JPH10280442A - Retaining wall block having combined structure and retaining wall construction method using same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a dislocation or a separation for providing the quickness of a work by attaining a surely combined state, provide a retaining wall block combination structure improving free-standing stability and enhancing the safety of the work, and further provide a retaining wall construction method capable of reducing construction cost. SOLUTION: Retaining wall blocks 3 are spread all over a slope S along a road, a river, a coast, a railroad track or the like in both vertical and horizontal directions for the coverage thereof. In this case, the upper and lower surfaces of each retaining wall block 3 are inclined at the prescribed angle with a horizontal plane, and a combining projection 7 is formed on the upper surface of the retaining wall block 3, so as to be vertically extended and projected. Furthermore, a combining recess 8 is formed on the lower surface of the retaining wall block 3 so as to be coupled to the combining projection 7, and through-holes 10 are formed on the combining projection 7 and recess 8. In addition, a drain pipe 11 is laid so as to penetrate the through-holes 10 of the combining projection 7 and recess 8 kept in such a state as coupled to each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting structure of retaining wall blocks which are installed over the inclined surface to be spread over the inclined surface to prevent the collapse of the inclined surface such as a road, a river, a shore, along a railroad track. Further, the present invention relates to a method of constructing a retaining wall using the retaining wall block having the connection structure.

[0002]

2. Description of the Related Art It is known to install a retaining wall block on a slope such as a road, a river, a shore, along a railroad track, or the like in order to prevent the slope from collapsing.
Conventionally known retaining wall blocks have been devised in various ways in order to improve the workability.

For example, in a conventionally known installation operation, individual retaining wall blocks are suspended by a crane, transported to a predetermined position, and sequentially stacked. In order to speed up the installation work, it is important that each retaining wall block has a self-supporting structure. It is also necessary that the retaining wall blocks stacked one on top of the other are connected to each other so that they do not easily slip off or come off.

[0004] In the conventionally known retaining wall blocks, the upper and lower retaining wall blocks are joined by fitting the irregularities formed on the upper surface of each retaining wall block with the irregularities formed on the lower surface of the retaining wall block. I was 6, the upper surface 31A and the lower surface 31B of the retaining wall block 31 are horizontal (H), and the projections 32 formed on the upper surface 31A are recesses 33 formed on the lower surface 31B.
The upper and lower retaining wall blocks 31 are connected to each other by a concave / convex connection that fits into the upper and lower walls.

[0005] According to the connection structure of the conventionally known retaining wall blocks 31, since the upper and lower surfaces of the individual retaining wall blocks 31 are horizontal, the retaining wall blocks 31 are installed at the time of installation work.
Can become independent. For this reason, it is stably mounted up and down, and the workability is good and the work safety is obtained. The installation work is performed by sequentially stacking the retaining wall blocks 31 while suspending them by a crane. However, the above-described conventionally known retaining wall blocks 31 make such machine installation work simple.

On the other hand, as shown in FIG.
Although the upper and lower surfaces of the first retaining wall block 1 are not horizontal, the known retaining wall block 41 uses the retaining wall block 4.
A rear support 42 is provided on the rear surface of the vehicle 1 to ensure self-standing stability.

As shown in FIG. 7, in the construction of a conventional retaining wall block, a backfill concrete 43 is cast on the back of the retaining wall block 41, and a backfill made of crushed stone or the like is further provided on the back. Material 44 is installed.

[0008]

However, the previously known retaining wall block 31 has the following problems.
That is, in the conventionally known retaining wall block 31, the shape of the unevenness is trapezoidal. According to the coupling structure using such trapezoidal irregularities, there is a risk that the structure may be easily displaced by applying a little force from front, rear, left and right, or may be dislodged in the vertical direction. For this reason, it cannot be said that the workability and the safety of work are sufficient.

Further, in the above-mentioned conventional retaining wall block 31, since the upper surface and the lower surface must be the horizontal plane H, the inclination angle θ is determined. For this reason, it is impossible to adopt different inclination angles for the same retaining wall block 31, and it is necessary to prepare various types of retaining wall blocks 31 depending on the inclination angle at the construction site. Further, in the structure in which the back support 42 is provided, an operation for installing the back support 42 is required, and thus the operation cost is increased.

Further, since the backfill concrete 43 must be cast on the back surface in order to maintain the strength of the retaining wall, the construction time becomes long and the construction cost cannot be avoided. .

Accordingly, an object of the present invention is to improve the shortcomings of the connecting structure of the above-mentioned known retaining wall block and to assure a secure connecting state, thereby eliminating slippage and slipping out, thereby improving the speed of operation. Another object of the present invention is to provide a connecting structure of a retaining wall block, which improves the self-standing stability and further improves the operational safety. Another object of the present invention is to provide a method for constructing a retaining wall, in which the construction time is shortened and the construction cost is reduced.

[0012]

The feature of the present invention lies in the following constitution. That is, in a retaining wall block which is laid up and down and right and left over a slope such as a road, a river, a coast, or along a railroad track, the lower surface 3B and the upper surface 3A in which the retaining wall block is inclined by an angle α with respect to a horizontal plane H are formed. Have
A coupling projection 4 is formed on the upper surface 3A of the retaining wall block 3 so as to extend and protrude in the vertical direction, and a coupling recess 5 into which the coupling projection 4 is fitted is formed on the lower surface 3B of the retaining wall block 3. A connecting structure of a retaining wall block characterized by being made.

Another feature of the present invention resides in that a plurality of coupling projections 4 and coupling depressions 5 are respectively formed, and the coupling projections 4 and coupling depressions 5 are fitted. In this state, there is provided a fixing member which penetrates the connecting projection 4 and the connecting concave portion 5 to prevent it from falling off, and furthermore, the fixing member is a drain pipe.

Another feature of the present invention is that the coupling projection 4 and the coupling recess 5 have a vertical portion extending in the vertical direction and a horizontal portion extending in the horizontal direction from the tip of the vertical portion. It is in.

Another feature of the present invention is that, after the retaining wall block is composed of a front wall, a rear wall, and a connecting wall, and the retaining wall block provided with an opening in the connecting wall is laid back and forth and right and left, An object of the present invention is to cast back concrete between the front wall and the rear wall, thereby omitting back concrete behind the retaining wall or reducing the thickness of the back concrete.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a view showing a connecting structure of a retaining wall block according to an embodiment of the present invention, FIG. 2 is a view showing a base block, and FIG. 3 is a sectional view of the retaining wall block of FIG. FIG. 4 is a sectional view showing a state where the retaining wall block of FIG. 1 is assembled on a slope.

Referring to FIG. 1 to FIG. 4, a base block 1 is provided below the front surface of the inclined surface S, and the upper surface of the base block 1 is inclined at an angle α with respect to a horizontal plane H. . The base block 1 includes a front part 1A, a rear part 1B,
It comprises a connecting portion 1C connecting the front portion 1A and the rear portion 1B, and a connecting projection 1D extending in the vertical direction is formed on the upper surface of the connecting portion.

The retaining wall block 3 includes a front wall 4 and a rear wall 5, and a connecting wall 6 connecting the front wall 4 and the rear wall 5.
It consists of The connection wall 6 has an opening 6A. Lower surface 3B and upper surface 3 of connecting wall 6 of support block 3
A is inclined by an angle α with respect to the horizontal plane H. A coupling protrusion 7 is formed on the upper surface of the connecting wall 6 of the retaining wall block 3. The coupling projection 7 extends vertically and projects. A coupling recess 8 is formed on the lower surface of the connecting wall 6 of the retaining wall block 3. The coupling recess 8 is provided in the base block 1.
The connecting protrusion 1D formed to extend in the vertical direction on the upper surface or the connecting protrusion 7 of the lower retaining wall block 3 of the retaining wall blocks 3 stacked vertically is fitted in the vertical direction. It is in the form of being depressed.

The connecting projection 7 and the connecting recess 8 of the retaining wall block 3
Are provided with through holes 9 and 10, and when the coupling protrusion 7 and the coupling concave portion 8 are fitted to each other, the through holes 9 and 1 are provided.
0, a drain pipe 11 is provided. The drain pipe 6 may have a structure of another fixing member such as a rod member or a plate member as long as it functions as a fixing member for retaining the upper and lower retaining wall blocks 3.

In the illustrated embodiment, two connecting walls 6 (coupling projections 7 and coupling recesses 8) are formed for one retaining wall block 3, but the present invention is not limited to the illustrated embodiment. However, the number of connecting walls 6 (joining projections 7 and joining recesses 8) provided is one or more. Further, the connecting projection 1D formed on the upper surface of the basic block 1 can be omitted. In this case, it is not necessary to form the coupling recess 8 in the lowermost retaining wall block 3 of the retaining wall blocks 3 stacked in the vertical direction, but the retaining wall block 3 provided with the coupling recess 8 for convenience. Can also be used.

Referring particularly to FIG. 4, the retaining wall block 3
And in the installation state of the foundation block 1, between the front wall 4 and the rear wall 5, the stuffing concrete 12 is cast. The stuffing concrete 12 enhances the strength of the retaining wall in the installed state, whereby the backfill concrete 13 described later can be omitted or the thickness of the backfill concrete 13 can be reduced. Shortening and reduction of construction cost can be obtained. Backfill concrete 13 is cast on the back of the retaining wall block 3 in the installed state. This backfill concrete 1
3 can be reduced in thickness as described above, or can be omitted. On the back of the backfill concrete 13, a backfill material 14 made of crushed stone or the like is provided.

The retaining wall block 3 shown in FIGS.
It will be constructed and installed as follows. First, the foundation block 1 is installed by dug the front surface of the inclined surface S. In this example,
Although the base block 1 is a precast product, the base block 1 can be cast in place. Then, the lowermost retaining wall block 3 is moved to the upper surface of the base block 1 by a crane (not shown), and the coupling projection 1D is fitted into the coupling recess 8. Thereafter, the soil is backfilled and the lower side of the retaining wall block 3 is buried underground. As a result, the lowermost retaining wall block 3 becomes independent.

Next, the backfill concrete 13 and the backfill material 14 are filled with the backfill concrete 12 to a level slightly lower than the height of the lowermost retaining wall block 3. Then, the stuffing concrete 12 is cast to the same height as the backing concrete 13 and the backing material 14.

Next, while the upper retaining wall block 3 is suspended by a crane, the connecting projection 7 of the lower retaining wall block 3 is suspended.
And the coupling projection 7 is fitted into the coupling recess 8 of the upper retaining wall block 3. And the drainage pipe 11
Through the connecting projection 4 and the connecting recess 5 to fix the upper and lower retaining wall blocks 3 together.

Then, as described above, the backfill concrete 13, the backfill material 14, and the body concrete 12 are sequentially installed. This operation is repeated to construct the retaining wall shown in FIG.

The structure described above is an embodiment of the present invention, and the present invention is not limited to the above embodiment. That is, as shown in FIG. 5, a vertical portion 21A extending vertically in the connecting projection 21 formed in the retaining wall block 3 and a horizontal portion 21B extending horizontally from the tip of the vertical portion 21A.
It is good. In this case, the structure of the coupling concave portion 22 also has a vertical portion and a horizontal portion so that the vertical portion 21A and the horizontal portion 21B of the coupling protrusion 21 are fitted. The other structure is the same as that of the embodiment shown in FIGS.
The description is omitted. In the embodiment shown in FIG. 5, there is no need to install a drainage pipe as a fixing member. This embodiment does not exclude the installation of a drainage pipe as a fixing member.

In the above embodiments, the connecting projection is formed integrally with the retaining wall block. However, the gist of the present invention is that the connecting projection is formed separately from the retaining wall block. It is clear that there may be. In this case, the coupling recess may have a structure in which the coupling protrusion is fitted.

[0028]

According to the present invention described above, the following effects can be obtained. According to the present invention, in the installation process,
Since the self-standing stability of the retaining wall block is improved, the construction can be speeded up, and the size of each retaining wall block can be increased, so that the construction can be speeded up accordingly. For this reason, the shortening of the construction period is added and the construction cost is reduced. In addition, since the self-standing stability is improved, the safety during construction is also improved. Furthermore, it is not necessary to provide a support for assisting independence, and it is also possible to omit the backing material, so that the cost can be reduced in this aspect as well. Further, since the concrete filling is installed so as to surround the retaining wall block through the opening of the connecting wall, the individual concrete retaining wall blocks can be integrated by the concrete filling, the strength of the retaining wall is improved, and It is possible to omit the concrete or reduce the thickness of the concrete.

[Brief description of the drawings]

FIG. 1 is a diagram of a retaining wall block showing one embodiment of the present invention, (A) is a plan view, (B) is a front view, and (C).
Is a side view.

FIG. 2 is a view showing one embodiment of a basic block used in the present invention, wherein (A) is a plan view, (B) is a front view, and (C) is a side view.

FIG. 3 is a sectional view of the retaining wall block of FIG. 1;
(A) is an AA sectional view, and (B) is a BB sectional view.

FIG. 4 is a schematic sectional view showing a retaining wall constructed by the retaining wall block of the present invention. It is sectional drawing of the retaining wall block which becomes another Example.

FIG. 5 is a sectional view of a retaining wall block according to another embodiment of the present invention.

FIG. 6 is a cross-sectional view of a known retaining wall block.

FIG. 7 is a cross-sectional view of another known retaining wall block.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Foundation block 3 Retaining wall block 3B Lower surface 3A Upper surface 4 Front wall 5 Rear wall 6 Connecting wall 7 Connecting projection 8 Connecting recess 11 Drainage pipe 12 Casting concrete 13 Backfilling concrete 14 Backfilling material S Slope

Claims (19)

[Claims] 1. A slope S such as a road, a river, a shore, or along a railroad track.
A retaining wall block 3 laid up, down, left and right covering the upper surface of the retaining wall block 3 having a lower surface 3B and an upper surface 3A inclined by an angle α with respect to a horizontal plane H.
A is formed with a connecting protrusion 7 that extends and protrudes in the vertical direction, and the lower surface 3B of the retaining wall block 3 has the connecting protrusion 7.
A retaining wall block having a coupling structure, characterized in that a coupling concave portion 8 into which is fitted is formed. 2. A retaining wall block having a coupling structure according to claim 1, wherein a plurality of coupling projections 7 and coupling recesses 8 are formed. 3. The coupling projection 7 and the coupling recess 8 are provided with through holes 9 and 10, respectively, and the coupling projection 7 and the coupling recess 8 are fitted together. The retaining wall block having a coupling structure according to claim 1 or 2, wherein a fixing member penetrating through the through holes (9, 10) is provided. 4. A retaining wall block having a coupling structure according to claim 3, wherein the fixing member is a drain pipe. 5. The coupling projection 21 and the coupling concave portion 22 have a vertical portion 21A extending in a vertical direction and a horizontal portion 21B extending in a horizontal direction from a tip of the vertical portion 21A. A retaining wall block having the coupling structure according to claim 2. 6. A retaining wall having a coupling structure according to claim 1, wherein the coupling projections are formed of a member separate from the retaining wall block. block. 7. An inclined surface S such as a road, a river, a shore, or along a railroad track.
In the retaining wall block 3 laid up and down and left and right covering the base, a connecting projection 1D is formed on the upper surface of the base block 1 buried at the lower end of the inclined surface S so as to extend vertically and protrude. 3 has a lower surface 3B and an upper surface 3A inclined by an angle α with respect to a horizontal plane H, and the upper surface 3 of the retaining wall block 3
A is formed with a connecting protrusion 7 extending and protruding in the vertical direction, and a lower surface 3B of the retaining wall block 3 is formed with a connecting recess 8 into which the connecting protrusion 1D of the base block 1 is fitted. A connecting structure for retaining wall blocks. 8. The retaining wall block 3 comprises a front wall 4 and a rear wall 5.
A retaining wall block having a coupling structure according to any one of claims 1 to 7, comprising a connecting wall (6) and a connecting wall (6) for connecting them. 9. A retaining wall block having a connection structure according to claim 8, wherein an opening 6A is provided in the connecting wall 6. 10. A retaining wall block having a coupling structure according to claim 8, wherein the coupling projection and the coupling recess are formed on the upper surface and the lower surface of the connecting wall. 11. A method for constructing a retaining wall block 3 which is installed to cover an inclined surface S such as a road, a river, a shore, along a railroad track, etc., and is laid vertically and horizontally. The upper surface of the retaining wall block 3 has a lower surface 3B and an upper surface 3A that are only inclined, a front wall 4, a rear wall 5, and a connecting wall 6. On the lower surface of the retaining wall block 3, there is formed a coupling recess 8 into which the coupling projection 7 is fitted. During the construction, a concrete is poured between the front wall 4 and the rear wall 5. A method of constructing a retaining wall block characterized by being integrated. 12. The method according to claim 11, wherein the connecting wall has an opening. 13. The coupling projection 7 and the coupling recess 8 are provided with through holes 9 and 10, respectively, and the coupling projection 7 and the coupling recess 8 are fitted together. 13. The method according to claim 11, wherein a fixing member penetrating through holes (9, 10) is provided. 14. The method according to claim 13, wherein the fixing member is a drain pipe. 15. The coupling projection 21 and the coupling concave portion 22 have a vertical portion 21A extending vertically and a horizontal portion 21B extending horizontally from the tip of the vertical portion 21A. The construction method of the retaining wall block according to claim 14. 16. The retaining wall block construction method according to claim 11, wherein the connecting projection 7 is made of a member separate from the retaining wall block 3. 17. A connecting projection 1D is formed on the upper surface of the base block 1 buried at the lower end of the inclined surface S so as to extend and project in the vertical direction, and the retaining wall block 3 is inclined by an angle α with respect to the horizontal plane H. A connecting projection 7 having a lower surface 3B and an upper surface 3A is formed on the upper surface of the retaining wall block 3 so as to extend and project in the vertical direction. The method according to any one of claims 11 to 16, wherein a coupling recess (8) into which 1D is fitted is formed. 18. A backfill concrete and a backfill material are provided on the back surface of the retaining wall block, and the thickness of the backfill concrete is made smaller than a predetermined width.
The construction method of the retaining wall block according to any one of claims 1 to 17. 19. The retaining wall block according to claim 11, wherein a backfill material is provided on the back surface of the retaining wall block, and the backfill concrete is omitted. Construction method.