A sealing structure during the construction of an HDPE geomembrane composite impervious wall

Abstract

The present invention discloses a blocking structure during the construction of an HDPE geomembrane composite impervious wall. The blocking structure is arranged in an impervious trench, and the impervious trench includes a constructed section and an unconstructed section. The blocking structure is used to prevent the backfill in the constructed section from flowing towards the unconstructed section. The blocking structure includes: a segmented pipe, which is arranged vertically between the constructed section and the unconstructed section, and the starting end of the composite impervious wall is located between the segmented pipe and the unconstructed section; a buffer pipe, which is arranged vertically in the constructed section; a blocking membrane, including a fixed end and a free end, the fixed end is connected to the outer wall of the segmented pipe, and the free end is bent between the segmented pipe and the buffer pipe and then extends between the composite impervious wall and the buffer pipe. The blocking structure effectively prevents the backfill on the constructed side of the impervious trench from flowing towards the unconstructed side, reduces the process of cleaning the backfill on the unconstructed side, shortens the construction period, accelerates the stability of the trench section, and improves construction safety.

Description

Technical Field

[0001] The present invention relates to the field of geomembrane anti-seepage, and more specifically, to a blocking structure during the construction of a composite anti-seepage wall of HDPE geomembrane. Background Art

[0002] In flexible vertical anti-seepage construction, a trench is first dug, and the depth of the trench is usually more than ten meters. Then, the first geomembrane is vertically placed in the trench. After subsequent construction on one side of the geomembrane, when the next geomembrane is installed, backfilling of composite anti-seepage materials is involved, and blocking measures need to be taken to prevent muck or composite anti-seepage materials from flowing to the connection part, which may affect the subsequent membrane installation construction.

[0003] Therefore, it is expected to develop a blocking structure during the construction of a composite anti-seepage wall of HDPE geomembrane, which can effectively prevent the backfill materials in the construction of HDPE geomembrane and composite anti-seepage materials from flowing into the unconstructed side, shorten the backfilling time, accelerate the stability of the trench section, and improve construction safety. Summary of the Invention

[0004] The object of the present invention is to propose a blocking structure during the construction of a composite anti-seepage wall of HDPE geomembrane, so as to solve the problem that the backfill materials in the construction of HDPE geomembrane and composite anti-seepage materials spread to the unconstructed side.

[0005] To achieve the above object, the present invention proposes a blocking structure during the construction of a composite anti-seepage wall of HDPE geomembrane. The blocking structure is arranged in an anti-seepage trench, and the anti-seepage trench includes a constructed section and an unconstructed section. The blocking structure is used to prevent the backfill materials in the constructed section from flowing to the unconstructed section. The blocking structure includes:

[0006] A segmented pipe, which is arranged vertically between the constructed section and the unconstructed section, and the starting end of the composite anti-seepage wall is located between the segmented pipe and the unconstructed section;

[0007] A buffer pipe, which is arranged vertically in the constructed section;

[0008] A blocking membrane, including a fixed end and a free end. The fixed end is connected to the outer wall of the segmented pipe, and the free end is bent between the segmented pipe and the buffer pipe and then extends to between the composite anti-seepage wall and the buffer pipe.

[0009] As a preferred solution, the top surface of the segmented pipe is higher than the top surface of the backfill material; and / or

[0010] The top surface of the buffer pipe is higher than the top surface of the backfill material.

[0011] As a preferred embodiment, the upper end of the barrier film is higher than the top surface of the backfill material, and the lower end of the barrier film is located at the bottom of the anti-seepage trench.

[0012] As a preferred embodiment, the anti-seepage trench includes opposite first sidewall and second sidewall. The composite anti-seepage wall geomembrane is arranged on one side of the first sidewall, the segmented pipe is connected to the second sidewall, and the buffer pipe is connected to the second sidewall.

[0013] As a preferred embodiment, the fixed end of the barrier film is connected to the position of the segmented pipe closest to the composite anti-seepage wall geomembrane and is in close contact with the composite anti-seepage wall geomembrane.

[0014] As a preferred embodiment, the bent part of the free end between the segmented pipe and the buffer pipe is U-shaped. One end of the U-shape is connected to the composite anti-seepage wall, and the other end extends between the composite anti-seepage wall and the buffer pipe.

[0015] As a preferred embodiment, the barrier film is an HDPE geomembrane, and / or the segmented pipe is an HDPE pipe.

[0016] As a preferred embodiment, the thickness of the barrier film is 1.5 mm or 2.0 mm.

[0017] As a preferred embodiment, the buffer pipe is formed by sequentially connecting a plurality of steel pipes.

[0018] The beneficial effects of the present invention are as follows: effectively prevent the backfill material on the construction side in the anti-seepage trench from flowing to the unconstructed side during the construction of the geomembrane and the composite anti-seepage material, reduce the process of cleaning the backfill material on the unconstructed side, shorten the construction period, accelerate the stability of the trench section, and improve construction safety.

[0019] The structure of the present invention has other characteristics and advantages, which will be obvious from the accompanying drawings incorporated herein and the subsequent specific embodiments, or will be described in detail in the accompanying drawings incorporated herein and the subsequent specific embodiments. These accompanying drawings and specific embodiments are jointly used to explain the specific principles of the present invention. Description of the Drawings

[0020] By describing the exemplary embodiments of the present invention in more detail in conjunction with the accompanying drawings, the above-mentioned and other objects, features, and advantages of the present invention will become more obvious. In the exemplary embodiments of the present invention, the same reference numerals generally represent the same components.

[0021] Figure 1 Shows a top view of a blocking structure during the construction of an HDPE geomembrane composite anti-seepage wall according to an embodiment of the present invention.

[0022] Description of the Reference Numerals in the Drawings

[0023] 1 - Anti-seepage trench; 2 - Soil mass; 3 - Bentonite slurry for retaining wall; 4 - Composite anti-seepage wall; 41 - Starting end of the composite anti-seepage wall; 5 - Blocking structure; 51 - Segmented pipe; 52 - Barrier film; 53 - Buffer pipe; 6 - Backfill material. Detailed implementation manners

[0024] The present invention will be described in more detail below with reference to the accompanying drawings. Although the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0025] An embodiment of the present invention provides a blocking structure during the construction of an HDPE geomembrane composite anti-seepage wall. Figure 1 The top view of a blocking structure during the construction of an HDPE geomembrane composite anti-seepage wall according to an embodiment of the present invention is shown. Please refer to Figure 1 , the blocking structure 5 is arranged in the anti-seepage trench 1. The anti-seepage trench 1 includes a construction section and an unconstructed section. The side where the backfill material 6 is located is the construction section, and the side where the soil mass 2 is located is the unconstructed section. There is bentonite slurry 3 on the unconstructed side. The starting end 41 of the geomembrane composite anti-seepage wall is close to one of the side walls of the anti-seepage trench 1. The blocking structure 5 is used to prevent the backfill material 6 in the construction section from flowing to the unconstructed section. The blocking structure 5 includes:

[0026] The segmented pipe 51 is arranged vertically between the construction section and the unconstructed section, and the starting end 41 of the composite anti-seepage wall is located between the segmented pipe 51 and the unconstructed section;

[0027] The buffer pipe 53 is arranged vertically in the construction section;

[0028] The barrier film 52 includes a fixed end and a free end. The fixed end is connected to the outer wall of the segmented pipe 51, and the free end bends between the segmented pipe 51 and the buffer pipe 52 and then extends between the composite anti-seepage wall 4 and the buffer pipe 53.

[0029] Specifically, the segmented pipe 51 is perpendicular to the bottom surface of the anti-seepage trench 1 and is vertically arranged to separate the constructed section from the unconstructed section. The size of the segmented pipe 51 is slightly smaller than that of the anti-seepage trench 1. The segmented pipe 51 is used to prevent the backfill 6 from spreading to the unconstructed section. The buffer pipe 53 is perpendicular to the bottom surface of the anti-seepage trench 1 and is vertically arranged. The size of the buffer pipe 53 is slightly smaller than that of the anti-seepage trench 1. In this embodiment, the anti-seepage trench 1 includes opposite first sidewall and second sidewall, and the composite anti-seepage wall 4 is arranged on the first sidewall. There is a certain gap between the composite anti-seepage wall 4, the segmented pipe 51 and the buffer pipe 53. The segmented pipe 51 is connected to the second sidewall, and the buffer pipe 53 is connected to the second sidewall. The segmented pipe 51 and the buffer pipe 53 are sealed with the second sidewall, so that the backfill 6 in the constructed section cannot flow into the unconstructed section near the second sidewall.

[0030] In this embodiment, the top surface of the segmented pipe 51 is higher than the top surface of the backfill 6, and the top surface of the buffer pipe 53 is also higher than the top surface of the backfill 6, so as to prevent the backfill 6 from flowing into the unconstructed section from above the segmented pipe 51 and the buffer pipe 53.

[0031] The fixed end of the barrier film 52 is connected to the outer wall of the segmented pipe 51, and the other end (free end) of the barrier film 52 bends between the segmented pipe 51 and the buffer pipe 53 and then extends to the space between the composite anti-seepage wall 4 and the buffer pipe 53. The barrier film 52 is a flexible film. In this embodiment, the barrier film is an HDPE (high density polyethylene) geomembrane, and the thickness of the barrier film is 1.5 mm or 2.0 mm. The barrier film 52 and the segmented pipe 51 together prevent the backfill 6 from spreading towards the unconstructed section. The segmented pipe 51 is an HDPE pipe. In this embodiment, the specification of the segmented pipe 51 is DN560. The fixed end of the barrier film 52 is welded to the outer wall of the segmented pipe 51 (the barrier film 52 and the segmented pipe 51 are welded throughout from top to bottom). The upper end of the barrier film 52 is higher than the top surface of the backfill 6, and the lower end of the barrier film 52 is located at the bottom of the anti-seepage trench 1. Usually, the width of the barrier film 52 is greater than 2 meters.

[0032] In this embodiment, the fixed end of the barrier film 52 is connected to the position of the segmented pipe 51 closest to the composite impervious wall 4 and is in close contact with the composite impervious wall 4. The bent portion of the free end between the segmented pipe 51 and the buffer pipe 53 is U-shaped (the cross-sectional shape of the barrier film 52 between the segmented pipe 51 and the buffer pipe 53 is U-shaped). One end of the U-shape is in close contact with the composite impervious wall 4, and the other end extends between the composite impervious wall 4 and the buffer pipe 53. The buffer pipe 53 presses against the free end of the barrier film 52 to reduce the lateral pressure of the backfill 6 on the barrier film 52 and the segmented pipe 51. The buffer pipe 53 is a steel pipe. Since the depth of the anti-seepage trench 1 varies, in one embodiment, the buffer pipe 53 is formed by sequentially connecting a plurality of steel pipes with a diameter of not less than 550 mm from top to bottom.

[0033] In other embodiments, the fixed end of the barrier film 52 can be fixed at other positions of the segmented pipe 51, such as on the wall surface of the segmented pipe 51 opposite to the buffer pipe 53.

[0034] The embodiments of the present invention have been described above. The above description is exemplary and not exhaustive, and is not limited to the disclosed embodiments. Many modifications and variations are obvious to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A blocking structure during the construction of an HDPE geomembrane composite impervious wall. The blocking structure is arranged in an impervious trench, and the impervious trench includes a constructed section and an unconstructed section. The blocking structure is used to prevent the backfill material in the constructed section from flowing to the unconstructed section, and is characterized in that, The blocking structure includes: A segmented pipe, which is arranged vertically between the constructed section and the unconstructed section, and the starting end of the composite impervious wall is located between the segmented pipe and the unconstructed section; A buffer pipe, which is arranged vertically in the constructed section; A barrier film, including a fixed end and a free end. The fixed end is connected to the outer wall of the segmented pipe, and the free end is bent between the segmented pipe and the buffer pipe and then extends between the composite impervious wall and the buffer pipe; The impervious trench includes opposite first side wall and second side wall. The HDPE geomembrane is arranged on one side of the first side wall. The segmented pipe is connected to the second side wall, and the buffer pipe is connected to the second side wall; The fixed end of the barrier film is connected to the position of the segmented pipe closest to the geomembrane of the composite impervious wall and is in close contact with the geomembrane of the composite impervious wall; The bent part of the free end between the segmented pipe and the buffer pipe is U-shaped. One end of the U-shaped is in close contact with the composite impervious wall, and the other end extends between the composite impervious wall and the buffer pipe.

2. The sealing structure during the construction of the HDPE geomembrane composite impervious wall according to claim 1, characterized in that, The top surface of the segmented pipe is higher than the top surface of the backfill material; and / or The top surface of the buffer pipe is higher than the top surface of the backfill material.

3. The blocking structure during the construction of the HDPE geomembrane composite impervious wall according to claim 1, characterized in that, The upper end of the barrier film is higher than the top surface of the backfill material, and the lower end of the barrier film is located at the bottom of the impervious trench.

4. The blocking structure in the construction process of the HDPE geomembrane composite impervious wall according to claim 1, characterized in that, The barrier film is an HDPE geomembrane, and / or The segmented pipe is an HDPE pipe.

5. The sealing structure during the construction of the HDPE geomembrane composite impervious wall according to claim 1, characterized in that, The thickness of the barrier film is 1.5 mm or 2.0 mm.

6. The blocking structure in the construction process of the HDPE geomembrane composite impervious wall according to claim 1, characterized in that, The buffer pipe is formed by sequentially connecting a plurality of steel pipes.

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