CN202131618U - Seepage-prevention joint device for underground diaphragm wall - Google Patents

Abstract

The utility model discloses a seepage-prevention joint device for an underground diaphragm wall, which is characterized in that the seepage-prevention joint device is composed of a vertical center steel pipe and four steel wing plates, wherein the four steel wing plates are vertically welded on the external wall of the center steel pipe to form a cross; and injected holes are arranged on the center steel pipe between every two adjacent steel wing plates. In the concrete pouring process, the injected holes are sealed by high-pressure air bags, and after the concrete pouring, the injected holes are used for grout injection, so as to achieve the purpose of seepage prevention. The device has the major advantages that the device is simple in structure and has good penetration-prevention effect, and no special construction tool is required.

Description

An underground diaphragm wall anti-seepage joint device

technical field

The invention belongs to the field of civil engineering, in particular to an anti-seepage joint device for an underground continuous wall.

Background technique

The underground diaphragm wall is an underground structure connected by multiple unit walls through diaphragm wall joints. Generally, the method of section-by-section construction is adopted, that is, a section of unit wall is constructed first, and the diaphragm wall joints are placed, and then adjacent sections are constructed. In the construction of the next section of the unit wall, the two sections of the wall are connected by joints. Therefore, the two sections of concrete poured at different times are prone to gaps at the joints. After the wall is formed, the pressurized water will penetrate through this part.

The current common I-beam and cross plate joints are not ideal in terms of anti-seepage effect, and seepage problems often occur.

Contents of the invention

The object of the present invention is to provide an anti-seepage joint device for an underground diaphragm wall to solve the common problem of pressurized water seepage in diaphragm wall construction.

The object of the present invention is achieved through the following technical solutions:

An anti-seepage joint device for an underground diaphragm wall, which is composed of a vertical central steel pipe and four wing steel plates, the four wing steel plates are vertically welded to the outer wall of the central steel pipe in a cross shape, and the two adjacent wing plates The central steel pipes between the steel plates are provided with grouting holes. The grouting holes are sealed with high-pressure airbags when pouring concrete.

Preferably, the wing steel plate is a rectangular plate whose long side is welded to the central steel pipe.

Preferably, the long side of the wing steel plate is equal to the length of the pipe.

Preferably, the radial extensions of the four wing steel plates all pass through the center line of the central steel pipe.

Preferably, the wing steel plates are divided into long and short wing steel plates, the longer short sides of the wing steel plates are long wing steel plates, and the shorter ones are short wing steel plates, each of the long and short wing steel plates has a pair and is arranged at intervals .

Preferably, the grouting holes are uniformly arranged on the entire central steel pipe.

Compared with the prior art, the present invention has the following advantages:

The present invention adopts the joint device to solve the problem of loose connection at the joints of the wall body, so that the wall sections are connected into a unified whole, so as to achieve a good anti-seepage effect.

Description of drawings

Fig. 1 is the structural representation of underground diaphragm wall anti-seepage joint device of the present invention;

Fig. 2 is a sectional view of Fig. 1;

Fig. 3 is a structural schematic diagram of the central steel pipe.

Detailed ways

Example 1

An anti-seepage joint device for an underground diaphragm wall is composed of a vertical central steel pipe 10 and four wing steel plates 20, and the four wing steel plates 20 are vertically welded to the outer wall of the central steel pipe 10 in a cross shape. The wing steel plate 20 is a rectangular plate whose long side is welded to the central steel pipe 10, and the long side is equal to the length of the pipe. The radial extensions of the four wing steel plates 20 all pass through the central line of the central steel pipe 10 . Wing steel plate 20 comprises a pair of long wing steel plates 21 and a pair of short wing steel plates 22, the longer short sides of wing steel plates are long wing steel plates 21, the shorter short sides are short wing steel plates 22, long and short wing steel plates 21, 22 interval settings. The central steel pipe 10 between two adjacent wing steel plates 20 is provided with grouting holes 11 , and the grouting holes are evenly arranged on the entire central steel pipe 10 .

The construction method of the anti-seepage joint device of the above-mentioned underground diaphragm wall is as follows:

1. First carry out the construction of a section of the unit wall, put the above-mentioned joint device into the steel cage at the same time, and put a high-pressure air bag in the central steel pipe, inflate it to seal the grouting hole, and pour concrete to make the long-wing steel plate of the joint device fixed within the section of the unit wall;

2. Carry out the construction of the adjacent next section of the unit wall, during which the pressure of the high-pressure airbag is maintained. After the concrete of the wall is poured, the airbag is removed, and the grout is injected into the upper port of the central steel pipe, and the slurry enters the wall joint through the grouting hole , so that the gap between the two sections of continuous wall is sealed to prevent the penetration of pressurized water.

Claims (6)

1. An underground diaphragm wall anti-seepage joint device is characterized in that it is made of a vertical central steel pipe and four wing steel plates, and the four wing steel plates are vertically welded on the outer wall of the central steel pipe to form a cross, so that Grouting holes are provided on the central steel pipes between the two adjacent wing steel plates. 2. The device according to claim 1, characterized in that, the wing steel plate is a rectangular plate whose long side is welded to the central steel pipe. 3. The device according to claim 2, wherein the long side of the wing steel plate is equal to the tube length. 4. The device according to claim 3, wherein the radial extensions of the four wing steel plates all pass through the center line of the central steel pipe. 5. The device according to claim 2, 3 or 4, wherein the wing steel plates are divided into long and short wing steel plates, the longer short sides of the wing steel plates are long wing steel plates, and the shorter ones are short wing steel plates Steel plates, the long and short wing steel plates each have a pair, and are arranged at intervals. 6. The device according to claim 5, wherein the grouting holes are evenly arranged on the entire central steel pipe.

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