Airtight connection device and method for vertical flexible anti-seepage wall

Abstract

The present invention provides a sealed connection device and method for a vertical flexible anti-seepage wall. The sealed connection device includes a three-link support structure, a support joint, and a flexible membrane insertion structure. The three-link support structure is composed of three connecting rings with gaps connected in a transverse direction. The connecting rings on both sides have membrane-passing gaps facing the transverse outwards, and the middle connecting ring has a longitudinal embedded gap. One side of the support joint is inserted into the embedded gap and fixed. The flexible membrane insertion structure includes a flexible membrane and a core wire connected to the side of the flexible membrane. The core wire is inserted into the connecting ring on one side of the three-link support structure, and the flexible membrane passes through the membrane-passing gap. The present invention integrates the joint structure and the sealed structure into one, which not only facilitates construction and prevents conflicts, but also improves construction speed and anti-seepage effect.

Description

Technical Field

[0001] The invention relates to a sealing connection device of a vertical flexible anti-seepage wall and a construction method thereof, and relates to the field of environmental treatment of polluted sites. Background Art

[0002] Some pollutants leaked during the production process, long-term storage of solid waste or leachate generated in landfills will leak into the ground. In the treatment of contaminated sites, in many cases it is necessary to block the contaminated medium to prevent the pollution radius from further expanding and causing harm to the human body and the surrounding environment.

[0003] Barrier technology involves laying down a barrier layer to block the migration and diffusion of pollutants in the soil medium, isolating the polluted medium from the surrounding environment. This prevents pollutants from coming into contact with the human body and migrating with precipitation or groundwater, potentially posing a threat to both the human body and the surrounding environment. Barrier technology includes both horizontal and vertical barriers. Vertical barrier technologies include high-pressure jet grouting walls, mixing pile walls, underground continuous walls, HDPE membrane walls, and infiltration reaction walls.

[0004] Compared with other barrier walls, HDPE membrane vertical flexible anti-seepage wall has the advantages of good anti-seepage performance, high corrosion resistance, strong anti-deformation ability and long service life. However, the connection between two adjacent HDPE membranes is the key difficulty in the construction of vertical flexible anti-seepage wall.

[0005] The trenching construction process of the HDPE membrane vertical flexible anti-seepage wall is similar to that of the underground continuous wall. It needs to be constructed in sections, and joint structures need to be set at the connections between each section to withstand the lateral pressure of the soil.

[0006] The HDPE membrane vertical flexible anti-seepage wall also needs to be equipped with a sealed structure at each connection point to ensure the airtightness of the anti-seepage wall interface.

[0007] The above-mentioned joint structure is at the same position as the sealed structure, and the two structures are prone to conflict with each other during construction, affecting the effect of the sealed connection of the anti-seepage wall. Summary of the Invention

[0008] The purpose of the present invention is to provide a closed connection device and method for a vertical flexible anti-seepage wall, so as to solve the problem of conflict between the joint structure and the closed structure and ensure the airtightness of the connection points between each anti-seepage wall.

[0009] To achieve the above object, the technical solution adopted by the present invention is:

[0010] A closed connection device for a vertical flexible anti-seepage wall, characterized by comprising a three-link bearing structure, a support joint and a flexible membrane plug structure, wherein:

[0011] The three-link supporting structure is composed of three connecting rings with gaps connected in a transverse direction. The connecting rings on both sides have through-membrane gaps toward the transverse outside, and the middle connecting ring has an embedded gap toward the longitudinal direction.

[0012] One side of the support joint is inserted into the embedded slit and fixed;

[0013] The flexible membrane insertion structure includes a flexible membrane and a core wire connected to the side of the flexible membrane. The core wire is inserted into the connecting ring on one side of the three-link supporting structure, and the flexible membrane passes through the membrane through-slit.

[0014] The closed connection device of the vertical flexible anti-seepage wall, wherein: the closed connection device is arranged in the groove, the three-link supporting structure is close to one side of the groove wall, and the other side of the supporting joint is against the other side of the groove wall.

[0015] The sealed connection device of the vertical flexible anti-seepage wall, wherein: the three connection rings are of the same size and are made of HDPE material.

[0016] The closed connection device of the vertical flexible anti-seepage wall, wherein: the supporting joint is a cross steel, and its arm span width is equal to the groove width.

[0017] The closed connection device of the vertical flexible anti-seepage wall, wherein: the flexible membrane insertion structure is formed by the side of the flexible membrane being fixed on the core wire by rolling and welding into a loop.

[0018] The airtight connection device of the vertical flexible anti-seepage wall, wherein: the flexible membrane is a HDPE membrane.

[0019] The airtight connection device for the vertical flexible anti-seepage wall, wherein: the core wire is a steel strand.

[0020] The airtight connection device of the vertical flexible anti-seepage wall is characterized in that anti-seepage material is injected into the gaps of each connection ring.

[0021] A method for sealing connection of a vertical flexible anti-seepage wall, using the aforementioned sealed connection device of the vertical flexible anti-seepage wall, is characterized by:

[0022] One side of the support joint is inserted into the embedded slit of the three-link support structure and fixed, the support joint and the three-link support structure are lowered into the groove, the three-link support structure is in contact with one side of the groove wall, and the other side of the support joint is in contact with the other side of the groove wall;

[0023] The flexible membrane insert structure is lowered into the groove. During this process, the core wire of the flexible membrane insert structure is vertically inserted into the connecting ring on the side of the three-link supporting structure, and the flexible membrane passes vertically through the membrane through-slit.

[0024] The closed connection method of the vertical flexible anti-seepage wall comprises the following steps: after the flexible membrane insert structure is lowered into the groove, anti-seepage material is injected into the gaps between the connection rings.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention has a simple structure and is easy to construct.

[0027] 2. Except for the core wire wrapped by the flexible membrane plug structure, the sealing structure can be made of HDPE material, which has high impermeability and corrosion resistance.

[0028] 3. Solved the problem of conflict between the construction joint structure and the position of the sealed connection device during the construction of the cut-off wall.

[0029] 4. On the basis of ensuring the airtight connection of the flexible membrane, the support effect on the excavated trough body can be enhanced by the cross support joint connected to the airtight structure to prevent the side wall collapse of the construction trough section. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the overall structure of the closed connection device of the vertical flexible anti-seepage wall provided by the present invention;

[0031] Figure 2 It is a schematic diagram of the three-link bearing structure of the present invention;

[0032] Figure 3 is a schematic diagram of the flexible membrane plug structure.

[0033] Explanation of reference numerals: cross support joint 1; three-link supporting structure 2; connecting rings 21, 22, 23; membrane through-slit 24; embedded slit 25; flexible membrane insertion structure 3; coiled and welded loop 31; core wire 32. DETAILED DESCRIPTION

[0034] like Figure 1 、 Figure 2 、 Figure 3 As shown, the present invention provides a closed connection device for a vertical flexible anti-seepage wall, which is used to connect two adjacent flexible membranes in a groove. For convenience, the horizontal extension direction of the groove is referred to as the transverse direction, and the groove width direction is referred to as the longitudinal direction. The closed connection device includes a three-link support structure 2, a cross support joint 1, and a flexible membrane insertion structure 3, wherein:

[0035] The three-link supporting structure 2 is composed of three connecting rings 21, 22, and 23 with notches connected in an integral manner along the transverse direction. The three connecting rings 21, 22, and 23 are of the same size and are preferably made of HDPE material. The outer diameter of each connecting ring 21, 22, and 23 is about 90 mm and the thickness is about 8.2 mm. The connecting rings 21 and 23 on both sides have a membrane-through slit 24 on the transverse outer side, and the middle connecting ring 22 has an embedded slit 25 on the longitudinal direction. Specifically, the width of the membrane-through slit 24 is slightly larger than the thickness of the flexible membrane, preferably about 10 mm; the width of the embedded slit 25 is slightly larger than the thickness of the cross support joint 1, preferably 15-18 mm.

[0036] The cross support joint 1 is preferably made of cross steel, with an arm width equal to the groove width and a thickness of 10-13 mm. One side arm of the cross support joint 1 is inserted into the embedded slit 25 and fixed, so that the three-link support structure 2 is close to one side groove wall 4, and the other side arm of the cross support joint 1 abuts against the other side groove wall 4, so as to help the three-link support structure 2 withstand the lateral pressure of the soil.

[0037] The flexible membrane insert structure 3 is formed by the side of the flexible membrane being fixed on the core wire 32 by coiling and welding into a loop 31. The flexible membrane is preferably made of HDPE membrane. The core wire 32 can be made of steel strand or other flexible materials. The core wire 32 is inserted into the connecting rings 21, 22, and 23 on one side of the three-link support structure 2. The flexible membrane passes through the membrane through-slit 24. In this way, two adjacent flexible membrane insert structures 3 can be tightly connected through the three-link support structure 2.

[0038] After the above connection is completed, anti-seepage material can be injected into the gaps between the connection rings 21, 22, 23 to ensure the anti-seepage property of the sealed connection device.

[0039] When the present invention is used:

[0040] First, insert one side arm of the cross support joint 1 into the embedding slit 25 of the three-link support structure 2 and secure it. Then, lower the cross support joint 1 and the three-link support structure 2 into the groove together. The three-link support structure 2 is in contact with one side groove wall 4, and the other side arm of the cross support joint 1 is in contact with the other side groove wall 4.

[0041] Then, the flexible membrane insert structure 3 is lowered into the groove. During this process, the core wire 32 of the flexible membrane insert structure 3 is vertically inserted into the connecting rings 21, 22, and 23 on the side of the three-link supporting structure 2, and the flexible membrane passes vertically through the membrane through-slit 24.

[0042] Finally, anti-seepage material may be injected into the gaps between the connecting rings 21 , 22 , 23 to ensure the anti-seepage property of the sealed connecting device.

[0043] The airtight connection device for the vertical flexible anti-seepage wall provided by the present invention integrates the joint structure and the airtight structure into one, which not only facilitates construction and prevents conflicts, but also improves construction speed and anti-seepage effect.

Claims

1. A closed connection device for a vertical flexible anti-seepage wall, characterized by: It includes a three-link bearing structure, a supporting joint and a flexible membrane plug structure, wherein: The three-link supporting structure is composed of three connecting rings with gaps connected in a transverse direction. The connecting rings on both sides have through-membrane gaps toward the transverse outside, and the middle connecting ring has an embedded gap toward the longitudinal direction. One side of the support joint is inserted into and fixed to the embedded slit; The flexible membrane insertion structure includes a flexible membrane and a core wire connected to the side of the flexible membrane. The core wire is inserted into the connecting ring on one side of the three-link supporting structure. The flexible membrane passes through the membrane through-slit. The material of the three connecting rings is HDPE material.

2. The airtight connection device for a vertical flexible anti-seepage wall according to claim 1, characterized in that: The sealed connection device is arranged in the groove, the three-link supporting structure is close to one side of the groove wall, and the other side of the supporting joint is in contact with the other side of the groove wall.

3. The airtight connection device for a vertical flexible anti-seepage wall according to claim 1, characterized in that: The support joint is a cross steel, and its arm span width is equal to the groove width.

4. The airtight connection device for a vertical flexible anti-seepage wall according to claim 1, characterized in that: The flexible membrane inserting structure is formed by the side edge of the flexible membrane being rolled into a loop and fixed on the core wire.

5. The airtight connection device for a vertical flexible anti-seepage wall according to claim 1, characterized in that: The flexible film is a HDPE film.

6. The airtight connection device for a vertical flexible anti-seepage wall according to claim 1, characterized in that: The core wire is a steel strand.

7. The airtight connection device for a vertical flexible anti-seepage wall according to claim 1, characterized in that: Anti-seepage material is also injected into the gaps between the connecting rings.

8. A method for sealing connection of vertical flexible cutoff walls, using the sealed connection device of a vertical flexible cutoff wall according to any one of claims 1 to 7, characterized in that: One side of the support joint is inserted into the embedded slit of the three-link support structure and fixed, the support joint and the three-link support structure are lowered into the groove, the three-link support structure is in contact with one side of the groove wall, and the other side of the support joint is in contact with the other side of the groove wall; The flexible membrane insert structure is lowered into the groove. During this process, the core wire of the flexible membrane insert structure is vertically inserted into the connecting ring on the side of the three-link supporting structure, and the flexible membrane passes vertically through the membrane through-slit.

9. The airtight connection method of a vertical flexible anti-seepage wall according to claim 8, characterized in that: After the flexible membrane insert structure is lowered into the groove, anti-seepage material is injected into the gaps between the connecting rings.

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