Sandwich diaphragm wall hdpe membrane fast installation system based on modular design

Abstract

The application provides a sandwich-type impervious wall HDPE film rapid installation system based on a modular design, and belongs to the technical field of civil construction, and comprises a rack, wherein the rack is provided with an upper clamping assembly and a lower clamping assembly, and the second end of the rack is provided with a heating assembly; the upper clamping assembly comprises an upper connecting rod, a first clamping rod and a second clamping rod, and the first clamping rod and the second clamping rod are respectively abutted on both sides of the overlapping edge in the first HDPE film; the lower clamping assembly comprises a lower connecting rod, a third clamping rod and a fourth clamping rod, and the third clamping rod and the fourth clamping rod are clamped on both sides of the overlapping edge in the second HDPE film. The overlapping edges of the first HDPE film and the second HDPE film are clamped and straightened by the upper clamping assembly and the lower clamping assembly respectively, the overlapping edges are heated and welded by the heating assembly, the welding effect is improved, and the overlapping edges of the HDPE film are prevented from being wrinkled.

Description

Technical Field

[0001] The present invention relates to the technical field of civil engineering construction, in particular to a sandwich-type anti-seepage wall HDPE membrane rapid installation system based on modular design. Background Art

[0002] In the construction of water conservancy structures with anti-seepage requirements, vertical anti-seepage walls are the designer's preferred solution. In traditional design schemes, vertical anti-seepage walls are mainly composed of underground concrete continuous walls, cement-soil mixing piles, or self-setting mortar. The construction cost of concrete continuous walls is high and requires many supporting resources. Because the concrete wall directly affects the anti-seepage performance, the construction phase requires quality control of trenching, concrete, and steel bars. The quality requirements are high, and it is difficult to dismantle them after they are abandoned. Cement-soil mixing piles have high requirements for stratum conditions. In complex strata dominated by sand and gravel, they have poor deformation resistance and weak corrosion resistance. They are prone to cracking in long-term corrosive environments, which affects the anti-seepage function. The quality of the piles must be strictly controlled during construction. The construction of self-setting mortar anti-seepage walls requires strict control of the quality of the anti-seepage membrane joints. The position deviation of the anti-seepage membrane after it is lowered will also affect the anti-seepage performance.

[0003] In view of the problems of many control points and high construction costs in traditional construction plans, combined with our own construction experience and actual construction needs, we proposed a rapid installation construction process for HDPE anti-seepage membrane of sandwich anti-seepage wall, selected anti-seepage wall with self-setting mortar as the main body, and installed multiple HDPE membrane sheets on a self-assembling frame laying frame. The laying frame was used to assist in the lowering and connection of the HDPE anti-seepage membrane, thereby accelerating the construction speed of the anti-seepage wall.

[0004] Typically, multiple HDPE membrane sheets are laid simultaneously on the same laying frame, and adjacent HDPE membrane sheets need to be welded together. However, irregular overlap construction or uneven base layers can often lead to wrinkles at the overlapping edges of adjacent HDPE membrane sheets, affecting the connection and waterproofing performance of the HDPE membrane sheets. Summary of the Invention

[0005] The purpose of the present invention is to provide a sandwich-type anti-seepage wall HDPE membrane rapid installation system based on modular design, which can reduce the wrinkles on the overlapping edges of the HDPE membrane when welding multiple HDPE membrane sheets, thereby improving the connection effect of the HDPE membrane sheets and the anti-seepage performance of the anti-seepage wall.

[0006] The embodiments of the present invention are achieved through the following technical solutions: a modularly designed sandwich-type anti-seepage wall HDPE membrane rapid installation system, comprising a frame, wherein an upper clamping assembly and a lower clamping assembly are provided at a first end of the frame, the first end of the frame being the front end in the moving direction of the frame, and a heating assembly is provided at a second end of the frame, the heating assembly being directed toward the overlapping portion of the overlapping edges of the first HDPE membrane and the second HDPE membrane;

[0007] The upper clamping assembly includes an upper connecting rod, a first clamping rod, and a second clamping rod, wherein the first end of the upper connecting rod is connected to the frame, the first clamping rod and the second clamping rod are rotatably arranged on the second end of the upper connecting rod, the first clamping rod and the second clamping rod are arranged in parallel, and the first clamping rod and the second clamping rod respectively abut against both sides of the overlapping edge of the first HDPE film;

[0008] The lower clamping assembly includes a lower connecting rod, a third clamping rod and a fourth clamping rod. The first end of the lower connecting rod is connected to the frame, and the second end of the lower connecting rod is passed through the gap between the first HDPE film and the second HDPE film. The third clamping rod and the fourth clamping rod are rotatably connected to the second end of the lower connecting rod. The third clamping rod and the fourth clamping rod are arranged in parallel, and the third clamping rod and the fourth clamping rod are respectively clamped on both sides of the overlapping edge of the second HDPE film.

[0009] Furthermore, a pressing rod is provided at the second end of the frame. The pressing rod is located on the side of the heating component facing away from the first end of the frame, and the pressing rod abuts against the overlapping edge of the first HDPE film and the second HDPE film.

[0010] Furthermore, the pressing rod is rotatably connected to the frame, a pressing spring is provided between the pressing rod and the frame, a first end of the pressing spring is provided on the rod body of the pressing rod, and a second end of the pressing spring is provided on the frame.

[0011] Furthermore, the second end of the upper connecting rod is rotatably provided with an upper rotating frame, a through hole is opened on the first end of the upper rotating frame, the second end of the upper connecting rod is provided with a connecting screw, the connecting screw is passed through the through hole, and a fixing nut is threadedly connected to the connecting screw, the fixing nut abuts against the side of the upper rotating frame facing away from the upper connecting rod, and the second clamping rod is rotatably provided at the second end of the upper rotating frame.

[0012] Furthermore, a front rod is provided on the upper connecting rod, and the front rod is provided on the side of the upper connecting rod facing the forward direction. A lifting rod is provided at the end of the front rod, and the lifting rod is in contact with the side of the first HDPE film facing the second HDPE film. The distance between the lifting rod and the second HDPE film is greater than the distance between the second clamping rod and the second HDPE film.

[0013] Furthermore, a fixing hole is provided at the second end of the lower connecting rod, a bending rod is passed through the fixing hole, the first end and the second end of the bending rod are folded and parallel to each other, the third clamping rod is rotatably set on the rod body of the bending rod close to the first end, the fourth clamping rod is rotatably set on the rod body of the bending rod close to the second end, a limiting plate is provided on the first end of the bending rod, the first end of the bending rod is sleeved with an elastic spring, the first end of the elastic spring is fixed to the limiting plate, and the second end of the elastic spring is fixed to the second end of the lower connecting rod.

[0014] Furthermore, a plurality of adjustment holes are provided on the end face of the fixing hole, and the plurality of adjustment holes are distributed in a circular shape around the center of the fixing hole. A limiting rod is passed through the adjustment hole, and a sliding gap is provided in the limiting rod. An auxiliary rod is provided on the side face of the first end of the bending rod, and the auxiliary rod is slidably provided in the sliding gap, and the auxiliary rod abuts against the inner wall of the sliding gap.

[0015] Furthermore, the frame is provided with an abutting bent rod, the first end of which is passed through the gap between the overlapping edges of the first HDPE film and the second HDPE film, and the first end of the abutting bent rod is provided with an abutting plate, which is on the side of the second HDPE film facing away from the first HDPE film.

[0016] Furthermore, an abutting roller is provided on the frame, and the abutting roller abuts against a side surface of the first HDPE film facing the frame.

[0017] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0018] 1. The present invention straightens the overlapping edges of the first HDPE film and the second HDPE film respectively through the upper clamping component and the lower clamping component, and then heats and welds the overlapping overlapping edges through the heating component to improve the welding effect and avoid wrinkles on the overlapping edges of the HDPE film.

[0019] 2. The present invention sets an abutment plate on the bottom surface of the overlapping HDPE membrane, so that the abutment plate and the heating component face the two sides of the HDPE membrane respectively, and uses the abutment plate to support the HDPE membrane to prevent the uneven base layer from causing wrinkles on the HDPE membrane again. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 A schematic diagram of the overall structure of the HDPE membrane quick installation system for sandwich-type anti-seepage walls based on modular design provided by the present invention;

[0022] Figure 2 This is a schematic diagram of the abutting bent rod structure of the present invention;

[0023] Figure 3 This is a schematic structural diagram of the upper clamping assembly of the present invention;

[0024] Figure 4 This is a schematic structural diagram of the lower clamping assembly of the present invention;

[0025] Figure 5 for Figure 4 An enlarged schematic diagram of

[0026] Figure 6 It is a schematic diagram of another perspective of the structure of the present invention;

[0027] Icons: 100-frame; 110-heating assembly; 200-abutting bending rod; 210-first rod body; 220-second rod body; 230-abutting plate; 240-abutting roller; 300-upper clamping assembly; 310-upper connecting rod; 311-connecting screw; 312-fixing nut; 313-upper rotating frame; 314-perforation; 320-first clamping rod; 330-second clamping rod; 340-front rod; 341-lifting rod; 4 00-lower clamping assembly; 410-lower connecting rod; 411-fixing hole; 412-adjusting hole; 413-limiting rod; 414-sliding gap; 420-bending rod; 421-limiting plate; 422-elastic spring; 423-auxiliary rod; 430-third clamping rod; 440-fourth clamping rod; 500-pressing rod; 510-pressing spring; 520-pressing plate; 610-first HDPE film; 620-second HDPE film. DETAILED DESCRIPTION

[0028] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0029] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based upon these embodiments of the application, those skilled in the art who have the benefit of this application can obtain all other embodiments of the application without making an inventive effort.

[0030] Embodiments

[0031] The following will be further illustrated in conjunction with specific embodiments, with reference to Figures 1-6 The application is a sandwich type impervious wall HDPE film fast installation system based on modular design, comprising a rack 100, the rack 100 is placed at the overlapping edges of the first HDPE film 610 and the second HDPE film 620, and the overlapping edges of the first HDPE film 610 and the second HDPE film 620 are pressed and moved. Compared with the second HDPE film 620, the first HDPE film 610 is closer to the rack 100. The first end of the rack 100 faces the advancing direction of movement, and the second end of the rack 100 faces away from the advancing direction of movement.

[0032] Referring to Figure 1 , a heating assembly 110 is installed in the middle of the rack 100, the output end of the heating assembly 110 faces the overlapping edges of the first HDPE film 610 and the second HDPE film 620, and is used for heating and welding the overlapping edges of the first HDPE film 610 and the second HDPE film 620 together. The heating assembly 110 can be a hot air gun or a heating wire.

[0033] Referring to Figure 1 and Figure 2 , the middle of the rack 100 is also provided with an abutting bent rod 200, the first end of the abutting bent rod 200 is connected with the surface of the rack 100, the rod body of the abutting bent rod 200 comprises a first rod body 210 and a second rod body 220, the first rod body 210 is perpendicular to the second rod body 220, and the second rod body 220 is arranged between the first HDPE film 610 and the second HDPE film 620. The end of the second rod body 220 away from the first rod body 210 is provided with an abutting plate 230, the abutting plate 230 is arranged on the side of the second HDPE film 620 away from the first HDPE film 610, and the abutting plate 230 is opposite to the output end of the heating assembly 110.

[0034] Referring to Figure 1 , the middle of the rack 100 is also provided with an abutting roller 240, the abutting roller 240 is rolled against the side surface of the first HDPE film 610 away from the second HDPE film 620, so that the first HDPE film 610 and the second HDPE film 620 are straightly abutted.

[0035] Referring to Figure 1 The first end of the frame 100 is equipped with an upper clamping assembly 300 and a lower clamping assembly 400. The upper clamping assembly 300 is used to straighten the first HDPE film 610. The lower clamping assembly 400 is used to straighten the second HDPE film 620.

[0036] Reference Figure 1 and Figure 3 Specifically, the upper clamping assembly 300 includes an upper connecting rod 310, a first clamping rod 320, and a second clamping rod 330. The first end of the upper connecting rod 310 is fixedly connected to the frame 100, and the second end of the upper connecting rod 310 faces the first HDPE film 610. A connecting screw 311 is provided on the second end of the upper connecting rod 310, perpendicular to the direction of movement of the frame 100. A fixing nut 312 is threadedly connected to the connecting screw 311. An upper rotating frame 313 is rotatably mounted on the connecting screw 311. A through-hole 314 is formed at the top of the upper rotating frame 313, and the connecting screw 311 is inserted into the through-hole 314. Tightening the fixing nut 312 against the end of the through-hole 314 fixes the upper rotating frame 313 relative to the upper connecting rod 310. The first clamping rod 320 and the second clamping rod 330 are disposed on the upper rotating frame 313, and the first clamping rod 320 and the second clamping rod 330 are parallel to each other. The first HDPE film 610 is inserted into the gap between the first clamping rod 320 and the second clamping rod 330. The first clamping rod 320 and the second clamping rod 330 are respectively in contact with the two sides of the first HDPE film 610, and the first HDPE film 610 is clamped by the first clamping rod 320 and the second clamping rod 330.

[0037] Reference Figure 1 and Figure 3 The upper connecting rod 310 is mounted with a front rod 340, which is located on the side of the upper connecting rod 310 facing the forward direction. The front rod 340 is mounted with a lifting rod 341, which is arranged parallel to the first clamping rod 320. The distance between the lifting rod 341 and the second HDPE film 620 is greater than the distance between the second clamping rod 330 and the second HDPE film 620, so that the lifting rod 341 separates the first HDPE film 610 from the second HDPE film 620 in the forward direction.

[0038] Reference Figure 1 and Figure 4The lower clamping assembly 400 is located on the side of the upper clamping assembly 300 that is closer to the forward direction. The lower clamping assembly 400 includes a lower connecting rod 410, a bending rod 420, a third clamping rod 430, and a fourth clamping rod 440. The first end of the lower connecting rod 410 is fixedly connected to the frame 100, and the second end of the lower connecting rod 410 faces the overlapping portion of the first HDPE film 610 and the second HDPE film 620. A fixing hole 411 is defined at the second end of the lower connecting rod 410. The bending rod 420 is U-shaped, with the angle between the first and second ends of the bending rod 420 being 360 degrees, so that the first and second ends of the bending rod 420 are parallel. The first end of the bending rod 420 is inserted into the gap between the first and second HDPE films 610, 620. The second end of the bending rod 420 is positioned on the side of the second HDPE film 620 that faces away from the first HDPE film 610. The third clamping rod 430 is rotatably mounted on the first end of the bending rod 420, and the fourth clamping rod 440 is rotatably mounted on the second end of the bending rod 420. The third clamping rod 430 and the fourth clamping rod 440 abut against both sides of the second HDPE film 620 respectively.

[0039] Reference Figure 4 and Figure 5 The first end of the bending rod 420 is inserted into the fixing hole 411. A limit plate 421 is fixedly mounted on the rod body near the first end of the bending rod 420. An elastic spring 422 is sleeved on the first end of the bending rod 420. The first end of the elastic spring 422 is fixed to the limit plate 421, and the second end of the elastic spring 422 is fixed to the second end of the lower connecting rod 410 of the bending rod 420. The second end of the lower connecting rod 410 also has multiple adjustment holes 412, which are arranged in a circular pattern around the center of the fixing hole 411. The adjustment holes 412 are arranged parallel to the fixing hole 411. A limit rod 413 is inserted into the adjustment hole 412, and a sliding gap 414 is defined within the limit rod 413. An auxiliary rod 423 is provided at the end of the rod body of the first end of the bending rod 420. The auxiliary rod 423 protrudes from the rod body of the bending rod 420 and abuts the inner wall of the sliding gap 414. Change the position of the limiting rod 413 inserted into the adjustment hole 412, use the inner wall of the sliding gap 414 to change the angle between the bending rod 420 and the lower connecting rod 410, and adjust the clamping force of the third clamping rod 430 and the fourth clamping rod 440 on the second HDPE film 620.

[0040] Reference Figure 6The second end of the rack 100 is rotatably installed with a pressing rod 500, the first end of the pressing rod 500 is rotatably connected with the rack 100, and the rod body close to the first end of the pressing rod 500 is installed with a pressing spring 510, the other end of the pressing spring 510 is connected with the rack 100. The second end of the pressing rod 500 is rotatably installed with a pressing plate 520, the surface of the pressing plate 520 is provided with a rotating shaft, and the second end of the pressing rod 500 is rotatably connected with the rotating shaft. The pressing rod 500 is pressed against the overlapping edges of the first HDPE film 610 and the second HDPE film 620 under the elastic force of the pressing spring 510, which can not only press the welding position, but also avoid the welding position of the first HDPE film 610 and the second HDPE film 620 from moving with the rack 100, and cooperate with the upper clamping assembly 300 and the lower clamping assembly 400 to respectively straighten the first HDPE film 610 and the second HDPE film 620.

[0041] The working process of the embodiment is as follows: first, lay the first HDPE film 610 and the second HDPE film 620 on the laying rack, and make the overlapping edges of the first HDPE film 610 and the second HDPE film 620 coincide with each other.

[0042] Then, adjust the direction of the rack 100, so that the rack 100 moves along the overlapping edge coincidence area of the first HDPE film 610 and the second HDPE film 620. The upper clamping assembly 300 is clamped to the first HDPE film 610, the position of the upper rotating frame 313 relative to the upper connecting rod 310 is adjusted, so that the first clamping rod 320 and the second clamping rod 330 press the first HDPE film 610. The lifting rod 341 abuts against the side of the first HDPE film 610 facing the second HDPE film 620. The lower clamping assembly 400 is clamped to the second HDPE film 620. By inserting the limiting rod 413 into the adjusting hole 412 at the corresponding position, the auxiliary rod 423 on the bending rod 420 is limited to rotate around the center of the fixed hole 411. During the movement of the rack 100, the overlapping width of the first HDPE film 610 and the second HDPE film 620 may be too wide or too narrow, the bending part of the bending rod 420 abuts against the edge of the second HDPE film 620, the elastic spring 422 is used to pull the bending rod 420 to move relative to the axis direction of the fixed hole 411, and the auxiliary rod 423 is made to slide along the sliding gap 414.

[0043] The pressing rod 500 presses the first and second HDPE films 610, 620 against the rear end of the heating assembly 110, while the upper clamping assembly 300 and the lower clamping assembly 400 respectively clamp the first and second HDPE films 610, 620 against the front end of the heating assembly 110. This ensures that the first and second HDPE films 610, 620 facing the output end of the heating assembly 110 are flat, allowing the heating assembly 110 to heat and weld. Furthermore, the abutment plate 230 prevents wrinkles in the film due to an uneven laying frame, ensuring that the film is fixed to the laying frame in a flat and connected state.

[0044] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A modular design-based sandwich-type anti-seepage wall HDPE membrane rapid installation system, characterized by: The invention comprises a frame (100), wherein an upper clamping assembly (300) and a lower clamping assembly (400) are provided at a first end of the frame (100), the first end of the frame (100) is a front end in a moving direction of the frame (100), and a heating assembly (110) is provided at a second end of the frame (100), and the heating assembly (110) faces a position where overlapping edges of a first HDPE film (610) and a second HDPE film (620) overlap. The upper clamping assembly (300) comprises an upper connecting rod (310), a first clamping rod (320) and a second clamping rod (330), wherein the first end of the upper connecting rod (310) is connected to the frame (100), the first clamping rod (320) and the second clamping rod (330) are rotatably arranged on the second end of the upper connecting rod (310), the first clamping rod (320) and the second clamping rod (330) are arranged in parallel, and the first clamping rod (320) and the second clamping rod (330) respectively abut against two sides of the overlapping edge of the first HDPE film (610); The lower clamping assembly (400) includes a lower connecting rod (410), a third clamping rod (430) and a fourth clamping rod (440), wherein the first end of the lower connecting rod (410) is connected to the frame (100), the second end of the lower connecting rod (410) is inserted into the gap between the first HDPE film (610) and the second HDPE film (620), the third clamping rod (430) and the fourth clamping rod (440) are rotatably connected to the second end of the lower connecting rod (410), the third clamping rod (430) and the fourth clamping rod (440) are arranged in parallel, and the third clamping rod (430) and the fourth clamping rod (440) are respectively clamped on both sides of the overlapping edge of the second HDPE film (620); The upper connecting rod (310) is provided with a front rod (340), and the front rod (340) is provided on the side of the upper connecting rod (310) facing the forward direction. The end of the front rod (340) is provided with a lifting rod (341), and the lifting rod (341) is in contact with the side of the first HDPE film (610) facing the second HDPE film (620). The distance between the lifting rod (341) and the second HDPE film (620) is greater than the distance between the second clamping rod (330) and the second HDPE film (620); The frame (100) is provided with an abutting bent rod (200), the first end of which is inserted into the gap between the overlapping edges of the first HDPE film (610) and the second HDPE film (620), and the first end of which is provided with an abutting plate (230), the abutting plate (230) being on the side of the second HDPE film (620) facing away from the first HDPE film (610).

2. The modular design-based sandwich-type anti-seepage wall HDPE membrane rapid installation system according to claim 1, characterized in that: The second end of the frame (100) is further provided with a pressing rod (500), the pressing rod (500) being located on a side of the heating component (110) facing away from the first end of the frame (100), and the pressing rod (500) abuts against the overlapping portion of the lap edges of the first HDPE film (610) and the second HDPE film (620).

3. The modular design-based sandwich-type anti-seepage wall HDPE membrane rapid installation system according to claim 2, characterized in that: The pressing rod (500) is rotatably connected to the frame (100), and a pressing spring (510) is provided between the pressing rod (500) and the frame (100). The first end of the pressing spring (510) is provided on the rod body of the pressing rod (500), and the second end of the pressing spring (510) is provided on the frame (100).

4. The modular design-based sandwich-type anti-seepage wall HDPE membrane rapid installation system according to claim 1, characterized in that: The second end of the upper connecting rod (310) is rotatably provided with an upper rotating frame (313), a through hole (314) is opened on the first end of the upper rotating frame (313), the second end of the upper connecting rod (310) is provided with a connecting screw (311), the connecting screw (311) is passed through the through hole (314), a fixing nut (312) is threadedly connected to the connecting screw (311), the fixing nut (312) is abutted against the side of the upper rotating frame (313) facing away from the upper connecting rod (310), and the second clamping rod (330) is rotatably provided at the second end of the upper rotating frame (313).

5. The modular design-based sandwich-type anti-seepage wall HDPE membrane rapid installation system according to claim 1, characterized in that: The second end of the lower connecting rod (410) is provided with a fixing hole (411), and a bending rod (420) is passed through the fixing hole (411). The first end and the second end of the bending rod (420) are folded and parallel to each other. The third clamping rod (430) is rotatably arranged on the rod body of the bending rod (420) close to the first end. The fourth clamping rod (440) is rotatably arranged on the rod body of the bending rod (420) close to the second end. A limiting plate (421) is provided on the first end of the bending rod (420). An elastic spring (422) is sleeved on the first end of the bending rod (420). The first end of the elastic spring (422) is fixed to the limiting plate (421), and the second end of the elastic spring (422) is fixed to the second end of the lower connecting rod (410).

6. The modular design-based sandwich-type anti-seepage wall HDPE membrane rapid installation system according to claim 5, characterized in that: The end surface of the fixing hole (411) is provided with a plurality of adjustment holes (412), and the plurality of adjustment holes (412) are distributed in a circular manner around the center of the fixing hole (411). A limiting rod (413) is passed through the adjusting hole (412), and a sliding gap (414) is provided in the limiting rod (413). An auxiliary rod (423) is provided on the side surface of the first end of the bending rod (420), and the auxiliary rod (423) is slidably provided in the sliding gap (414), and the auxiliary rod (423) abuts against the inner wall of the sliding gap (414).

7. The modular design-based sandwich cut-off wall HDPE membrane rapid installation system according to claim 1, characterized in that: The frame (100) is provided with an abutting roller (240), and the abutting roller (240) abuts against a side surface of the first HDPE film (610) facing the frame (100).

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