JPH08253944A - Construction method for large scale retaining wall - Google Patents

Abstract

PURPOSE: To firmly connect a bottom slab and a vertical wall together and increase the workability and reduce the construction period, by simultaneously placing concrete into the hollow part of large scale precast stacking-block counterforts and the foundation bottom slab. CONSTITUTION: Receive frames of large scale precast stacking-blocks 7 loaded on stretched reinforcements for assembling reinforcements at the time of construction of a foundation bottom slab concrete 2, are provided in common together with the reinforcements. In this case, base blocks with the front wall and the counterfort protruding to the rear side face, are arranged and large scale precast blocks 7 are stacked to construct a retaining wall. A hollow is formed in the retaining wall 11 and the stacking blocks 7 in which holes for stretching reinforcements on constructing the bottom concrete 2 at the lowermost bed of the blocks are provided, are placed on the base block. Thereafter, required post reinforcements 5 are arranged in the hollow part in the counterfort of the stacking blocks 7 in accordance with the filling height and the soil quality. And then wall concrete 6 and bottom slab concrete 2 are simultaneously placed in the hollow part of retaining wall.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an improvement of a large retaining wall having a retaining wall of approximately 5 m or less, which reduces the cost of a large retaining wall structure, diversifies it at the site of use, and simplifies it at the construction site. The purpose is to deal with the change.

[0002]

2. Description of the Related Art Conventionally, as in large-scale precast retaining wall patent No. 1365237, which exceeds approximately 5 m, the length of the slab has been previously made to be the minimum necessary length to be self-supporting at the time of site installation. A construction method that allows transportation to the construction site and adds the thickness and length of the bottom slab that matches the design conditions after installation at the construction site and the anchor rebar (16) of Japanese Patent Application No. 53-7629 is installed at a predetermined position. After sufficiently fixing the construction of the block, the foundation slab concrete (17) is placed and cured for a certain period until a predetermined strength is obtained, after which the medium and small precast blocks (12) (13) (14) ) (15) to anchor rebar (1
Through 6)

[Fig. 9] There was a method of constructing a retaining wall by stacking them individually as shown in Fig. 9.

[0003]

A large precast retaining wall that exceeds approximately 5 m, for example, in the case of Japanese Patent No. 1365237, a precast retaining wall that is 5 m or more in the past is not possible due to vehicle restrictions (vehicle width and height). We succeeded in solving the existing transportation means and precasting the conventional cast-in-place retaining wall. However, this is because the formwork must be prepared for each type of wall height, and there is a large amount of capital investment in the formwork, so considering the amortization cost of the formwork, the product is inevitably expensive and expensive. . In addition, since the product is too large, there is a drawback that a large heavy machine is required at the construction site and that the installation of the product becomes more difficult. On the other hand, Japanese Patent Application No. 53-76
After arranging the anchor rebars (16) sufficiently fixed in consideration of the work extension of the block at the time of constructing the anchor rebars of No. 29 publication, the foundation slab concrete (17)
And then curing for a certain period of time until a predetermined strength is obtained, after which the medium and small blocks (12) (13) (14) (1
Retaining wall construction method for stacking 5) by passing it through anchor rebar (16)

[Fig. 9] has the drawback that high accuracy is required and it takes time and effort. Furthermore, the foundation slab concrete (17) and the block (12) are the same as the foundation slab concrete because only the anchor rebar (16) is interposed. (17) and block (12)
Since it is not completely integrated, since the maximum earth pressure acts on the lowermost retaining wall block (12) in a large retaining wall structure of about 5 m or more, the foundation floor slab concrete (17) and block (12) There was a big question in terms of strength in the continuous structure.

[0004]

[Means for Solving the Problems] In order to solve the above problems, a front wall and a rear side surface thereof having through-rebar holes (3) on a precast slab (1) or a cast-in-place concrete slab (1). A small base block (4) for the retaining wall that protrudes from the base block (4) is laid through the reinforcing bar hole (3) by accurately adjusting the level adjustment and front wall alignment, etc. ) Is mounted on the upper surface of a large precast product block (7) having a large front wall and a retaining wall projecting from the rear surface of the large precast product block (7). 3) is provided and the reinforcing bar (9) for foundation bottom slab is arranged, and the required amount of vertical post reinforcing bars (5) is inserted into the retaining wall (11) of the large precast block (7) to position it. Post iron in place by material (10) By fixing (5), injecting the glazed concrete (6) and pouring the foundation slab concrete (2) at the same time, the foundation slab concrete (2) and the large precast block (7) are combined and integrated. It is something to solve.

[0005]

[Operation] Reinforcing bar for base slab (9) and large precast block (7) built into the base slab concrete (2)
Due to the combination of the post rebars (5) built in, the foundation slab concrete (2) and the large precast block (7) are strongly combined and integrated.

[0006]

【Example】

[Fig. 5] When constructing a foundation bottom slab concrete (2) on a precast floor slab (1) or on-site floor slab (1) when constructing a large retaining wall such as the large precast block (7) of Reinforcing bars for assembling steel bars (3)
The base block (4) having a front wall and a retaining wall protruding from the rear side of the large precast product block (7), which forms the

[Fig. 1] The retaining wall portion (11) is a hollow portion in order to stack a large precast laminating block (7) having a retaining wall projecting on a front wall and a rear side thereof and arranged as shown in FIG. (8) is formed, and through holes (3) for assembling the reinforcing bars when constructing the foundation slab concrete (2) are formed in the lower part of the front wall and the lower part of the bottom wall of the bottom layer of the large precast block (7). The large precast product block (7) provided is mounted on the base block (4), and then the base bottom plate rebar (9) is installed in the reinforcing hole (3) of the base block (4) and the large precast product block (7) mounted above. Reinforcing each of them, and arranging post rebars (5) in a predetermined position in the retaining wall hollow part (8) of the large precast laminated block (7) in an amount suitable for the site conditions such as embankment height and soil quality behind the front wall. Large large precast product block A large precast block (7) on a vertical wall and an in-situ foundation slab concrete (2) are cast by simultaneously placing a glazed concrete (6) and a foundation slab concrete (2) into the retaining wall hollow part (8). To be completely integrated. The present invention is configured as described above.

[0007]

According to the present invention, the conventional patent No. 1365 is used.
Unlike the No. 237, there is no need to manufacture a formwork for each type of retaining wall height, so there is no need to invest in a large amount of formwork, and no large heavy machinery is needed at the construction site. In addition, after arranging the anchor rebars (16) of one of Japanese Patent Application No. 53-7629, the anchor rebars (16) sufficiently fixed in consideration of the work extension of the block at a predetermined position, the foundation slab concrete (17). And then cure for a certain period of time until the specified strength is obtained, after which the medium and small blocks (1
2) (13) (14) (15) to anchor rebar (16)
Retaining wall construction method of stacking through

Compared with FIG. 9, a precast floor slab (1) or a site-casting floor slab (1) has through-rebar holes (3) for rebar assembly when constructing a foundation slab concrete (2),
Furthermore, a base block (4) having a front wall and a retaining wall protruding from the rear side of the front block is arranged so that the level of the large precast product block (7) can be easily adjusted by human power, and the front wall is arranged. In order to build up a retaining wall by stacking a large precast product block (7) having a retaining wall projecting on its side surface and a rear wall, the retaining wall part (11) is hollow, and the bottom layer of the large precast product block (7) is In the lower part of the front wall and lower part of the retaining wall, foundation slab concrete (2)
A large precast product block (7) provided with through-rebar holes (3) for assembling reinforcing bars when constructing is installed on the base block (4), and then the base block (4) and the above-mentioned large precast product block (7). ) Reinforcing hole (3)
Reinforcing bars for foundation slabs (9) are installed in each of them, and at the predetermined position of the hollow part (8) of the retaining wall of the large precast product block (7), the height of the embankment behind the front wall and the internal friction angle due to the soil quality etc. The size and number of post rebars (5), and the strength of glazed concrete (6) are adjusted according to various sites because the volume that can arrange post rebars (5) according to the conditions of (1) is secured. In addition, since the cast-in concrete (6) and the foundation bottom slab concrete (2) are simultaneously placed in the hollow part (8) of the retaining wall of the large precast product block (7), the large precast product block of the vertical wall (7) and foundation slab concrete (2) are completely integrated, and unlike the conventional construction method, not only the foundation slab and the vertical wall sufficiently satisfy the strength of the continuous construction structure, but also the construction is easy and Unlike the construction method of The construction period can be shortened because the curing period is shortened by placing the foundation slab concrete (2) and the concrete wall (6) in the hollow part (8) of the retaining wall of the large precast block (7) at the same time. Etc., a great effect can be expected.

[Brief description of drawings]

FIG. 1 shows a state in which a base block (4) is arranged on a precast floor slab (1) or on-site floor slab (1).

FIG. 2

FIG. 1 shows a state where large precast product blocks (7) are arranged in FIG.

FIG. 3

FIG. 2 shows a state in which the reinforcing bar (9) for foundation slab and the reinforcing bar (5) for post are arranged.

FIG. 4

[Fig. 3] Fig. 3 shows a state in which the foundation bottom plate concrete (2) and the glazed concrete (6) are placed.

FIG. 5 is a perspective view showing a stacking example of a single retaining wall of the present invention.

FIG. 6 is a perspective view showing a stacking example of two retaining walls of the present invention.

FIG. 7 shows a state in which an anchor rebar (16) of a conventional method is fixed and a foundation slab concrete (17) is placed.

FIG. 8

FIG. 7 shows a state in which the product block (12) is inserted in the anchor reinforcing bar (16).

FIG. 9 is a perspective view showing a stacking example of a conventional construction method.

FIG. 10 shows an example of use of the vertical earth retaining material for cutting of the present invention.

FIG. 11 shows an example of use of the present invention with a slope for cutting

[Explanation of symbols]

 1; Precast floor slab or cast-in-place floor slab 2; Foundation slab concrete or foundation slab 3; Reinforcing hole 4; Base block 5; Post rebar 6; Gambling concrete 7; Large precast block or retaining wall block 8; Hollow part 9 Reinforcing bar for foundation slab 10; Positioning material or post reinforcing bar locating material 11; Retaining wall part 12; Laminate block 13; Laminate block 14; Laminate block 15; Laminate block 16; Anchor rebar 17; Foundation slab concrete of conventional method

Claims (1)

[Claims] 1. When constructing a large retaining wall, a through rebar hole for assembling a reinforcing bar when constructing a foundation slab concrete (2) on a precast floor slab (1) or on-site floor slab (1) ( 3) and also has a receiving frame for the large precast product block (7) to be mounted on the base block (4) that has a front wall and a retaining wall protruding from the rear side that can be easily adjusted in level by human power. Retaining wall large precast which has a front wall and a retaining wall protruding from the rear side of the front wall, and the retaining wall portion (11) is hollow in order to construct a retaining wall by stacking the retaining blocks. Large precast product block (7) with through holes (3) for assembling rebar when building foundation slab concrete (2) in the lower part of the front wall and the lower part of the retaining wall of the lowermost layer of the product block (7). The base After mounting on the lock (4), the base bottom plate reinforcing bars (9) are respectively arranged in the reinforcing bar holes (3) of the base block (4) and the large-sized precast product block (7), and the large precast product block (7). ) Arrangement of post rebars (5) in a predetermined position on the retaining wall hollow part (8) according to the conditions of the working site such as the height of the embankment behind the front wall and soil quality, and the large precast block (7) is retained. A large precast pile block (7) on a vertical wall and an in-situ foundation slab concrete (2) are simultaneously cast into the wall hollow part (8) by casting the glazed concrete (6) and the foundation slab concrete (2). ) Is a complete integration of a large retaining wall construction method.