A support device and method for using HDPE membrane composite diaphragm wall in underground construction

Abstract

This application provides a combined installation frame device for HDPE membranes used in diaphragm walls. The combined installation frame device includes a combined installation frame body, which comprises an upper part, a middle part, a lower part, and a bottom part connected sequentially from top to bottom. The upper part includes a tensioning main frame; the middle part includes at least one standard main frame; the lower part includes at least one adjusting main frame; and the bottom part includes a counterweight fixing main frame. A first tension ring is provided at the top of the HDPE membrane, and a counterweight block is connected to the bottom. The counterweight block has an insertion hole. A second tension ring is provided on the tensioning main frame. The first and second tension rings are connected by a tensioning device. A positioning pin is provided at the bottom of the counterweight fixing main frame. The positioning pin can be movably inserted into the insertion hole. This combined installation frame device for HDPE membranes in diaphragm walls is convenient to assemble, reuse, transport, and transfer, and can meet the needs of different installation depths.

Description

Technical Field

[0001] This application relates to the field of diaphragm wall technology, and in particular to a device for installing a support frame for an HDPE membrane assembly in a diaphragm wall and its usage method. Background Technology

[0002] Diaphragm walls are now widely used in temporary or permanent seepage control projects in the aforementioned fields. The maximum permeability coefficient of existing seepage control walls is around 10-9 m / s. Due to the diversity of groundwater and soil, their ability to resist chemical erosion is poor, and their durability is very limited. They may not be able to meet the high seepage control requirements of certain environments such as hazardous pollutants and heavy chemical environments.

[0003] HDPE geomembranes are now widely used in civil engineering, mining, water conservancy and environmental engineering fields in China. As a seepage prevention or isolation function, they have very good corrosion resistance and ductility. HDPE geomembranes with a thickness of up to 3mm and a width of more than 6 meters are now maturely produced in China. They can be overlapped into any width using mature hot melt welding. The testing technology is mature and they have been widely used in engineering fields such as open landfills.

[0004] The composite structure of diaphragm walls and HDPE membranes conforms to underground seepage control walls and is used in permanent civil engineering, mining, water conservancy, and environmental engineering projects for groundwater and pollutant seepage control. It can meet the requirements of lower permeability (below 10-11 m / s) and better durability. Traditional underground installation of HDPE membranes using membrane laying machines can only be done at shallow depths, which cannot meet the needs of situations requiring deeper installation of HDPE membrane sheets. Summary of the Invention

[0005] The purpose of this application is to address the above-mentioned problems by providing a support device and method for using a scaffolding system for underground continuous wall HDPE membrane assemblies.

[0006] In a first aspect, this application provides a combined lowering frame device for diaphragm wall HDPE membrane, used for lowering HDPE membrane. The combined lowering frame device includes a combined lowering frame body; the combined lowering frame body includes an upper part, a middle part, a lower part, and a bottom part connected sequentially from top to bottom; the upper part includes a tensioning main frame; the middle part includes at least one standard main frame; the lower part includes at least one adjusting main frame; the bottom part includes a counterweight fixing main frame; the top of the HDPE membrane is provided with a first tensioning ring, and the bottom is connected with a counterweight block; the counterweight block is provided with an insertion hole; the tensioning main frame is provided with a second tensioning ring; the first tensioning ring and the second tensioning ring are connected by a tensioning device; the bottom of the counterweight fixing main frame is provided with a positioning pin; the positioning pin is movably inserted into the insertion hole.

[0007] According to the technical solutions provided in certain embodiments of this application, tensioning extension frames are respectively connected to both sides of the tensioning main frame; standard extension frames are respectively connected to both sides of the standard main frame; adjustment extension frames are respectively connected to both sides of the adjusting main frame; and counterweight fixing extension frames are respectively connected to both sides of the counterweight fixing main frame.

[0008] According to the technical solutions provided in certain embodiments of this application, the counterweight is a concrete block or a steel block, and its shape is a cuboid.

[0009] According to the technical solutions provided in certain embodiments of this application, the top of the HDPE film is fixed between two angle steel pieces by bolts; the first tension ring is welded to either of the angle steel pieces.

[0010] According to the technical solutions provided in certain embodiments of this application, the counterweight is fixed to the bottom of the HDPE membrane by a pressure plate and bolts; the counterweight and the pressure plate are respectively disposed on both sides of the HDPE membrane.

[0011] According to the technical solutions provided in certain embodiments of this application, at least one wind rope is connected to the main body of the combined lower frame.

[0012] According to the technical solutions provided in some embodiments of this application, the tensioning main frame is also provided with lifting rings for easy hoisting.

[0013] According to the technical solutions provided in certain embodiments of this application, guide limiting plates are respectively provided at both ends of the bottom.

[0014] According to the technical solutions provided in some embodiments of this application, the height of the adjustable main frame is less than the height of the standard main frame.

[0015] Secondly, this application provides a method for using any of the above-mentioned underground continuous wall HDPE membrane assembly support devices, comprising the following steps:

[0016] The number of standard main frames and adjustable main frames is determined according to the depth of the lower frame, and then assembled with the tensioning main frame and the counterweight fixing main frame to obtain the combined lower frame;

[0017] Install a counterweight at the bottom of the HDPE membrane;

[0018] Insert the positioning pin of the combined lower frame into the insertion hole on the counterweight at the bottom of the HDPE film, connect the top of the HDPE film to the top of the combined lower frame, and tension the HDPE film using the tensioning device.

[0019] The lifting assembly lower frame is used to lower the HDPE film. Once the film is in place, the HDPE film is released, and the HDPE film and counterweight are separated from the assembly lower frame.

[0020] Compared with the prior art, the beneficial effects of this application are as follows: The underground continuous wall HDPE membrane assembly frame device is easy to assemble by setting up a tensioning main frame, at least one standard main frame, at least one adjusting main frame and a counterweight fixing main frame. In use, it can be assembled according to the actual installation depth requirements, which can not only meet the requirements of different installation depths, but also be reused and facilitate transportation and transfer; by setting up counterweight blocks and positioning pins that cooperate with the counterweight block insertion holes, it helps the HDPE membrane overcome its own buoyancy underwater or in mud, which facilitates stable positioning and installation. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of the support device for the HDPE membrane assembly of the underground continuous wall provided in Embodiment 1 of this application;

[0022] Figure 2 This is a side view of the supporting structure of the HDPE membrane assembly for underground continuous wall provided in Embodiment 1 of this application;

[0023] Figure 3 This is a schematic diagram of the HDPE membrane structure of the scaffolding device for the underground continuous wall HDPE membrane assembly provided in Embodiment 1 of this application;

[0024] Figure 4 This is a schematic diagram of the counterweight block of the underground continuous wall HDPE membrane assembly under-frame device provided in Embodiment 1 of this application;

[0025] Figure 5 This is a top view of the counterweight block of the scaffolding device for the HDPE membrane assembly of the underground continuous wall provided in Embodiment 1 of this application.

[0026] The text labels in the image represent:

[0027] 100. Combined lower frame body; 101. Tensioning main frame; 102. Standard main frame; 103. Adjustable main frame; 104. Counterweight fixed main frame; 105. Second tensioning ring; 106. Positioning pin; 107. Tensioning extension frame; 108. Standard extension frame; 109. Adjustable extension frame; 110. Counterweight fixed extension frame; 111. Guy rope; 112. Lifting ring; 113. Guide limit plate;

[0028] 200. HDPE film; 201. First pull ring; 202. Counterweight; 203. Insertion hole; 204. Angle steel sheet; 205. Pressure plate. Detailed Implementation

[0029] To enable those skilled in the art to better understand the technical solution of this application, the application will be described in detail below with reference to the accompanying drawings. The description in this section is only exemplary and explanatory, and should not be used to limit the scope of protection of this application.

[0030] Example 1

[0031] Please refer to Figures 1 to 5 This embodiment provides a combined lowering frame device for underground continuous wall HDPE membranes, used for lowering HDPE membranes 200. The combined lowering frame device includes a combined lowering frame body 100; the combined lowering frame body 100 is used to assist the HDPE membrane 200 in being lowered to deeper underground areas and is reusable; the combined lowering frame body 100 includes an upper part, a middle part, a lower part, and a bottom part connected sequentially from top to bottom; the upper part includes a tensioning main frame 101; the middle part includes at least one standard main frame 102; the lower part includes at least one adjusting main frame 103; the height of the adjusting main frame 103 is less than the height of the standard main frame 102; the bottom part includes a counterweight fixing main frame 104.

[0032] In use, various numbers of standard main frames 102 and adjustable main frames 103 are selected and installed together with tensioning main frames 101 and counterweight fixing main frames 104 to meet the needs of different lowering depths.

[0033] The tensioning main frame 101, the standard main frame 102, the adjusting main frame 103, and the counterweight fixing main frame 104 are all made of commonly used steel profiles. The tensioning main frame 101 and the standard main frame 102, adjacent standard main frames 102 and the standard main frame 102, the standard main frame 102 and the adjusting main frame 103, adjacent adjusting main frames 103 and the adjusting main frame 103, and the adjusting main frame 103 and the counterweight fixing main frame 104 can all be detachably connected by high-strength bolts to form a complete installation frame. After the diaphragm installation is completed, the frame can be disassembled for easy transportation and transfer. Of course, the various parts can also be connected by a combination of segmented welding and bolting.

[0034] The HDPE membrane 200 has a first pull ring 201 at the top and a counterweight 202 at the bottom. Since the specific gravity of the HDPE membrane is less than 1, it cannot be stably placed underwater or in slurry on its own. Therefore, the buoyancy of the HDPE membrane in the wall needs to be considered, and a counterweight 202 is provided to help the HDPE membrane 200 overcome its own buoyancy in the slurry, and at the same time, it can play a certain guiding and positioning role for the HDPE membrane 200. The counterweight 202 has an insertion hole 203. The tensioning main frame 101 has a second pull ring 105. The first pull ring 201 and the second pull ring 105 are connected by a tensioning device (not shown). The tensioning device can be a hand-operated hoist or a rope tensioner, etc. The bottom of the counterweight fixing main frame 104 has a positioning pin 106. The positioning pin 106 can be movably inserted into the insertion hole 203.

[0035] Furthermore, in practical applications, the width of the HDPE membranes to be installed varies, ranging from 4 meters to 8 meters. To meet the installation requirements of HDPE membranes of different widths, the various parts of the above-mentioned combined installation frame body 100 can be laterally expanded to increase the usable area. Specifically, tensioning extension frames 107 are connected to both sides of the tensioning main frame 101; standard extension frames 108 are connected to both sides of the standard main frame 102; adjusting extension frames 109 are connected to both sides of the adjusting main frame 103; and counterweight fixing extension frames 110 are connected to both sides of the counterweight fixing main frame 104. The above connections can be achieved using high-strength bolts.

[0036] Furthermore, the counterweight 202 is a concrete block or a steel block, and its shape is cuboid. The length of the counterweight 202 is equal to or slightly smaller than the width of the HDPE film 200. In this embodiment, the counterweight 202 is a concrete block. During the manufacturing process, the concrete block can be pre-embedded with PVC pipes to create insertion holes, i.e., one end of the PVC pipe faces the outside of the concrete block.

[0037] Furthermore, the top of the HDPE film 200 is fixed between two angle steel pieces 204 by bolts; the first tension ring 201 is welded to either of the angle steel pieces 204.

[0038] Furthermore, the counterweight 202 is fixed to the bottom of the HDPE membrane 200 by a pressure plate 205 and bolts; the counterweight 202 and the pressure plate 205 are respectively disposed on both sides of the HDPE membrane 200. For concrete counterweights, the nut end of the bolt can be pre-embedded inside during the manufacturing process, and the bolt shank end can extend to the outside of the concrete block. In use, it is fixedly connected to the HDPE membrane by the extended bolt shank end and the pressure plate 205.

[0039] Furthermore, at least one wind rope 111 is connected to the combined lower frame body 100. The wind rope 111 can be a plastic rope. Due to the frequent wind during field operations, the membrane is suspended together with the lower frame during lowering, resulting in a large area and a large windward area, which makes it prone to deflection. By setting the wind rope 111, the operator can adjust and control the movement direction of the lower frame and HDPE membrane from a slightly farther distance to ensure safe lowering.

[0040] Furthermore, the tensioning main frame 101 is provided with lifting rings 112 to facilitate hoisting by a crane.

[0041] Furthermore, guide limiting plates 113 are provided at both ends of the bottom, which helps to limit the position of the HDPE film.

[0042] Furthermore, the height of the adjustable main frame 103 is less than the height of the standard main frame 102.

[0043] The HDPE membrane combined lowering frame device for diaphragm walls provided in this application embodiment is used as follows: First, the number of standard main frames and adjusting main frames is determined according to the lowering depth, and they are assembled with the tensioning main frame and the counterweight fixing main frame to obtain the combined lowering frame. Alternatively, according to the actual width requirements, a corresponding number of tensioning extension frames, standard extension frames, adjusting extension frames, and counterweight fixing extension frames can be assembled to obtain the final combined lowering frame. Second, the first pull ring is assembled on the top of the HDPE membrane, and the counterweight is assembled on the bottom. Next, the insertion hole of the counterweight is aligned with the positioning pin at the bottom of the combined lowering frame. The distance between the first and second pull rings is gradually shortened by the tensioning device, causing the HDPE membrane to tighten, and the positioning pin is inserted into the corresponding insertion hole. Finally, the combined lowering frame is lifted by a crane, and the HDPE membrane is lowered. After lowering into place, the HDPE membrane is released by the tensioning device, and the crane lifts the combined lowering frame. Due to gravity, the HDPE membrane and the counterweight gradually detach from the combined lowering frame.

[0044] Example 2

[0045] This embodiment provides a method for using the scaffolding device for underground continuous wall HDPE membrane assembly as described in Embodiment 1, including the following steps:

[0046] The number of standard main frames and adjustable main frames is determined according to the depth of the lower frame, and then assembled with the tensioning main frame and the counterweight fixing main frame to obtain the combined lower frame;

[0047] Install a counterweight at the bottom of the HDPE membrane;

[0048] Insert the positioning pin of the combined lower frame into the insertion hole on the counterweight at the bottom of the HDPE film, connect the top of the HDPE film to the top of the combined lower frame, and tension the HDPE film using the tensioning device.

[0049] The lifting assembly lower frame is used to lower the HDPE film. Once the film is in place, the HDPE film is released, and the HDPE film and counterweight are separated from the assembly lower frame.

[0050] This document uses specific examples to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the methods and core ideas of this application. The above descriptions are only preferred embodiments of this application. It should be noted that due to the limitations of written expression, while there are objectively infinite specific structures, those skilled in the art can make several improvements, modifications, or changes without departing from the principles of this invention, and can also combine the above technical features in an appropriate manner. These improvements, modifications, changes, or combinations, or the direct application of the inventive concept and technical solution to other situations without modification, should all be considered within the scope of protection of this application.

Claims

1. A diaphragm HDPE membrane assembly setting device for setting an HDPE membrane (200) in a diaphragm, characterized in that, The combined lower setting frame device comprises a combined lower setting frame body (100); the combined lower setting frame body (100) comprises an upper part, a middle part, a lower part and a bottom part connected in sequence from top to bottom; the upper part comprises a tension main body frame (101); the middle part comprises at least one standard main body frame (102); the lower part comprises at least one adjusting main body frame (103); the height of the adjusting main body frame (103) is less than the height of the standard main body frame (102); the bottom part comprises a counterweight fixed main body frame (104); the HDPE film (200) is provided with a first tension ring (201) at the top and a counterweight block (202) at the bottom; the counterweight block (202) is provided with a jack (203); the tension main body frame (101) is provided with a second tension ring (105); the first tension ring (201) and the second tension ring (105) are connected through a tension device; the bottom of the counterweight fixed main body frame (104) is provided with a positioning pin (106); the positioning pin (106) is movably inserted into the jack (203); The two sides of the tension main body frame (101) are respectively connected with a tension expansion frame (107); the two sides of the standard main body frame (102) are respectively connected with a standard expansion frame (108); the two sides of the adjusting main body frame (103) are respectively connected with an adjusting expansion frame (109); the two sides of the counterweight fixed main body frame (104) are respectively connected with a counterweight fixed expansion frame (110); The number of the standard main body frame (102) and the adjusting main body frame (103) is determined according to the lower setting depth, and is assembled with the tension main body frame (101) and the counterweight fixed main body frame (104); according to the actual width requirement, a corresponding number of the tension expansion frame (107), the standard expansion frame (108), the adjusting expansion frame (109) and the counterweight fixed expansion frame (110) are assembled to obtain the final combined lower setting frame body (100); After being set in place, the HDPE film (200) is loosened through the tension device, and the combined lower setting frame body (100) is lifted by the crane; due to the gravity, the HDPE film (200) and the counterweight block (202) gradually separate from the combined lower setting frame body (100).

2. The underground diaphragm wall HDPE membrane assembly setting device according to claim 1, characterized in that, The counterweight block (202) is a concrete block or a profile steel block, and has a cuboid shape.

3. The underground diaphragm wall HDPE membrane assembly setting device according to claim 1, characterized in that, The top of the HDPE film (200) is fixed between two angle steel sheets (204) through bolts; the first tension ring (201) is welded on any one of the angle steel sheets (204).

4. The underground diaphragm wall HDPE membrane assembly setting device according to claim 1, characterized in that, The counterweight block (202) is fixed with the bottom of the HDPE film (200) through a pressing plate (205) and bolts; the counterweight block (202) and the pressing plate (205) are respectively arranged on the two sides of the HDPE film (200).

5. The underground diaphragm wall HDPE membrane assembly setting up device according to claim 1, characterized in that, At least one wind rope (111) is connected to the combined lower setting frame body (100).

6. The underground diaphragm wall HDPE membrane assembly setting up device according to claim 1, characterized in that, A lifting ring (112) is further arranged on the tension main body frame (101) for facilitating hoisting.

7. The underground diaphragm wall HDPE membrane assembly setting up device according to claim 1, characterized in that, Guide limiting plates (113) are arranged at the two ends of the bottom part.

8. The method of using a diaphragm wall HDPE membrane assembly setting frame assembly according to any one of claims 1 to 7, wherein, The method comprises the following steps: According to the lower depth determination standard body frame and adjusting the number of body frame, and with the tension body frame and counterweight fixed body frame assembly, according to the actual width needs, assembly corresponding number of tension expansion frame (107), standard expansion frame (108), adjusting expansion frame (109) and counterweight fixed expansion frame (110), get the final combination of the lower set body (100); Install the counterweight on the bottom of the HDPE film; Insert the positioning pin of the combination of the lower set body (100) into the insertion hole on the counterweight on the bottom of the HDPE film, connect the top of the HDPE film with the top of the combination of the lower set body (100), and tension the HDPE film through the tensioning device; Hoist the combination of the lower set body (100), drive the HDPE film to be set, and after being set in place, release the HDPE film, and separate the HDPE film and the counterweight from the combination of the lower set body (100).

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