JPS60253611A - Construction work for cut-off wall - Google Patents

Abstract

PURPOSE:To simply construct a cut-off wall by vertically and horizontally stacking up sandbags formed by packing a hydraulic powdery granules into a bag made of porous material. CONSTITUTION:A hydraulic powdery granule 2 (e.g., of Portland cement, etc.) is packed into a bag 1 of a porous material (e.g., jute fiber cloth, canvas, etc.) of meshes to form a sandbag 3. A large number of the sandbags 3 are horizontally and vertically stacked up in a multistage and in a multi-row on the broken places of a dam, etc. Then, the hydraulic powdery granules 2 go out and diffuse from the sandbags 3 and harden hydraulically among the sandbags 1 to form a sealed wall or cut-off wall.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is mainly applicable not only to temporary water stoppages at overflowing or levee-ruptured areas in the event of a river overflowing or a levee breaking. , relates to a construction method for a water-stop wall that is temporarily constructed for the purpose of repair and prevention of repeated flooding and collapse.

<Conventional technology> The conventional method of constructing water-stop walls for the purposes mentioned above is to pile up sandbags filled with soil for temporary or temporary construction. A permanent water cutoff wall was built, and a permanent concrete water wall was constructed by pouring new concrete in the place where the piled soil was removed during subsequent repairs! be.

<Problems to be solved by the invention> However, in the case of using the above-mentioned conventional construction method, when constructing the permanent ice wall, it is not only necessary to remove temporarily used sandbags, but also to remove the sandbags that are occupied by the soil group. It is necessary to pour concrete equivalent to a volume greater than the volume, and the assembly of the formwork is required.
The entire construction work, including pouring concrete, was a major undertaking, increasing construction costs and resulting in poor construction efficiency.

In view of these circumstances, the purpose of the present invention is to propose a construction method that can construct a permanent ice wall very efficiently and economically, although the time and effort required for emergency water stoppage is no different from conventional methods. has.

Means for Solving the Problems> In order to achieve the above object, the water-stop wall construction method according to the present invention comprises filling a hydraulic powder granule material into a bag made of a porous material with a small mesh. The point is that a large number of soil/track bodies are stacked horizontally and vertically, and the water stop wall is grooved by permeation of the powder and granular material from the bag of each soil/snow body to the outside and hardening by hydration. It has the following characteristics.

According to the construction method of the present invention having the above-mentioned characteristics, when a cold river or a levee burst occurs, the above-mentioned earthen bodies are piled up randomly at the location to prevent emergency flooding. At the same time, some part of the powder and granule material from the piled sandbags gradually penetrates into the outside and spreads, and the dispersed powder and granule material mixes with water. While a sealing wall made of hydrate is formed between each adjacent bag, most of the powder and granule material in each bag also hardens due to hydration as water enters the bag, resulting in some variation in composition. However, a hydration-hardened wall that is substantially continuous and integrated over the entire soil I-shaped volume weight range is constructed.Example: Examples of the construction method of the present invention will be described in detail below with reference to the drawings.

In Figure 1, (1) is a bag made of a perforated material with a small mesh such as hemp fiber or canvas! The bag (1) is filled with a hydraulic granular material (2) such as Portland cement, mixed cement, ready-mixed concrete, etc. and sealed to make a sandbag-like body.

An arbitrary number of sandbag-like bodies Cs) can be stacked horizontally and vertically in multiple rows and stages, as shown in Figure 2 and Figure 8, for example, at the site of a broken embankment to temporarily stop water. Do the following.

If left in this state, some of the powder and granule material (!) from the bags (!) of each sandbag-like body (8) will permeate and diffuse to the outside, and the adjacent bags (1), (13 In the process, the diffused powder granules are mixed with water and hardened by hydration to form a sealing wall of hydrate between the bags (1) and the six bags (1).
) is also hydrated and hardened, resulting in a clay body (
A substantially continuous and integrated hydration hardened soil ice wall (4) is formed over the entire stacking range of 3).

When repairing a collapsed area due to water subsidence, a concrete wall (i.e.
) by pouring and forming both walls (4) and (6)
The integrated i! Permanent water stop wall (5) as shown in Figure 4
It is to complete the.

<Effects of the Invention> As is clear from the detailed explanation above, when the method of the present invention is used, (1) similar to the conventional emergency water stoppage method using sandbags, it is possible to simply layer soil in a random manner; Although the desired temporary ice wall can be easily and efficiently produced (!), it is possible to obtain a water-hardened wall that is almost continuous and integrated over the entire stacking area, and has a water-stopping effect. (8) At the time of restoration, the above-mentioned hydration-hardened wall was permanently installed.
On the boat! Because of the construction, the volume required for concrete pouring is small, and there is no need to remove temporary walls, which makes it possible to significantly reduce repair costs and improve efficiency.

This resulted in remarkable effects.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway perspective view of the sandbag-like body, Figures 2 and 8 are side views and plan views showing the procedure for making an emergency ice wall, and Figure 4
ei! 3 is a sectional view of the main water stop wall. (The 1st item is a bag, the a item is a hydraulic granular material, (n is a sandbag-like body, (
4) is a water stop wall.

Claims (1)

[Scope of Claims] ■ A plurality of earthen bodies (8) made of hydraulic powder and granular material (old material) are placed in a bag (1) made of a small perforated material in the horizontal and vertical directions. A water-stopping method characterized in that a water-stopping wall (number) is constructed by permeating the powder material (2) from the bag 0) of each soil letter (1) to the outside and hardening it by hydration. Wall construction method. (2) The water-stop wall construction method according to claim 0, wherein the powder and granular material (older than wood) is used.