JPH0483018A - water stop wall - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water-stop wall constructed in the ground for the purpose of water-stopping.

[Background Art] When constructing an underground structure, there are cases where it is necessary to block the movement of groundwater to prevent water from flowing.

As such a water-blocking method, constructing a water-stop wall is often practiced. As methods for constructing water-stop walls, methods such as constructing continuous underground walls have been proposed and implemented.

By the way, the method of constructing a continuous underground wall is to connect elements (single concrete walls) 20 in the vertical direction to form a wall body, as shown in FIG.

[Problems to be Solved by the Invention] However, the prior art has the following problems.

In the method of using continuous underground walls, it is necessary to increase the thickness of the concrete in order to ensure water-tightness and strength at the joints, which makes the wall thickness in areas other than the joints unnecessarily large, making it uneconomical. There was a problem.

The present invention has been made in view of such problems,
The objective is to provide a water-stopping wall that is more economical than the prior art.

[Means for Solving the Problems] The gist of the present invention is a water-stopping wall for the purpose of water-stopping formed by joining wall-like parts, wherein the joining part of the wall-like part is connected to the wall-like part. The water stop wall is characterized by being a columnar part with a cross-sectional dimension larger than the thickness of the water stop wall.

[Function] Since the joint portion of the water-stopping wall of the present invention is a columnar portion whose cross-sectional dimension is larger than the thickness of the wall portion, the water-stopping property is enhanced. and cut it off to the minimum necessary.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the component parts described in this example are not intended to limit the scope of this invention to only those, unless otherwise specified. , is merely an illustrative example.

First, the structure of the water stop wall according to this embodiment will be explained using FIG. 1(a) and FIG. 1(b).

As shown in FIG. 1(a) and FIG. 1(b), the water-stopping wall 1 is composed of a plurality of wall-like parts 3 and a columnar part (where the ends of the plurality of wall-like parts 3 are joined together). It is a continuous underground wall consisting of 2 (interior). The wall portion 3 is made of a self-hardening water stop material that extends to the impermeable layer.

Further, the columnar portion 2 is also made of a self-hardening water-stopping material that has a diameter larger than the thickness of the wall portion 3 and extends to the impermeable layer.

Next, a method of constructing the water stop wall 1 will be explained.

First, an excavation hole having a circular shape in plan view is excavated at both end portions of the wall portion 3 using an earth auger or the like to reach the impermeable layer.

Next, by a method suitable for carrying out the present invention, a thin groove is excavated in the ground G where the water stop wall 1 is to be constructed, reaching the impermeable layer.

Next, or in the step of excavating the thin groove, the inside of the excavation hole and the thin groove are filled with a self-hardening water stop material, and after the material has hardened to the extent that it can stand on its own, it is overlapped with the previous excavation hole and the same process as above is carried out. Drill a borehole.

Next, a thin groove is excavated in the same manner as above.

The water stop wall 1 can be constructed by repeating the above steps.

Note that in the above method, a thin groove is excavated after a borehole is excavated, but this is not intended to limit the scope of the present invention. good.

In addition, as shown in FIG. 1(a), a water-impermeable sheet 5
Alternatively, the water-impermeable plate-like body 5 may be buried in the wall-like part 3 between the columnar parts 2.

Next, the function and effect of the water stop wall 1 will be explained using FIG. 2.

In the water cutoff wall 1, compared to a continuous underground wall, the columnar part 2
(self-hardening water-stopping materials (water-stopping mortar, etc.) existing in the shaded area in FIG. 2) can be greatly reduced.

Therefore, according to this embodiment, compared to the case where a continuous underground wall is simply used as the water stop wall 1 as in the conventional technology, the amount of filling of the self-hardening water stop material can be reduced by a large amount, and the construction period and construction cost can be reduced. can.

Although the cylinder 2 is used as the columnar part in this embodiment, this is not intended to limit the scope of the present invention, and the present invention may use other materials suitable for carrying out the present invention, such as a prismatic part. can be used.

Now, the construction method of the above embodiment will be explained here.

A step of drilling at least two preliminary holes in the ground where a water-stopping wall is to be constructed, a step of excavating a thin groove using a wire saw, and a step of inserting a water-blocking material into the preliminary hole and the thin groove. , and a step of applying the water-blocking material in the thin groove to the entire thin groove by driving a wire saw. The water stop wall 1 can be constructed through the above steps. For more details, see July 2, 1990, which is an invention by the inventors of the present application.
Please refer to the specification of "Method for constructing water-stop walls" filed on the 5th.

Further, as shown in FIG. 3, the water-stopping wall 1 can also be constructed using a water-impermeable sheet 5 or a water-impermeable plate-like body 5 as a wall-like portion. Even in such a case, the water-stopping properties of the joint can be improved as in the present embodiment. For the method of constructing the water stop wall l using a sheet, please refer to the specification of the earlier patent application filed by Ayugan, Japanese Patent Application No. 1-231227.

[Effects of the Invention] Since the present invention is configured as described above, it produces the following effects.

The joint portion of the water-stopping wall according to the present invention is a columnar portion with a large cross-sectional dimension to increase water-stopping properties, and the thickness of the wall portion is made thinner than the columnar portion to minimize the necessary thickness.

As a result, the present invention improves water-stopping performance and economical efficiency compared to the prior art, and also contributes to shortening the construction period.

[Brief explanation of the drawing]

Figures 1 (a) to 2 show one embodiment of the present invention, in which Figure 1 (a) is a plan view of the water stop wall, Figure 1 (b) is an elevational view of the water cutoff wall, and FIG. 2 is a plan view of a water stop wall, FIG. 3 is a plan view of a water stop wall according to another embodiment of the present invention, and FIG. 4 is a perspective view of a conventional example. 1...Water-stop wall, 2...Columnar part, 3...
...Wall-shaped part, 5... Water-impermeable sheet or plate-like body.

Claims (1)

[Claims] A water-stopping wall for the purpose of stopping water formed by joining wall-like parts, characterized in that the joint part of the wall-like parts is a columnar part with a cross-sectional dimension larger than the thickness of the wall-like part. Water-stop wall.