 near the side. A connecting reinforcing bar 20 for connecting each of the provided retaining wall blocks is connected and inserted into the communication hole to integrally connect the upper and lower retaining wall blocks. As a result, the small holes 26 are communicated with each other in the retaining wall block from the lowermost stage to the uppermost stage, and are firmly connected and integrated by the anchor reinforcing bars 18 and the connecting reinforcing bars 20 and the fillers inserted therein. It becomes a rigid body, and the retaining wall 10 can be constructed over 10 meters.

As described above, the retaining wall construction structure 10 of the present invention.
Is, for example, the large-diameter retaining wall block A1 is laminated in about 5 steps at the position of the anchor reinforcing bar 18 projecting on the upper surface of the reinforced concrete foundation footing 12, and each large diameter hole 24a for insertion of each reinforcing bar is communicated. The anchor reinforcing bar 18 and the connecting reinforcing bar 20 are fitted into the medium-diameter holes 28 and the small holes 26 to fill and solidify the filler to construct the lower layer portion of the retaining wall, and further to the upper surface of this block for the secondary large retaining wall A2. In the same way, build up the middle layer part of the retaining wall by stacking about 4 steps, and further constructing the upper layer part with about 3 steps of the medium size retaining wall block A3 and building the uppermost part with about 3 steps of the small retaining wall block A4. It is to be constructed, and the reinforcing bars and fillers in the large-diameter holes 24 of the retaining wall 16 of each block in the lower layer portion to the middle layer portion are laminated as concrete columns continuously connected to the reinforced concrete foundation footing 12 to form each front wall 14
It is possible to prevent the front wall 14 from being broken due to earth pressure while holding the inner wall, and further, to insert the reinforcing rod into the medium-diameter hole 2 provided in each retaining wall 16.
8. The retaining wall can be constructed up to a desired height of about 10 meters or more while satisfying the structural theoretical conditions by using the reinforcing bars and fillers fitted in the small holes 26 and the like and having excellent sectional performance.

Further, since the large retaining wall block for constructing the lower layer portion and the middle layer portion also has a large diameter hole in the large expansion wall of the shape, it is light in weight for its shape and can be transported to the site. It has excellent workability and can be formed as a rigid body integrated with the foundation. As a retaining wall construction structure according to the example of the present invention, a retaining wall having a height of about 15 meters could be constructed on site.

[0049]

As described above, according to the retaining wall block of the first aspect, the retaining wall is provided with the front wall and the retaining wall projectingly formed on the back side of the retaining wall. At the end,
A bulging wall bulging in both directions is provided, and at least a large-diameter hole for rebar insertion that communicates with the upper and lower surfaces is opened in the bulging wall, and is connected to the front wall and the retaining wall. Reinforcing bars are arranged and are arranged alternately in the height direction of the first joint reinforcing bar group and the first joint reinforcing bar group arranged from the front portion of the substantially retaining wall to the expansion wall at the rear portion of the retaining wall. A second joint reinforcing bar group disposed from the substantially retaining wall to the expansion wall, each of the first and second coupling reinforcing bar groups intersecting at a position near a connecting portion between the retaining wall and the expansion wall. When used in the lower layer part of the retaining wall structure, the retaining wall block A is fixed to the foundation footing due to a large earth pressure acting on the front wall, by constructing the cross reinforcing bar layer as described above. Even if a tensile force is applied to the retaining wall, the cross reinforcing bar layer causes a reaction force to act inward. In addition to being able to dramatically improve the strength of the wall block itself, in the retaining wall construction structure using the same retaining wall block, it is possible to increase the strength of the entire retaining wall by making it function as the overall tensile strength. Become.

In addition, according to the retaining wall block of the second aspect, the front wall and the retaining wall projectingly formed on the back side of the front wall are provided, and both ends of the retaining wall have both ends. A bulging wall bulging in the direction is provided, and at least in the bulging wall,
A large-diameter hole that communicates with the upper and lower surfaces is opened, and the front wall and the connecting rebar arranged in the buttress wall are provided from the front portion of the approximately buttress wall to the expansion wall at the rear portion of the buttress wall. A first connecting rebar group and a second connecting rebar group that are alternately provided in the height direction of the first connecting bar group and are arranged from the substantially same buttress to the expansion wall. Along with forming a cross-reinforcing layer by arranging so as to intersect at a position near the connection portion with the wall expansion, the cross-reinforcing layer is provided alternately in the height direction,
The third joint rebar groups arranged from the front part of the substantially buttress wall to the expansion wall at the rear part of the buttress wall, and the third joint bar groups are alternately provided in the height direction of the third joint bar and expand from the substantially buttress wall. By having the opposing reinforcing layer composed of the fourth combined rebar group arranged over the wall, the retaining wall block is subjected to a large earth pressure on the front wall and is, for example, a restraint fixed to the foundation footing. Even if a tensile force acts on the wall and bulges outward, the cross reinforcing bar layer exerts an inward force on the wall and absorbs the force, thereby preventing the buttress from breaking.

Further, according to the retaining wall block of the third aspect, the front wall and the retaining wall projectingly formed on the back side of the front wall are provided, and the retaining wall has an end portion on both sides. A bulging wall that bulges in the direction is provided, and a large-diameter hole for inserting a reinforcing bar that communicates with the upper and lower surfaces is opened in the expanding wall, and the retaining wall has a reinforcing bar that communicates with the upper and lower surfaces. A plurality of holes for insertion are opened, and a taper surface is provided on the end surface side of these holes so that the diameter of the holes is larger than that of the holes. As a result of the close-bonding, the filling capacity of mortar or concrete as a filler is increased, and the structure strength corresponding to so-called proper fogging can be reinforced.

According to the present invention, a large anti-shrink rebar is provided on the front side of the front wall of the retaining wall block, so that the anti-shrink force applied to the front wall of the block is reduced. Can withstand and improve the strength of the constructed retaining wall.

According to a fifth aspect of the present invention, the large diameter hole for inserting the reinforcing bar or a plurality of other holes for inserting the reinforcing bar have a small diameter from the upper edge side to the lower edge side of the inside of these holes. By being formed as such a tapered hole, it is possible to provide a block for forming a building structure having high pressure resistance against earth pressure from the buttress wall side to the front wall side, that is, tensile force upward.

Next, according to the construction of the retaining wall according to claim 6, a large retaining wall block having a front wall and a retaining wall projecting from the rear side of the front wall is used as a basic footing. It is arranged on the upper surface, and on the upper surface of this large-sized retaining wall block, a plurality of retaining-wall blocks that are shorter than the large-sized retaining wall block in the rear side projecting length of the retaining wall are stacked and constructed. At the end of the retaining wall of the large retaining wall block, a bulging wall bulging in both directions is provided, and at least in the bulging wall, a large diameter hole for inserting a reinforcing bar communicating with the upper and lower surfaces is provided. Is opened,
Further, a small hole for rebar insertion is provided in the buttress wall closest to the front wall side, and an intermediate position between the small hole and the large diameter hole is larger than the small hole and smaller than the large diameter hole. The small hole provided on the buttress wall closest to the front wall side is provided with a small diameter hole, and the small hole is provided at the buttress wall closest to the front wall side of the large retaining wall block and the plurality of retaining wall blocks stacked on the upper surface side thereof. Connection for connecting the anchor reinforcing bars projecting from the foundation footing and the retaining wall blocks mounted on the top surface of the foundation footing, which are positioned and laminated so as to form a communication hole that directly communicates with the small hole provided in By connecting and inserting the reinforcing bar into this communication hole and integrally connecting the upper and lower retaining wall blocks, the tensile strength and the compressive strength are increased in order from the front wall side to the end side of the retaining portion where earth pressure acts most. Reinforcing bars can be inserted and retained so that force can act. Since the improve the overall rigid also to improve the toughness of the entire structure simultaneously, higher retaining walls than conventional limit height can be constructed.

According to the seventh aspect, the large diameter hole provided in the expansion wall is formed so as to have a side or a diameter larger than the thickness width of the retaining wall. By inserting many tensile reinforcing bars in the wall and solidifying with mortar or concrete, not only the earth pressure from the back side of the retaining wall to the mirror surface side, but also the compressive force from the left and right direction of the entire retaining wall,
The tensile strength can also be increased.

According to the eighth aspect, since the medium-diameter hole is formed as a vertically elongated hole elongated in the longitudinal direction of the retaining wall in plan view, more reinforcing bars can be inserted,
In addition to strengthening the retaining wall, the retaining wall structure is formed long in the longitudinal direction of the retaining wall and arranged in a large number in the same direction, so that it is possible to obtain a retaining wall structure having both high compressive strength and high tensile strength.

According to a ninth aspect of the present invention, the secondary large-sized retaining wall is formed on the upper surface of the large-sized retaining wall block so that the rear side protruding length of the buttress is shorter than that of the large-sized retaining wall block. Block is mounted, the expansion wall of the secondary large retaining wall block is formed smaller than the expansion wall of the large retaining wall block, and the secondary large diameter of the secondary large retaining wall block is large. The hole is formed smaller than the large-diameter hole of the large retaining wall block, and the secondary large-diameter hole is laminated so that it is located approximately in the front wall side half of the large-diameter hole of the large retaining wall block. Since it has a sectional force that increases in a quadratic curve due to a linear pressure that increases linearly along the lower side, it is possible to create a triangular distribution of earth pressure while also considering economic efficiency. Within the expansion wall, while satisfying the need to form a retaining wall block that can accommodate To satisfy the condition that communicates the mold retaining wall blocks and a secondary large retaining wall blocks, can be constructed most complete retaining wall structure.

According to the tenth aspect of the present invention, a reinforcing bar, a filler or the like to be inserted is firmly attached to the inner surface side of the large diameter hole provided in the expansion wall, the medium diameter hole or the small diameter hole provided in the retaining wall. By providing unevenness or uneven grooves for connecting and fixing to the mortar, it is possible to prevent the mortar and concrete from slightly contracting and moving due to external force after filling, and the filling material adheres integrally to each block. As a result, the connection strength of each block increases.

According to the eleventh aspect, the large-diameter holes for inserting the reinforcing bars, the small holes for inserting the reinforcing bars, the medium-diameter holes, and the secondary large-diameter holes are formed from the inner upper edge side of the holes toward the lower edge side. By being formed as a tapered hole with a small hole diameter,
A large shear resistance can be maintained at the joint surfaces of the blocks that are vertically adjacent to each other, so that a structure with high pressure resistance can be formed even against earth pressure from the buttress wall side to the front wall side, that is, upward pulling force. It becomes possible, and the whole retaining wall becomes more excellent in toughness.

According to a twelfth aspect, the foundation footing includes a front toe portion supporting the front surface side of the retaining wall body to be constructed and a rear toe portion supporting the rear surface side of the retaining wall body. Since the leg portion is provided with a leg portion extending further downward from the lower surface of the front toe portion, it is not necessary to excavate the lower surface of the foundation footing while maintaining sufficient base support strength by the leg portion, In a steep slope, the amount of excavated soil on the rear side of the retaining wall can be extremely reduced, the height of the retaining wall frame can be reduced, and the construction cost and material cost can be saved accordingly.

[Brief description of drawings]

FIG. 1 is a perspective view of a construction structure of a retaining wall according to an embodiment of the present invention.

FIG. 2 is a vertical sectional side view of a construction structure of a retaining wall.

FIG. 3 is a plan view of a large retaining wall block.

FIG. 4 is a front view of a large retaining wall block.

FIG. 5 is a vertical cross-sectional view of a large retaining wall block at a buttress wall position.

FIG. 6 is a plan view showing a reinforcing bar arrangement state of a large retaining wall block.

FIG. 7 is a front view showing a reinforcing bar arrangement state in a front wall of a large retaining wall block.

FIG. 8 is a side view showing a reinforcing bar arrangement state in a retaining wall of a large retaining wall block.

FIG. 9 is a plan view showing a cross reinforcement layer in a retaining wall of a large retaining wall block.

10 is a plan view showing a state in which the reinforcing bar elements of the first and second combined reinforcing bar groups of the cross reinforcing bar layer of FIG. 9 are separated into right and left.

FIG. 11 is a plan view showing an opposing reinforcing layer in a retaining wall of a large retaining wall block.

FIG. 12 is a plan view showing a state where the reinforcing bar elements of the third and fourth combined reinforcing bar groups of the facing reinforcing bar layer of FIG. 11 are separated left and right.

FIG. 13 is a plan view of a block for a secondary large retaining wall.

FIG. 14 is a front view of a block for a secondary large retaining wall.

FIG. 15 is a vertical cross-sectional view of the secondary large retaining wall block at the buttress position.

FIG. 16 is a plan view showing the reinforcing bar arrangement of the secondary large retaining wall block.

FIG. 17 is a front view showing a bar arrangement state of the front wall of the secondary large retaining wall block.

FIG. 18 is a side view showing a bar arrangement state of a buttress wall of a secondary large retaining wall block.

FIG. 19 is a plan view showing a bar arrangement state of a retaining wall of a secondary large retaining wall block.

20 is a plan view showing a state where the reinforcing bar elements of the first and second combined reinforcing bar groups shown in FIG. 19 are separated into the left and right.

FIG. 21 is a front view of a medium-sized retaining wall block.

FIG. 22 is a vertical cross-sectional view of the retaining wall position of the medium-sized retaining wall block.

FIG. 23 is a plan view of a reinforcing bar of a medium-sized retaining wall block in a reinforced state.

FIG. 24 is a plan view showing a bar arrangement state of a buttress wall of a medium-sized retaining wall block.

FIG. 25 is a front view of the small retaining wall block.

FIG. 26 is a vertical cross-sectional view of the small retaining wall block at the buttress position.

FIG. 27 is a plan view showing a reinforcing bar arrangement state of a small retaining wall block.

FIG. 28 is a plan view showing a reinforcing bar arrangement state in a retaining wall of a small retaining wall block.

FIG. 29 is a vertical cross-sectional view at the buttress wall position showing a vertically joined state of the large retaining wall block.

FIG. 30 is an explanatory diagram showing a taper angle θ of each hole.

[Explanation of sign]

 10 Construction structure of retaining wall 12 Foundation footing 14 Front wall 16 Retaining wall 18 Anchor reinforcing bar 20 Connecting reinforcing bar 22 Expanding wall 24 Large diameter hole for inserting reinforcing bar 26 Small hole for inserting reinforcing bar 28 Medium diameter hole for inserting reinforcing bar 32 Connection reinforcing bar 34 Connection Reinforcing bar group 42 Cross reinforcing layer 44 Opposing reinforcing layer 46 Tapered surface 47 Anti-shrinking bar 48 Front toe 50 Back toe 52 Uneven groove 54 Leg A Block for retaining wall K Cross

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] February 17, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Name of item to be corrected] 0005

[Correction method] Change

[Correction content]

[0005]

In order to achieve the above object, the present invention comprises a front wall 14 and a buttress 16 projectingly formed on the back side of the front wall 14, and the buttress is provided. A bulging wall 22 bulging in both directions is provided at the end of 16
At least, this is膨拡wall 22, reinforcing bar insertion large-diameter hole 24 communicating with are opened in upper and lower surfaces, and the front wall 14, is in the buttresses 16 reinforcing bar 32 is arranged, the front wall 14 to the expansion wall 22 at the rear of the retaining wall 16 and the first joint reinforcing bar group 34a and the front wall 14 expanding wall 22 alternately provided in the height direction of the first joint reinforcing bar group 34a. And a second combined rebar group 34b arranged over
Each of the second joint rebar groups is composed of a retaining wall block A formed by forming a cross rebar layer 42 by being reinforced so as to intersect in the vicinity of the connection portion between the retaining wall and the expansion wall. .

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction content]

Further, the front wall 14 and a retaining wall 16 projectingly formed on the back side of the front wall 14 are provided. At the end of the retaining wall 16, a bulging wall 22 bulging in both directions is provided. Is provided,
At least a large-diameter hole 24 communicating with the upper and lower surfaces is opened in the expansion wall 22, and the front wall 14 and the joint reinforcing bar group 32 arranged in the retaining wall 16 are the same as the front wall. A first combined rebar group 34 arranged to the expansion wall 22 at the rear of the buttress wall.
a and a second joint reinforcing bar group 34b which are alternately provided in the height direction of the first joint reinforcing bar group 34a and are arranged from the front wall to the expansion wall, and the connection between the retaining wall and the expansion wall. Are laid out so as to intersect at a position near the cross section,
And a third joint reinforcing bar group 34c that is provided in the height direction of the cross reinforcing layer 42 and is arranged from the front wall to the expansion wall at the rear of the retaining wall, and the third joint reinforcing bar group. Blocks A for the retaining wall, which are provided alternately with each other in the height direction of 34c, and have an opposing reinforcing layer 44 composed of a fourth joint reinforcing bar group 34b arranged from the front wall to the expansion wall .

[Procedure amendment 4]

[Document name to be amended] Statement

[Name of item to be corrected] 0023

[Correction method] Change

[Correction content]

As shown in the reinforcing bar diagrams of FIGS. 6 to 12, a mesh type reinforcing bar 30 is arranged in the front wall 14 of the retaining wall block A, and is connected from the front wall 14 into the retaining wall 16. Reinforcing bars 32 are provided. The connecting rebar 32 extends from the front wall 14 to the expansion / expansion wall 22a , and a plurality of first reinforcing bars 32 are arranged in the height direction .
It is provided with a combination reinforcing bar group 34a and a second combination reinforcing bar group 34b which are provided alternately in the height direction of the first combination reinforcing bar group 34a and are arranged from the front wall 14 to the expansion wall 22a.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

In this embodiment, as shown in FIGS. 11 and 12, the opposing reinforcing layer 4 is arranged in the height direction of the cross reinforcing layer 42.
4 are alternately arranged. This opposing reinforcement layer 44
Is a third wall arranged from the front wall 14 to the expansion wall 22a.
It is composed of a combined reinforcing bar group 34c and a fourth combined reinforcing bar group 34b which are alternately provided in the height direction of the third combined reinforcing bar group 34c and are arranged from the front wall 14 to the expansion wall 22a.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0049

[Correction method] Change

[Correction content]

[0049]

As described above, according to the retaining wall block of the first aspect, the retaining wall is provided with the front wall and the retaining wall projectingly formed on the back side of the retaining wall. At the end,
A bulging wall that bulges in both directions is provided, and at least a large-diameter hole for rebar insertion that communicates with the upper and lower surfaces is opened in the bulging wall, and the front wall and the retaining wall are joined with a reinforcing bar. And a first joint reinforcing bar group disposed from the front wall to the rear expanding wall of the retaining wall, and the first joint reinforcing bar group are alternately provided in the height direction of the first joint reinforcing bar group from the front wall to the expanding wall. The second installed over
And a connecting reinforcing bar group, wherein each of the first and second connecting reinforcing bar groups is arranged so as to intersect at a position near a connecting portion between the retaining wall and the expansion wall to form a cross reinforcing bar layer. Therefore, when the retaining wall structure is used as a lower layer portion of the retaining wall structure, the retaining wall block A has the above-mentioned cross even if a large earth pressure acts on the front wall and a tensile force acts on the retaining wall fixed to the foundation footing. The reaction force acts inwardly by the reinforcing bar layer and the strength of the retaining wall block itself can be dramatically improved, and in the retaining wall construction structure using the retaining wall block, the overall tensile strength As a result, the strength of the entire retaining wall can be increased.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0050

[Correction method] Change

[Correction content]

In addition, according to the retaining wall block of the second aspect, the front wall and the retaining wall projectingly formed on the back side of the front wall are provided, and both ends of the retaining wall have both ends. A bulging wall bulging in the direction is provided, and at least in the bulging wall,
A large-diameter hole communicating with the upper and lower surfaces is opened, and the front wall and the connecting rebar arranged in the retaining wall are the first coupling arranged from the front wall to the expansion wall at the rear of the retaining wall. It has a reinforcing bar group and a second connecting bar group alternately provided in the height direction of the first connecting bar group and arranged from the front wall to the expansion wall, and a connecting portion between the retaining wall and the expanding wall. A cross reinforcement layer is formed by crossing the cross sections at a position close to the cross wall, and the cross reinforcement layers are alternately arranged in the height direction of the cross reinforcement layer from the front wall to the expansion wall at the rear of the retaining wall. A third joint rebar group provided,
And an opposing reinforcing layer composed of a fourth joint reinforcing bar group alternately provided in the height direction of the third joint reinforcing bar group and arranged from the front wall to the expansion wall. As a result, the retaining wall block is subjected to a large earth pressure on the front wall and is fixed to the foundation footing, for example. Acts to absorb this and prevent the buttress from breaking. ─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] October 5, 1993

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be amended] Claims

[Correction method] Change

[Correction content]

[Claims]

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction content]

The front wall 14 and a retaining wall 16 projectingly formed on the back side of the front wall 14 are provided.
A bulging wall 22 bulging in both directions is provided at the end of the bulge, and a large diameter hole 24 for rebar insertion that communicates with the upper and lower surfaces is opened in the bulging wall 22 and the above the wall 16, a plurality of holes for reinforcing bars inserted in communication with the upper and lower surfaces are apertured, for retaining wall formed by the tapered surface 46 is provided so as to diameter than the holes in the upper and lower end surface side of the holes You may comprise from a block.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Further, the large-diameter holes for inserting the reinforcing bars or a plurality of other holes for inserting the reinforcing bars are formed as tapered holes such that the diameter of the holes decreases from the upper edge side to the lower edge side. Is also good.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0010

[Correction method] Change

[Correction content]

Next, a large retaining wall block A1 having a front wall 14 and a retaining wall 16 projectingly formed on the back side of the front wall 14 is arranged on the upper surface of the reinforced concrete foundation footing 12, and the large size On the upper surface of the retaining wall block A1, the retaining wall blocks A2, A3, and A4 each having a shorter rear wall protruding length than the large retaining wall block are stacked in a plurality of layers to be constructed, A bulging wall 22 bulging in both directions is provided at the end of the retaining wall of the large retaining wall block,
At least in the expansion wall 22, a large diameter hole 24 for inserting a reinforcing bar communicating with the upper and lower surfaces is opened, and a small hole 26 for inserting a reinforcing bar is provided in the retaining wall closest to the front wall side. , greater than the small holes 26 in an intermediate position between the small hole 26 and the large diameter hole 24, and includes a large diameter hole 2 less than 4 in-diameter hole 28, the buttresses closer to the most front wall side The small hole 26 provided is the small hole 26 provided in the retaining wall 16 closest to the front wall side of the large retaining wall block A1 and the plurality of retaining wall blocks A2, A3, A4 stacked on the upper surface side thereof. coupling reinforcing bars and positioned laminated so as to form a communicating hole communicating with the straight, connecting each retaining wall blocks No設anchor rebar 18 and reinforced concrete foundation footing 12 upper surface projecting from reinforced concrete foundation footing 12 20 and this It is composed of a building structure 10 in which the upper and lower retaining wall blocks are integrally connected by being inserted through the communication hole.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0013

[Correction method] Change

[Correction content]

Among the retaining wall blocks laminated on the upper surface of the large retaining wall block A1, the large retaining wall block is
A block A2 for a secondary large retaining wall, which has a shorter projecting length on the back side of the retaining wall 16 than the block for a large retaining wall, is placed directly above the rack A1. The expansion wall 16 of the wall block is formed smaller than the expansion wall 16 of the large retaining wall block A1, and the secondary large diameter hole 24b of the secondary large retaining wall block is the same as the large retaining wall block. The secondary large-diameter hole may be formed smaller than the large-diameter hole 24a, and the secondary large-diameter hole may be formed by stacking so as to be located substantially in the front half of the large-diameter hole of the large retaining wall block on the front wall 14 side. Good.

[Procedure correction 6]

[Document name to be amended] Statement

[Correction target item name] 0014

[Correction method] Change

[Correction content]

Also, the large diameter hole 2 provided in the expansion wall 16
4a, 24b, on the inner surface side of the diameter hole 26 or the small-diameter hole 28 in which is provided on the buttresses 16, irregularities for rigidly connecting and fixing reinforcing bars and filler or the like to be inserted or uneven groove 5 4 is provided It may be composed of

[Procedure Amendment 7]

[Document name to be amended] Statement

[Name of item to be corrected] 0015

[Correction method] Change

[Correction content]

The block A1 for the large retaining wall and the secondary
Double deposited on an upper large retaining wall blocks A2 further
Number of retaining wall blocks A3, A4. ． ． The reinforcing bar insertion large diameter hole 24a, the reinforcing bar insertion small hole 28, the medium diameter hole 26, and the secondary large diameter hole 24b are tapered such that the hole diameter decreases from the inner upper edge side to the lower edge side. It may be formed as a hole. Also, a large diameter for inserting the reinforcing bar
Hole, small hole for reinforcing bar insertion, medium diameter hole, upper and lower end surface side of secondary large diameter hole
Is provided with a tapered surface 46 so as to have a diameter larger than that of the hole.
It may be composed of

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0016

[Correction method] Change

[Correction content]

Further, the reinforced concrete foundation footing 12 includes a front toe portion 48 for supporting the front surface side of the retaining wall body to be constructed and a rear toe portion 50 for supporting the rear surface side thereof.
The front toe portion 48 may be provided with a leg portion 54 extending further downward from the lower surface of the front toe portion.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction content]

Also, in the large retaining wall block A1 and the secondary retaining wall block A2, large diameter holes 24a provided in retaining expansion walls 22a and 22b provided at the end portions of the retaining walls 16 are provided.
24b is formed so as to have a side or a diameter larger than the thickness width of the retaining wall 16, whereby the expansion wall 2 is expanded.
When many tensile reinforcing bars are inserted into 2a and 22b and mortar or concrete is filled and solidified, the large diameter holes 24a and the secondary large diameter holes 24b that communicate vertically are formed into concrete columns to form a retaining wall. 16 can be supported, and the proof stress of the front wall 14 continuous with the buttress 16 can be strongly maintained. That is, not only the earth pressure from the rear side of the retaining wall to the front wall 14 side but also the lateral compressive force and tensile strength of the entire retaining wall can be increased. Further, as shown in FIG. 16, this secondary retaining wall block
As for Block A2, similar to Block A for retaining wall, retaining wall expansion
Large-diameter hole 24b for inserting rebar and a retaining wall
On the upper and lower end face sides of the plurality of holes for inserting the reinforcing bar which are opened in 16
The tapered surface 46 is formed so as to expand from the same hole,
As a result, the joint surface that joins the retaining wall blocks is
The taper surfaces 46 of are to be closely joined to each other.
A substantially diamond-shaped peripheral shape is formed, and the
The filling capacity of concrete and concrete increases,
This is to reinforce the structure strength corresponding to "fog".
It

[Procedure Amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0039

[Correction method] Change

[Correction content]

21 to 24, a medium-sized retaining wall block A3 for constructing the upper layer portion of the retaining wall construction structure 10 is shown.
It is shown. The medium-sized retaining wall block A3 has a front wall 14 having the same shape as the large-sized retaining wall block A1,
Retaining walls 16, 16 having a short rear surface-side protruding length are projected at positions near both ends on the rear surface side of the front wall 14. This front wall 1
Reinforcing bar 30 is arranged in 4 and further this rebar 3
Bonded reinforcing bars 32, which are connected to 0, are arranged in the retaining wall 16. As shown in FIG. 24, each reinforcing bar element of the connecting reinforcing bar 32 is formed in an elongated U shape. Further, in the buttresses 16 and 16, a small hole 26 for inserting a reinforcing bar is formed at a position near the front wall 14, and a medium diameter hole 28 is formed at a position near the end. As shown in FIG. 22, this medium-sized retaining wall block
Also for A3, for inserting rebar of medium diameter hole 28 and each small hole 26
On the upper and lower end surfaces of the multiple holes of the
The packing surface 46 is formed and the filling material is formed as described above.
The filling capacity of all mortar and concrete increases,
Reinforce the structure strength corresponding to the appropriate "fog"
Naru

[Procedure Amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction content]

25 to 28, a small retaining wall block A for constructing the uppermost layer of the retaining wall construction structure 10 is shown.
4 is shown. The small retaining wall block A4 has a front wall 14 having the same shape as that of the large retaining wall block A1, and a retaining wall 16 having a shorter rear side protruding length at positions near both ends on the rear side of the front wall 14, 16 is projected. A mesh type reinforcing bar 30 is also arranged in the front wall 14, and a connecting reinforcing bar 32 connected to the mesh type reinforcing bar 30 is further arranged in the retaining wall 16. As shown in FIG. 25, the connecting rebar 3
Each rebar element 2 is formed in a short U shape. Further, small holes 26 for inserting the reinforcing bars are opened in the buttresses 16, 16. As shown in FIG. 26, this small retaining wall block A4
Also, regarding the small hole 26 for inserting the reinforcing bar, the same hole is provided on the upper and lower end face sides.
The tapered surface 46 is formed so as to have a larger diameter.
This is preferably because of the mortar and conc.
The filling capacity of the cleats has increased and so-called
It is possible to reinforce the structure strength corresponding to "ri".

[Procedure Amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0042

[Correction method] Change

[Correction content]

Further, as shown in FIG. 29, each large retaining wall blocks A1,2 primary large retaining wall blocks A2, middle- retaining wall block A3, in a small retaining wall blocks A4, etc., if necessary Large diameter hole 2 provided in the expansion wall 22
4. In order to firmly connect and fix the reinforcing bars, the filler, and the like to be inserted on the inner surface side of the medium diameter hole 28 and the small diameter hole 26 provided in the retaining wall 16, unevenness or uneven groove 54 is formed on the circumferential surface of each hole. Is preferably provided. The pitch spacing of the grooves may be set arbitrarily, and even if the groove width is larger than that shown in the drawing, an excellent rigid body can be formed, and the intended purpose can be achieved. As a result, the filler such as mortar filled inside adheres integrally to each block, increasing the connecting strength of each block.

[Procedure Amendment 13]

[Document name to be amended] Statement

[Name of item to be corrected] 0045

[Correction method] Change

[Correction content]

In the above example, the taper angle θ is about t
Although the taper gradient is an 0.2 ° to tan 0.3 °, this taper angle is not limited to the above numerical values, and may be arbitrarily set according to the retaining wall structure at each construction site. In this way, by stacking the blocks in a large size, a secondary large size, a medium size, and a small size, a structure having a high pressure resistance against the upward pulling force at the joint surfaces of the vertically adjacent blocks is obtained. That is, the shear resistance against the shear force due to the earth pressure is large at the joint surface of each block. Accordingly, when the small retaining wall block A4 side, which is the retaining wall 16 side of the retaining wall where the earth pressure is built and extends from the retaining wall 16 side to the front side (road side), is above the retaining wall, Large or secondary large retaining wall block A
Tensile force is applied to the No. 1 and A2 sides in the direction of pulling the reinforcing bar upward from each hole. At this time, since it is formed as a tapered hole so that the hole diameter of the lower edge is smaller than that of the upper edge, a large strength can be maintained against this tensile force. In particular, when these blocks are laminated, this anti-pulling force is generated at the upper and lower adjoining block joint surfaces, and the overall retaining wall can be made more excellent in toughness. In addition, blocks like the above
From the top surface to the bottom surface of the
With the taper hole structure of
Block A1 and the secondary retaining wall block stacked on top of it.
Block A2, medium size retaining wall block A3, small retaining wall block
Reinforcing bar A4 with holes in the expansion walls 22a and 22b
Large-diameter holes 2424a, 24b for insertion and holes in the retaining wall 16
On the upper and lower end face sides of the plurality of holes 28, 26 for inserting the rebar
When forming the tapered surface 46 so as to expand the diameter from the same hole, it is possible to increase the filling capacity of the mortar or concrete as the filling material while adhering the joining surfaces of the retaining wall blocks closely to each other, and to perform a proper “fogging”. It secures the quantity and reinforces the strength of the structure. Especially, each block has a size of 1
When building a retaining wall with a height, front wall width, depth, etc. of m or more, securing the "fog" amount by the taper surface 46 is extremely effective, and in combination with the taper angle θ of the upward spread. It is possible to maintain high strength in a large retaining wall construction structure. The above, for building structures, large retaining wall block, in the upper part of the secondary large retaining wall blocks, medium retaining wall block, has been described by three types of block stacked structure of small retaining wall blocks, Not limited to this
A range that does not depart from the essence of the invention described in the claims.
In addition, 4, 5, 6 or more types of
The racks may be laminated.

[Procedure Amendment 14]

[Document name to be amended] Statement

[Correction target item name] 0059

[Correction method] Change

[Correction content]

According to claim 11, the large retaining wall
Block, block for secondary large retaining wall, and above
The reinforcing bar insertion large-diameter hole, the reinforcing bar insertion small hole, the medium-diameter hole, and the secondary large-diameter hole of the plurality of laminated retaining wall blocks have inner hole diameters from the upper edge side to the lower edge side. Because it is formed as a tapered hole that becomes smaller, it hardens
Of reinforced concrete columns (or of reinforced concrete and cement mortar)
Rigid body) force to slide downward in the rebar insertion hole
Can prevent the formation of a kind of rigid body
It will build a strong and strong wall. According to claim 12, the large diameter hole for inserting the reinforcing bar and the small hole for inserting the reinforcing bar
On the end face side of the hole, medium diameter hole and secondary large diameter hole, expand the diameter from the same hole.
As the tapered surface is provided, the retaining wall block
The joint surface that joins these taper surfaces makes close contact.
Mortar or cement as the filling material
The filling capacity of the cleat is increased, and so-called proper fogging is achieved.
The corresponding retaining wall strength can be reinforced.

[Procedure Amendment 15]

[Document name to be amended] Statement

[Correction target item name] 0060

[Correction method] Change

[Correction content]

[0060] Furthermore, according to claim 1 3, wherein the foundation footing includes a foot portion before supporting the front side of the retaining wall body constructed, and a foot portion after supporting the rear face side, the front The toe portion is provided with a leg portion that extends further downward from the lower surface of the front toe portion, so that it is not necessary to excavate the lower surface of the foundation footing while maintaining sufficient base support strength by the leg portion, Particularly in a steep slope, the amount of excavated soil on the rear side of the retaining wall can be extremely reduced, and the height of the retaining wall structure can be reduced, which can save construction costs and material costs.

[Procedure Amendment 16]

[Document name to be corrected] Drawing

[Correction target item name] Figure 15

[Correction method] Change

[Correction content]

FIG. 15

[Procedure Amendment 17]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 16

[Correction method] Change

[Correction content]

FIG. 16

[Procedure 18]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 22

[Correction method] Change

[Correction content]

FIG. 22

[Procedure Amendment 19]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 23

[Correction method] Change

[Correction content]

FIG. 23

[Procedure amendment 20]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 26

[Correction method] Change

[Correction content]

FIG. 26

[Procedure correction 21]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 30

[Correction method] Change

[Correction content]

FIG. 30

Claims (12)

[Claims] 1. A front wall and a retaining wall projectingly formed on the back side of the front wall, wherein an end portion of the retaining wall is provided with a bulging wall that bulges in both directions. At least in this expansion wall, a large-diameter hole for inserting a reinforcing bar that communicates with the upper and lower surfaces is opened, a connecting reinforcing bar is arranged in the front wall and the retaining wall, and the connecting reinforcing bar is a substantially retaining wall. Of the first connecting rebars arranged from the front part of the front wall to the expanding wall of the rear part of the retaining wall and the first connecting rebar groups alternately arranged in the height direction of the first connecting bar And a second combined reinforcing bar group, wherein each of the first and second combined reinforcing bar groups is reinforced so as to intersect at a position near a connecting portion between the buttress wall and the expansion wall to form a cross reinforcing bar layer. Retaining wall block formed by forming. 2. A front wall and a retaining wall projectingly formed on the back side of the front wall, wherein the end of the retaining wall is provided with a bulging wall that bulges in both directions. A large-diameter hole communicating with the upper and lower surfaces is opened in the expanded wall, and the front wall and the connecting rebar arranged in the buttress wall are substantially from the front part of the buttress wall to the A first joint rebar group disposed on the rear expanding wall and a second joint rebar group alternately arranged in the height direction of the first joint reinforcing bar and arranged substantially from the retaining wall to the rear expanding wall. And crossing at a position near the connecting portion of the buttress wall and the expansion wall to cross each other to form a cross reinforcing layer, and the cross reinforcing layers are alternately provided in the height direction. , A third group of reinforcing bars arranged from the front of the substantially retaining wall to the expansion wall at the rear of the retaining wall, and in the height direction of the third group of reinforcing rods. Mutually provided for constructing the retaining wall block comprising a facing reinforcement layer made of a fourth reinforcing bar groups arranged toward 膨拡 wall from the substantially buttresses. 3. A front wall and a retaining wall projectingly formed on the back side of the front wall, and an expanding wall bulging in both directions is provided at an end of the retaining wall. In the expansion wall, a large-diameter hole for rebar insertion that is in communication with the upper and lower surfaces is opened, and a plurality of holes for rebar insertion that are in communication with the upper and lower surfaces are opened in the retaining wall. A retaining wall block in which a tapered surface is provided on the end face side of the hole so as to have a diameter larger than that of the hole. 4. The retaining wall block according to claim 1, 2 or 3, wherein a large anti-shrink bar is arranged on the front side of the front wall. 5. The large-diameter hole for inserting a reinforcing bar or a plurality of other holes for inserting a reinforcing bar is formed as a tapered hole in which the hole diameter decreases from the upper edge side to the lower edge side inside the holes. The retaining wall block according to claim 1, 2, 3 or 4. 6. A large retaining wall block having a front wall and a retaining wall projectingly formed on the back side of the front wall is disposed on the upper surface of the foundation footing, and the large retaining wall block has an upper surface. ,
The back side projecting length of the retaining wall is shorter than this large retaining wall block, and a plurality of retaining wall blocks that are formed to be laminated are constructed, and at the end of the retaining wall of the large retaining wall block, A bulging wall that bulges in both directions is provided, and at least inside this bulging wall, a large-diameter hole for rebar insertion that communicates with the upper and lower surfaces is opened, and further, in the buttress wall closest to the front wall side. Is provided with a small hole for inserting a reinforcing bar, and an intermediate diameter hole larger than the small hole and smaller than the large diameter hole is provided at an intermediate position between the small hole and the large diameter hole. The small hole provided in the close buttress wall directly communicates with the small hole provided in the butted wall closest to the front wall side of the large retaining wall block and multiple retaining wall blocks stacked on the upper surface side. Anchor reinforcements that are positioned and laminated so as to form communication holes that A retaining wall construction structure in which a connecting rebar connecting each retaining wall block placed on the upper surface of the foundation footing is connected and inserted into the communication hole to integrally connect the upper and lower retaining wall blocks. 7. The retaining wall construction structure according to claim 5, wherein the large-diameter hole provided in the expansion wall has a side or a diameter larger than the thickness width of the retaining wall. 8. The medium-diameter hole is formed as a vertically elongated hole elongated in the longitudinal direction of the retaining wall in plan view.
Building structure of the retaining wall described. 9. A secondary large-sized retaining wall block, on the upper surface of the large-sized retaining wall block, having a shorter rear wall projecting length than the large-sized retaining wall block is mounted. The expansion wall of the secondary large retaining wall block is formed smaller than the expansion wall of the large retaining wall block, and the secondary large diameter hole of the secondary large retaining wall block is the large retaining wall block. 6. The secondary large diameter hole is formed so as to be smaller than the large diameter hole, and the secondary large diameter hole is laminated so as to be positioned substantially in the front half of the large diameter hole of the large retaining wall block. Retaining wall construction structure. 10. An inner surface of a large-diameter hole provided in the expansion wall, a medium-diameter hole or a small-diameter hole provided in the retaining wall, for firmly connecting and fixing the rebar or filler to be inserted. The retaining wall construction structure according to claim 5, wherein the structure is provided with unevenness or uneven grooves. 11. The reinforcing bar insertion large diameter hole, the reinforcing bar insertion small hole, the medium diameter hole, and the secondary large diameter hole are tapered such that the hole diameter becomes smaller from the inner upper edge side to the lower edge side of the hole. The retaining wall construction according to claim 5, 6, 7, 8, 9 or 10, which is formed as a hole. 12. The foundation footing includes a front toe portion supporting a front surface side of a retaining wall body to be constructed and a rear toe portion supporting a rear surface side thereof, the front toe portion including the front toe portion. The retaining wall construction structure according to claim 5, further comprising a leg portion extending further downward from the lower surface of the portion.