JPH083181B2 - Method of forming retaining wall and basic block for retaining wall - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method of forming a retaining wall for protecting, for example, a cliff along a road, and a retaining wall basic block used in this method.

“Prior art” For example, retaining walls are formed for retaining soil on cliffs along roads. These retaining walls are formed by digging a groove in a portion adjacent to the slope of the flat ground to provide a foundation, and sequentially stacking blocks on the foundation to cover the slope.

FIG. 7 shows a conventional retaining wall forming method.
This method will be described below according to steps.

Various dimensions such as the width and length of the groove for making the foundation, and the angle and height of the slope are measured (so-called sending out method).

As shown in FIG. 7A, a groove 13 is dug along a portion of the flat land 11 adjacent to the slope 12.

As shown in FIG. 3B, crushed stones 14 are laid inside the grooves 13 and pressed by pressing means 15 such as a roller compactor.

As shown in FIG. 3C, a mold 16 made of wood or metal is installed inside the groove 13, and concrete 17 is placed inside the mold 16.

As shown in (d) of the same figure, the green concrete 17 is cured for about 2 to 3 days until it solidifies.

After the ready-mixed concrete 17 is solidified, the mold 16 is extracted from the groove 13 as shown in FIG.

As shown in FIG. 6F, the gap formed by extracting the mold 16 is filled with the excavated soil 18 or the backfill material 21 and backfilled.

As shown in (g) of the same figure, the pile block root stone 20 is installed on the foundation concrete 17 '. At that time, the backing material 21 such as crushed stone is inserted on the slope 12 side.

As shown in FIG. 3H, ready-mixed concrete 22 is placed in the gap between the pile block root stone 20 and the backing material 21.

As shown in (i) of the same figure, a stacking block 23 is stacked on the stacking block root stone 20. At this time, the backing material 21 is inserted on the slope 12 side in the same manner as above.

As shown in FIG. 11 (j), the loading block 23 and the backing material 21
Placing fresh concrete 22 in the gap between and.

After that, by repeating the above steps, the stacking blocks 23 are sequentially stacked above the slope 12, and the blocks 23 are covered to the predetermined height of the slope 12 to form a retaining wall.

FIG. 8 and FIG. 9 show examples of how to stack the stone blocks 20 and the stone blocks 23. In addition, the piled block root stone will be simply referred to as root stone hereinafter.

The example shown in FIG. 8 is the so-called stacking method, in which both the root stone 20 and the stacking block 23 are rectangular when viewed from the front, and the root stone 20 or the stacking block 23 extends upward so as to extend over the seam A loading block 23 is installed.

The example shown in FIG. 9 is a so-called valley stacking method, in which the root stone 20 basically has a shape like a home base and the stacking block 23 basically has a rectangular shape. However, the edge of the retaining wall has a shape suitable for each location such as a triangle. Then, each piling block 23 has a root stone 20 or a piling block 23 below.
The V-shaped groove formed in the seam is diagonally arranged so that one corner fits.

"Problems to be solved by the invention" In the conventional method of forming a retaining wall, a mold 16 made of wood or metal is installed in the groove 13, and ready-mixed concrete 17 is placed in the mold 16. After the ready-mixed concrete 17 is solidified, the formwork 16 is extracted, and the excavated soil 18 is backfilled in the gap. Therefore, the transportation, assembly, and
It is necessary to clean and clear the frame material.

In addition, root stones 20 are formed on the formed concrete foundation 17 '.
After setting up and hardening with ready-mixed concrete 22, the loading block
Since 23 are piled up, root stone 20 installation work is also required.

As described above, in the conventional retaining wall forming method, various complicated works are required until the step of stacking the stacking blocks 23, and the work time and labor required therefor are great. In the civil engineering industry, there is a demand for mechanization and simplification of work due to lack of manpower, aging, etc., and development of a technique for forming a retaining wall by a more simplified process has been desired.

Therefore, an object of the present invention is to provide a retaining wall forming method and a retaining wall foundation block that can simplify the steps from forming a foundation to installing root stones.

"Means for Solving the Problem" In order to achieve the above object, the method for forming a retaining wall according to the present invention is such that a groove for burying a foundation is dug in a portion adjacent to a slope of a flat ground, and a void is formed so as to penetrate vertically. A foundation block for a retaining wall that integrally has a frame-shaped foundation portion and a root stone portion that is erected obliquely in accordance with the angle of the slope from which the retaining wall is to be formed from the upper portion of the foundation portion. Installing in the groove, placing a stacking block on the upper part of the root stone part of the retaining wall foundation block to line the concrete, and placing the stacking block on the stacking block again to line the concrete And a step of stacking the stacking blocks up to a predetermined height by repeating this last step.

Further, the retaining wall foundation block according to the present invention, a foundation portion formed in a frame shape so as to have a void that penetrates vertically,
It is characterized in that it integrally has a root stone portion that is erected in an oblique direction in accordance with the angle of the slope to form the retaining wall from the upper portion of the base portion.

[Operation] In the present invention, after forming a groove adjacent to the slope, a retaining wall basic block is installed in this groove, and excavated soil or backfill material is placed in the gap between the grooves, and if necessary, the retaining wall. The process of forming the foundation and installing the root stones is completed simply by placing concrete in the voids of the foundation block. That is, it is not necessary to carry, assemble, clean and tidy up the frame, which has been required in the conventional work, and the process of installing the root stone on the foundation and lining the concrete is also simplified. Therefore, it is possible to greatly improve the workability in forming the retaining wall, shorten the work time, and save labor. Further, by placing concrete in the voids of the retaining wall foundation block, the continuity of the foundation can be maintained.

Further, since the basic block for a retaining wall according to the present invention is formed by integrating the foundation concrete of the retaining wall and the root stone, the retaining wall can be formed with good workability by applying the above method.

Furthermore, the foundation block for the retaining wall is formed in a frame shape so as to have a void that penetrates vertically, and the upper portion of this foundation portion is set up diagonally in accordance with the angle of the slope on which the retaining wall is to be formed. Since it is composed of root stones installed, the weight of the entire block is reduced by the above voids and the work such as transportation and installation is facilitated, and the continuity of the foundation is maintained by filling the above voids with concrete. You can

"Embodiment" FIGS. 2 to 5 show an embodiment of a retaining wall basic block according to the present invention. 2 is a plan view, FIG. 3 is a front view, FIG. 4 is a side view, and FIG. 5 is a sectional view taken along the line AA in FIG.

In this retaining wall base block 31, a pair of flat plate-shaped faces 32 and 33 are arranged facing each other substantially in parallel with each other at a predetermined interval, like a normal block.
Wave shells 34 are partially connected in between. The front and rear faces 32, 33 and the wave shell 34 constitute a frame-shaped base portion 36 having a gap 35 penetrating vertically. In addition, in this embodiment, the wave shell 34 is connected at three points of the faces 32 and 33, but the wave shell 34 may be connected at two points or four or more points of the faces 32 and 33. However, in order to reduce the weight of the entire block and facilitate filling the concrete in the frame, the frame-like structure is formed so as to form a void 35 that penetrates vertically.

On the upper part of the base part 36, a root stone part 37 is erected so as to project obliquely rearward from the upper edge part of the front face 32.
The inclination angle of the root stone part 37 is set according to the angle of the slope on which the retaining wall is to be formed. The root stone part 37 has a shape in which plate-like bodies which are formed by turning the home base upside down are connected in the lateral direction. However, a tapered groove 38 is provided at the connecting portion of each plate-like body, and the appearance is such that individual plates are joined. Also, in the front corner of the outer circumference,
A tapered chamfer 39 is provided. The above-mentioned wave shell 34 is connected to each of the faces 32 and 33 so as to spread like a skirt when viewed from above, and also spreads like a skirt on the back side of the root stone part 37 when viewed from the side. Are linked to.

In addition, in this embodiment, since it is a block for troughs as shown in FIG. 9, the root stone part 37 has a shape in which plate-like bodies are connected such that the home base is turned upside down. In the case of a block for stacking, a rectangular plate-shaped body may be connected to each other (that is, an elongated plate-shaped body).

At the end of the retaining wall, the root stone part 37 at the end is
It is necessary to make the shape of the trapezoidal shape suitable for the place.

Further, in this embodiment, six plate-like bodies having inverted home bases are laterally arranged in the root stone part 37,
The number of the plate-shaped bodies arranged may be appropriately set according to the desired block length.

FIG. 1 shows a retaining wall forming method of the present invention using the retaining wall basic block 31. This method will be described below according to steps.

Various dimensions such as the width and length of the groove for making the foundation, and the angle and height of the slope are measured (so-called sending out method).

As shown in FIG. 1 (a), a groove 13 is dug along a portion of the flat land 11 adjacent to the slope 12.

As shown in FIG. 3B, crushed stones 14 are laid inside the grooves 13 and pressed by pressing means 15 such as a roller compactor.

 The steps up to this point are the same as the conventional method.

As shown in FIG. 3C, the retaining wall basic block 31 is installed inside the groove 13 in accordance with the way of using.

As shown in FIG. 3D, the retaining wall basic block 31 and the groove
The excavated soil 18 and the backfill material 21 are put in between 13 and backfilled to fix the retaining wall basic block 31. Furthermore, the green concrete 41 is poured into the voids 35 (see FIG. 2) of the retaining wall base block 31 and cured for about 2 to 3 days to be solidified. Adjacent retaining wall foundation blocks 31 are connected by the ready-mixed concrete 41, and the continuity of the foundation is maintained.

As shown in FIG. 6E, the loading block 23 is assembled on the root stone part 37. At this time, the backing material 21 made of crushed stone or the like is inserted on the slope 12 side.

As shown in (f) of the figure, ready-mixed concrete 22 is placed in the gap between the stacking block 23 and the slope 12.

After that, by repeating the above steps, the stacking blocks 23 are sequentially stacked above the slope 12, and the stacking blocks 23 are covered to the predetermined height of the slope 12 to form a retaining wall.

FIG. 6 shows another embodiment of the retaining wall basic block according to the present invention. Since the overall configuration is the same as that of the above-described embodiment, the same parts are designated by the same reference numerals and the description thereof will be omitted.

The retaining wall base block 31 is suitable when the U-shaped groove 51 for drainage is formed adjacent to the foundation. That is, the U-shaped groove 51 is configured by connecting a block 52 having an L-shaped cross section to the front surface of the retaining wall basic block 31, and the face 32 on the front surface side of the retaining wall basic block 31 has the U-shaped groove 51. It is one side wall. A lid plate 53 is installed on the upper surface of the U-shaped groove 51, and one of the sides of the lid plate 53 is engaged with the retaining wall basic block 31 so that the retaining wall basic block 31 is formed.
The front corner of the front of the car has a stepped part that is cut out in an L-shaped cross section
40 are provided.

[Effects of the Invention] As described above, according to the present invention, since the retaining wall forming foundation block in which the foundation concrete of the retaining wall and the root stone are integrated is used, a frame body for forming the foundation in the conventional method is used. It eliminates the need for transportation, assembly, frame cleaning and tidying up, and simplifies the process of placing root stones on a foundation and lining concrete. Therefore, it is possible to greatly improve the workability in forming the retaining wall, shorten the work time, and save labor.

[Brief description of drawings]

1 (a), (b), (c), (d), (e),
(F) is an explanatory view showing an embodiment of a retaining wall forming method according to the present invention in accordance with steps, FIG. 2 is a plan view showing an embodiment of a retaining wall forming base block according to the present invention, and FIG. 3 is a front view of the block. Fig. 4 and Fig. 4 are right side views of the block, and Fig. 5 is a third view.
6 is a sectional view taken along the line AA in FIG. 6, FIG. 6 is a sectional view showing another embodiment of the retaining wall forming base block according to the present invention, and FIGS. 7 (a), (b), (c), (D), (e),
(F), (g), (h), (i), and (j) are explanatory views showing an example of a conventional retaining wall forming method according to the steps, and FIG. 8 is an example of how to stack the stacking blocks on the retaining wall. FIG. 9 is a front view showing another example of how to stack the stacking blocks on the retaining wall. In the figure, 11 is a flat ground, 12 is a slope, 13 is a groove, 23 is a pile block, 22 is ready-mixed concrete, 31 is a retaining wall foundation block, 3
2, 33 is face, 34 is wave shell, 35 is void, 36
Is a foundation part, 37 is a root stone part, and 41 is ready-mixed concrete.

Claims (2)

[Claims] 1. A foundation portion formed in a frame shape so as to have a vertically penetrating groove by digging a groove for burying a foundation in a portion adjacent to a slope of a flat land, and a retaining wall formed from an upper portion of the foundation portion. A step of installing a retaining wall foundation block integrally having a root stone portion that is erected obliquely in accordance with the angle of the slope to be attempted in the groove, and above the root stone portion of the retaining wall foundation block. Steps of placing a loading block and lining the concrete, placing the loading block again on the loading block and lining the concrete, and repeating this last step to piling the loading block to a predetermined height A method for forming a retaining wall, which is characterized in that 2. A base portion formed in a frame shape so as to have a vertically penetrating space, and is erected obliquely in accordance with the angle of the slope from which the retaining wall is to be formed from the upper portion of the base portion. A base block for a retaining wall, which has a root stone part integrally.