JPH0360974B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a water-blocking wall constructed by connecting water-blocking membranes using a connecting guide.

[Conventional technology]

In general, underground impermeable walls, impermeable walls at the lower part of dams, impermeable walls in underground dams, impermeable walls around nuclear power plants, etc., are used to prevent groundwater outflow or recharge groundwater. There are water walls, muddy mortar walls, muddy solidified walls, column piles cast in place, etc.

[Problem that the invention seeks to solve]

However, each of the above water-shielding walls has the following problems.

First, continuous underground walls are made of reinforced concrete and have high rigidity, making them expensive and inflexible. Similarly, asphalt-filled impermeable walls are expensive because the materials are expensive.

On the other hand, muddy mortar walls and muddy solidified walls have the advantage of being cheap and flexible, but there are concerns about their durability, so steel sheet piles are inserted to ensure water-tightness. method is used. However, when interfering with water to a depth of several tens of meters, such as in an underground dam, it is difficult to horizontally connect steel sheet piles, and even if it could be inserted, it would be quite expensive. In addition, muddy mortar walls and muddy solidified walls have little experience and are still often constructed temporarily.
There are concerns about durability.

Finally, because the cast-in-place column piles are long, it is difficult to ensure accuracy and their reliability is low.

The present invention solves the above-mentioned problems, and aims to provide a water-blocking wall that is inexpensive and has high water-stopping properties.

[Means for solving problems]

To this end, the water-shielding wall of the present invention is a water-shielding wall constructed by connecting water-stop membranes using a connecting guide, and includes:
A water stop film is held between a first connection guide having an opening, and an additional water stop film connected to the water stop film is held using a second connection guide that fits into the first connection guide, and A hollow space is formed in the fitting part of the first connection guide and the second connection guide, and a balloon part made of a water-stop film is provided, and grout is injected into the balloon part to inflate it and seal the water-stop film together. It is characterized by being configured to allow water to flow through it.

[Effect]

In the water-blocking wall of the present invention, each water-blocking membrane is held between the connecting guides and connected to each other, so the connection work is easy. Since it is crimped, the water-stopping performance at the connecting portion of the water-stopping membrane is also improved. Further, by providing the connecting guide or the means for engaging with the connecting guide on the locking pipe or the partition plate, the water-blocking wall can be easily constructed.

〔Example〕

Examples will be described below with reference to the drawings.

Fig. 1 is a diagram showing one embodiment of a water-stop membrane vertical joint used in a water-shielding wall according to the present invention, Fig. 2 is a diagram for explaining a method of installing a locking pipe, and Fig. 3
The figure is a diagram for explaining how to install the partition plate.
The figure is a diagram for explaining a method of holding the connecting fitting.

The water-blocking wall of the present invention is constructed by using connecting guides that hold water-blocking membranes between them, and connecting the water-blocking membranes by means of vertical joints of the waterproof membrane formed by the connecting guides. As the material for the water-stop membrane, a stretchable sheet such as rubber, polyethylene, polypropylene, or fiber impregnated with asphalt is used. As shown in FIG. 1, the water-stopping membrane vertical joint consists of a first connecting guide 3 that sandwiches the water-stopping membrane 1 and has an opening on the side of the water-stopping membrane 2 to be added, and an inner side of the first connecting guide 3. The second connecting guide 4 is inserted into the opening so as to close the opening. A hollow space is formed in the connection part between the first connection guide 3 and the second connection guide 4, and the adjacent water stop film 2 to be added is sandwiched between the second connection guide 4 and the water stop film 1 The balloon portion 7 of the water-stop membrane 2 is provided on the side, that is, in the hollow space. Then, the balloon portion 7 is inflated with a grout material and the water-stop membranes 1 and 2 are connected by pressure.

Next, the procedure for connecting the water-stop membranes will be explained. first,
When connecting the water stop film 1 and the water stop film 2, solidified mud water,
The water stop film 2 is attached along the first connecting guide 3 to which the water stop film 1 is attached before the muddy water mortar has hardened yet.
The second connecting guide 4 with attached is lowered. After setting the water-stop film 2 and the second connection guide 4 in the predetermined positions as shown in FIG. The grouting material 8 is sequentially injected downward and is expanded to press the water-stopping film 2 to the water-stopping film 1. Note that the water-stopping performance can be improved by wrapping an elastic rod 5 such as rubber in the water-stopping membrane 1 to improve adhesion.

By the above procedure, the vertical joint between the water-stop membrane 1 and the water-stop membrane 2 is completely water-tight.

In addition, when connecting using a locking pipe, a temporary guide 14 that can be inserted into the connecting guide 11 of the same type as the first connecting guide 3 is attached to the locking pipe 15, as shown in FIG. put. After installing the water-stop membrane and solidifying the muddy water, when connecting the next water-stop membrane, pull out the locking pipe 15 and connect the same type of connection guide 12 as the second connection guide 4 there. What is necessary is to insert it into the guide 11 and inject muddy water to solidify it.

Similarly, when connecting using a partition plate, connecting guides 22 and 23 are attached to both sides of one element as shown in Fig. 3, and after muddy water is injected into the adjacent elements, the connecting guides 22 and 23 are engaged with each connecting guide. Insert a type of connection guide.

Next, a method of attaching horizontal connecting members and braces for holding the connecting guides together will be explained. As shown in Fig. 4, horizontal connecting material 3 for holding between connecting guides.
4 is attached at an appropriate interval between the connecting guides 31 and 32 at both ends, and a diagonal brace is attached between the intermediate connecting guides 31 and 32 to which the horizontal connecting member 34 is attached.

Note that the present invention is not limited to the above embodiments, and various modifications are possible. For example, in the embodiment, a rectangular connecting guide is used, but it may be cylindrical or any other shape. That is, a first type of connection guide having an opening;
forming a hollow space in combination with a second type of connecting guide inserted so as to close the opening;
Any structure may be used as long as the grout material is injected into the balloon portion formed by the water-stop membrane in the hollow space and inflated to pressure-bond the water-stop membranes to be connected.
Further, in the above embodiment, a balloon portion is provided on the side of the water-stopping membrane to be added, but a balloon portion may also be provided on the other water-stopping membrane and inflated by injecting grout material in the same way. The arrangement of the first type of connection guide and the second type of connection guide may be reversed.

〔Effect of the invention〕

As is clear from the above description, the water-blocking wall according to the present invention is one in which a water-blocking membrane such as a rubber plate is inserted in place of the conventional steel sheet pile, and in the case of such a rubber-like water-blocking membrane, , band-shaped membrane plates are successively inserted, but the important issue is how to stop the vertical joint from leaking. In this regard, according to the present invention, water is stopped by inflating the water-stop membrane at the vertical joint part into a balloon shape and crimping it, so that more reliable water stop is possible by utilizing its elasticity. construction will also become possible. Furthermore, it has become possible to attach it to locking pipes and partition plates.

[Brief explanation of drawings]

Fig. 1 is a diagram showing one embodiment of a water-stop membrane vertical joint used in a water-shielding wall according to the present invention, Fig. 2 is a diagram for explaining a method of installing a locking pipe, and Fig. 3
The figure is a diagram for explaining how to install the partition plate.
The figure is a diagram for explaining a method of holding the connecting fitting. 1, 2, 13, 24 and 33...water-stop membrane, 3,
4, 11, 12, 22, 23, 31 and 32...Connection guide, 5...Elastic rod, 6...Tightening bolt, 7
... Balloon part, 8 ... Injection grout, 14 ... Temporary guide, 21 ... Partition plate, 34 ... Horizontal connecting material, 35
...Brace.

Claims (1)

[Scope of Claims] 1. A water-blocking wall configured by connecting water-blocking membranes using connecting guides, wherein the water-blocking membrane is held between a first connecting guide having an opening, and the first connecting guide An additional water-stop film connected to the water-stop film is sandwiched using a second connection guide that fits into the water-stop film, and a hollow space is formed at the fitting portion of the first connection guide and the second connection guide. 1. A water-shielding wall characterized in that a balloon portion is provided with a water-stopping film, and the balloon portion is injected with grout and inflated to press between the water-stopping films to seal water. 2. The water-shielding wall according to claim 1, wherein the second connection guide is inserted and fitted inside the first connection guide. 3. The water-shielding wall according to claim 1, wherein the balloon portion is formed by a water-stop film held between the second connection guides. 4. The water-blocking wall according to claim 1, wherein one of the water-blocking membranes is held in a hollow space by winding an elastic rod.