A diaphragm wall construction system and method

Abstract

The present application relates to underground continuous wall construction technical field, disclose a kind of underground continuous wall construction system and method, excavating mechanism includes steel frame, its both ends are provided with driving gear and driven gear by chain cooperation, chain is equipped with several earth cutting plate, top connection steel pipe, steel pipe bottom end extends to the outside of driven gear, top end connects slurry pump, slurry pump is located in slurry pool, slurry pool is communicated with sedimentation tank, sedimentation tank is communicated with groove to realize excavation and dredging synchronization;H-shaped steel, one side is detachably connected with nylon bag, for segmented insertion into groove bottom, the shape of the nylon bag is corrugated, and the filled nylon bag cooperates with the H-shaped steel to form a concrete partition for sealing;The present application carries out excavation and dredging simultaneously;And the groove section uses concrete partition during the process of pouring concrete, avoids the phenomenon of slurry leakage and slurry running in the joint;The corrugated nylon bag ensures that the underground wall joint is firm and stable.

Description

A construction system and method for diaphragm walls Technical Field

[0001] This invention relates to the field of diaphragm wall construction technology, and in particular to a diaphragm wall construction system and method. Background Technology

[0002] The construction of underground walls typically involves using various trenching machines and the protective effect of slurry to excavate narrow, deep trenches underground. Appropriate materials are then poured into these trenches to form a continuous underground wall with waterproof, retaining, and load-bearing functions. However, current underground wall construction faces the following problems:

[0003] (1) It is impossible to carry out trench excavation and dredging simultaneously, resulting in low construction efficiency;

[0004] (2) During the concrete pouring process, the joint formwork of the trench section was not properly sealed, resulting in leakage and grout runoff.

[0005] (3) The joints of the underground wall after the concrete is poured are not firm, which affects the integrity of the entire continuous wall.

[0006] (4) During the excavation process, the cutting board is affected by the terrain and the soil is thickly adhered to it. If it is not cleaned in time, the cutting board will carry the soil during excavation, which will affect the excavation efficiency of the cutting board. Summary of the Invention

[0007] To address the shortcomings of existing technologies, the purpose of this invention is to provide a construction system and method for underground continuous walls, which allows for simultaneous excavation and dredging; and during the concrete pouring process, concrete partitions are used in the trench section to prevent grout leakage and runoff at the joints; corrugated nylon bags ensure that the joints of the underground wall are firm and stable.

[0008] To achieve the above objectives, the present invention is implemented through the following technical solution:

[0009] Firstly, a diaphragm wall construction system includes:

[0010] The excavation mechanism includes a steel frame with a drive gear and a driven gear at both ends connected by a chain. Several cutting plates are installed on the chain. A steel pipe is connected to the top of the steel frame. The bottom end of the steel pipe extends to the outside of the driven gear, and the top end is connected to a mud pump. The mud pump is located in a mud pit. The mud pit is connected to a sedimentation tank. The sedimentation tank is connected to a trench to achieve simultaneous excavation and dredging.

[0011] An H-beam, with one side detachably connected to a nylon bag, is used for segmented insertion into the bottom of the trench. The nylon bag is corrugated in shape. After being filled, the nylon bag, together with the H-beam, forms a concrete partition to eliminate grout leakage and runoff.

[0012] As a further implementation, the driven gear includes a first driven gear and a second driven gear, with the driven gear located at the bottom of the steel frame and the second driven gear located directly above the first driven gear.

[0013] As a further implementation, the cutting plate is located at the bottom of the chain, and the two sides of the bottom of the chain are rotatably connected to the scissors via a pivot. The scissors are located on the cutting side of the cutting plate, and the handle at the top of the scissors extends to the top of the chain by a set distance. A reset component is provided at the pivot.

[0014] As a further implementation, wedges are provided on both sides of the bottom of the steel frame near the drive gear. The outer surface of the wedges is inclined and is set in accordance with the handle. The inclined surface cooperates with the handle to push the scissors to rotate on the cutting surface of the cutting plate and cut off the slag.

[0015] As a further implementation, the length of the cutting plate is greater than the distance between the two sets of shears, and the bottom of the shears is flush with or higher than the bottom of the cutting plate.

[0016] As a further implementation, the width of the nylon bag is greater than the width of the groove, and the height of the H-beam is greater than the height of the groove.

[0017] Secondly, a method for constructing a diaphragm wall, employing any of the diaphragm wall construction systems described above, includes the following steps:

[0018] During trench excavation, the chain rotates counterclockwise driven by the drive gear. The cutting plate continuously passes the driven gear and excavates the excavated soil. The cutting plate carries the excavated soil past the wedge, and the wedge pushes the shears to rotate and cut off the excavated soil on the cutting plate. Afterward, the shears are reset by the reset component. During excavation, the mud pump continuously pumps out mud. Large mud particles are settled in the sedimentation tank and then returned to the trench for dredging.

[0019] The trench is divided into multiple trench sections according to its length. For each trench section, H-beams and nylon bags are constructed to form partitions. First, mud is injected into the nylon bags to fill them and then they are sealed. Then, concrete is poured into the nylon bags to form concrete partitions. Next, concrete is poured into the trench section enclosed by the concrete partitions. Finally, the H-beams are removed. Multiple trench sections are poured in sequence to form a diaphragm wall.

[0020] As a further implementation, before the trench is excavated, a guide trench needs to be excavated along the longitudinal axis of the underground wall, and reinforced concrete guide walls are built on both sides of the guide trench. A wooden support is set every 2 meters on the inner side of the guide wall.

[0021] As a further implementation, during the trench excavation process, mud slurry needs to be continuously injected into the trench to keep the trench full of slurry.

[0022] As a further implementation, the top of the nylon bag is attached to the top of the H-beam. During the removal of the H-beam, the nylon bag detaches from the H-beam and remains in the concrete.

[0023] The beneficial effects of the present invention are as follows:

[0024] 1. The steel frame of this invention is connected to a steel pipe at the top, the bottom of which extends to the outside of the driven gear, and the top is connected to a mud pump. The mud pump is located in a mud pit, which is connected to a sedimentation tank. The sedimentation tank is connected to a trench to enable simultaneous excavation and dredging. Large mud particles can be deposited in the sedimentation tank, while small mud particles can return to the trench to provide support.

[0025] 2. This invention uses filled nylon bags in conjunction with H-steels to form a concrete partition to eliminate grout leakage and runoff. The nylon bags are corrugated in shape. The filled nylon bags play a sealing role in the concrete partition, and the corrugated structure increases the contact area between the nylon bags and the subsequent concrete wall joint, ensuring that the joint is firm and stable.

[0026] 3. The design of the wedge, scissors, and handle in this invention allows the wedge to push the handle to rotate when the handle passes the wedge, thereby causing the scissors to cut off the soil on the cutting plate. Soil will never stick to the cutting plate, thus improving the digging efficiency of the cutting plate.

[0027] 4. The shears of the present invention are located on the excavation side of the cutting board, and the length of the cutting board is greater than the shear spacing. The bottom end of the shears is higher than the bottom plate of the cutting board, which ensures the protective function of the cutting board on the shears and prevents the shears from being damaged. Attached Figure Description

[0028] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0029] Figure 1 is a schematic diagram of the overall structure of the excavation mechanism in an embodiment of the present invention;

[0030] Figure 2 is a cross-sectional schematic diagram of the chain in an embodiment of the present invention;

[0031] Figure 3 is a cross-sectional schematic diagram of the chain located at the wedge in an embodiment of the present invention;

[0032] Figure 4 is a schematic diagram of the wedge structure in an embodiment of the present invention;

[0033] Figure 5 is a schematic diagram of the construction principle of concrete pouring and concrete partition in an embodiment of the present invention.

[0034] The diagram exaggerates the spacing or dimensions between parts to show their positions; the diagram is for illustrative purposes only.

[0035] Among them: 1. Wire pipe, 2. Steel pipe, 3. Ground plane, 4. Trench, 16. Trench bottom; 5. Drive gear, 12. First driven gear, 15. Second driven gear, 6. Chain, 14. Steel frame;

[0036] 7. Wedge, 21. Wedge, 10. Soil cutting board;

[0037] 8. First pivot, 9. First pin sleeve, 11. First blade handle, 13. First scissors

[0038] 18. Second pivot, 19. Second pin sleeve, 17. Second blade handle, 20. Second scissors

[0039] 22. H-beams, 23. Nylon bags, 24. Pre-cast concrete, 25. Conduit pipes, 26. Concrete hoppers, 27. Square steel. Detailed Implementation

[0040] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0041] Example 1

[0042] In a typical embodiment of the present invention, referring to Figure 1, a diaphragm wall construction system includes an excavation mechanism for excavating excavated soil, nylon bags 23 and H-beams 22 for pouring concrete. The excavation mechanism drives a cutting plate 10 to excavate excavated soil via a chain 6. The equipment is also equipped with a steel pipe 2, which is used to pump out mud via a mud pump while excavating, so as to realize the simultaneous dredging and excavation.

[0043] As shown in Figure 1, the excavation mechanism includes a steel frame 14, which needs to be tilted during excavation to excavate downwards from the bottom.

[0044] The steel frame 14 is supported at both ends by a drive gear 5 and a driven gear connected by a chain. The driven gear includes a first driven gear 12 and a second driven gear 15. The driven gear is located at the bottom of the steel frame, and the second driven gear 15 is located directly above the first driven gear 12. As shown in Figure 1, in this embodiment, the bottom of the steel frame refers to the lower left end of the steel frame in Figure 1, and the top end refers to the upper right end of the steel frame in Figure 1. The drive gear is located at the top of the steel frame 14. The steel frame 14 is a long strip-shaped support frame made of steel, and the length of the steel frame 14 is selected according to the excavation depth.

[0045] A planetary reducer is installed at the drive gear of the steel frame 14. The planetary reducer drives the drive gear 5 to rotate. The planetary reducer is driven by a hydraulic motor shaft coupling. The drive gear 5 drives the driven gear to rotate through the chain 6.

[0046] As shown in Figure 1, several cutting plates are evenly distributed on the chain. The cutting plates are located at the bottom of the chain. When the cutting plate reaches the driving gear 5 from the first driven gear 12, the excavation is completed. Afterward, the cutting plate passes the driving gear 5 and is located on the chain 6 between the second driven gear 15 and the driving gear 5. At this time, the cutting plate is located above the chain and does not participate in the excavation. Since the first driven gear 12 is located directly below the second driven gear 15, the chain 6 between them is in a vertical state, which ensures that the sidewalls of the excavated trench are vertical.

[0047] As shown in Figure 2, the cutting plate 10 is a rectangular high-strength manganese steel plate. One side of the cutting plate near the chain is fixed to the bottom surface of the chain, and the other side away from the chain is bent at a certain angle and has a serrated cutting edge.

[0048] As shown in Figure 1, the top of the steel frame 14 is connected to a steel pipe. The upper part of the steel pipe is fixed to the upper position of the steel frame by a connecting plate, and the lower part of the steel pipe is fixed to the lower position of the steel frame by a connecting plate. The connecting plate is not shown in the figure.

[0049] The bottom end of steel pipe 2 extends to the outside of the driven gear, and the top end of steel pipe 2 is connected to the mud pump through steel wire pipe 1. The mud pump is placed in the mud tank, which is connected to the sedimentation tank, and the sedimentation tank is connected to the trench.

[0050] The bottom end of steel pipe 2 is positioned at a height corresponding to the first driven gear 12, allowing for real-time extraction of mud via a mud pump during the excavation process of the cutting plate 10. The mud is first pumped into a mud pit, with large mud particles remaining in a filtration tank, while smaller mud particles return to the trench via a sedimentation tank, providing support for the excavated trench. This cycle enables simultaneous excavation and dredging. Large particles of silt are removed to prevent interference with subsequent concrete pouring.

[0051] As shown in Figures 1-4, a first pin sleeve 9 and a second pin sleeve 19 are provided on both sides of the bottom of the chain. The first pin sleeve 9 and the second pin sleeve 19 are sleeve structures. A first rotating shaft 8 is provided in the middle of the first shear 13, and a second rotating shaft 18 is provided in the middle of the second shear 20. The first shear 13 is rotatably engaged with the first pin sleeve 9 through the first rotating shaft 8, and the second shear 20 is rotatably engaged with the second pin sleeve 19 through the second rotating shaft 18. A reset assembly is provided between the rotating shaft and the pin sleeve, and the reset assembly is a leaf spring structure.

[0052] The first shears 13 and the second shears 20 are provided with cutting edges on the adjacent side. The first shears 13 and the second shears 20 rotate relative to the pin sleeve, so that the bottom of the shears rotates in opposite directions. The shears are located on the excavation side of the cutting plate 10, so as to cut off the soil adhering to the cutting plate 10 and ensure the excavation efficiency of the cutting plate.

[0053] As shown in Figures 1, 3, and 4, wedges 7 and 21 are provided on both sides of the steel frame 14 near the drive gear 5. Wedge 7 is corresponding to the first shear 13, and wedge 21 is corresponding to the second shear 20. The wedges are wedge block structures, and the outer surfaces of the two wedges that are far apart from each other are inclined surfaces, as shown in Figure 4.

[0054] As shown in Figure 3, the top of the first scissors 13 and the second scissors 20 are the first handle 11 and the second handle 17, respectively. The handles extend above the chain. The outer side of the wedge is inclined and corresponding to the handle. When the scissors pass the wedge under the drive of the chain, the inclined surface cooperates with the handle to push the scissors to rotate on the cutting surface of the cutting plate 10, thereby cutting off the debris and ensuring that no debris adheres to the cutting plate 10. After passing the wedge, the scissors are reset by the rebound force of the reset component.

[0055] As shown in Figure 3, the length of the cutting plate 10 is greater than the distance between the two sets of shears, and the bottom of the shears is higher than the bottom of the cutting plate, so that the cutting plate 10 protects the shears and prevents them from being damaged during excavation. When the cutting plate is a flat plate structure, the bottom of the shears can be flush with the bottom of the cutting plate 10.

[0056] The excavation mechanism in this embodiment can simultaneously excavate and clear silt using steel pipes and mud pumps. At the same time, the setting of wedges and shears ensures that no slag adheres to the cutting plate 10, thereby improving the excavation effect of the cutting plate.

[0057] Figure 5 shows the grouting process after the trench excavation is completed.

[0058] The trenches excavated during the construction of diaphragm walls are continuous trenches. Before pouring concrete, the continuous trenches need to be divided into multiple trench sections, and H-beams and nylon bags are used to form partitions, thus forming pouring chambers.

[0059] As shown in Figure 5, the H-beam 22 and the nylon bag 23 are detachably connected. The H-beam 22 is used to insert into the bottom of the trench in sections. The nylon bag has a corrugated shape. During grouting, the filled nylon bag works with the H-beam to form a concrete partition to eliminate grout leakage and runoff.

[0060] Because the nylon bag 23 has a corrugated shape, it increases the contact area with the concrete during subsequent pouring. Compared to the straight joint structure in existing technologies, the corrugated shape of the nylon bag 23 ensures a firm and stable joint at the bottom of the diaphragm wall after concrete pouring. The height of the nylon bag 23 is the same as the depth of the trench 4. The nylon bag is made of nylon filaments, allowing water to seep out, but preventing the fine aggregates (cement, sand) from seeping out.

[0061] The height of H-beam 22 is greater than the height of the trench 4. The bottom end of H-beam 22 is inserted into the bottom 16 of the trench, and the top end is fixed to the ground plane 3 by square steel 27. Nylon bags are hung on one side of H-beam. During pouring, slurry is first poured into nylon bags 23 to fill them completely. Together with H-beam, they provide a sealing effect to prevent slurry leakage or runoff during subsequent grouting of the pouring chamber.

[0062] Next, quick-setting concrete is poured into the nylon bag using underwater concrete pouring methods to form a concrete partition. After the concrete partition is completed, concrete can be poured into the trench section enclosed by the concrete partition. The concrete in the trench section is poured using underwater concrete pouring methods. After the concrete in the partition has initially set for a certain period of time, the H-beam is removed, and the next concrete partition and concrete trench section are constructed using the same method. This process is repeated to complete the construction of multiple underground wall sections, forming a continuous underground wall.

[0063] Example 2

[0064] A method for constructing a diaphragm wall, using a diaphragm wall construction system as described in Example 1, includes the following steps:

[0065] S1: Construction of the guide wall:

[0066] Before excavating the trench, a guide trench needs to be dug along the longitudinal axis of the underground wall, and reinforced concrete guide walls need to be constructed on both sides of the guide trench. The guide walls on both sides of the guide trench are inverted L-shaped, with a depth of 1.2-2 meters and a thickness of 0.15-0.25 meters. The distance between the two guide walls is 5 centimeters greater than the width of the underground wall. A wooden support is installed every 2 meters on the inner side of the guide wall.

[0067] S2: Mud preparation:

[0068] During trench excavation, mud slurry needs to be continuously injected into the trench to keep it full. The mud slurry is mixed using a mud mixer and is made by mixing bentonite and water. Additives such as sodium hydroxide and calcium sulfonate need to be added to the mud slurry.

[0069] The mixed mud slurry needs to be left to stand in the slurry storage tank for 24 hours. The specific gravity of the freshly prepared mud slurry should be controlled between 1.04 and 1.05, while the specific gravity of the mud slurry in the trench during excavation should be controlled below 1.25 to 1.30. In addition, the steel pipes in the excavation mechanism use mud pumps to extract large particles of mud during the excavation process, while small particles of mud slurry are returned to the trench through the sedimentation tank, where they, along with the prepared mud slurry, provide support.

[0070] S3: Trench excavation:

[0071] The excavation mechanism begins to work. Chain 6 rotates counterclockwise around the system consisting of drive gear 5, first driven gear 12, and second driven gear 15. The cutting plates on chain 6 excavate the excavated soil and push it out of the trench. When one cutting plate moves to the position of wedge 7 and wedge 21, the upper ends of the first cutter handle 11 and the second cutter handle 17 are squeezed by the inclined surface of the wedge, causing the cutter handle to move outward from the position of the chain. The shears then swing around the axis of rotation towards the middle position of the cutting plate. In this way, the first shears 13 and the second shears 20 cut the excavated soil on the cutting plate in a scissor shape.

[0072] When the first cutter handle 11 and the second cutter handle 17 pass over the wedges 7 and 21, the reset component on the shears returns the cutter handles and the shears to their original positions. When the second cutting plate moves to the position of the wedge, the above actions are repeated to ensure that no soil or debris adheres to the cutting plate. By repeating the above process, a trench is excavated.

[0073] While the underground wall is being excavated, the mud pumps are also working. The mud pumps in the mud pits draw mud from the mud pits, and the mud is transported to the bottom of the trench 4 through steel wire pipe 1 and steel pipe 2. The mud then carries the slag from the bottom of the trench into the sedimentation tank. After the slag settles in the sedimentation tank, the mud flows back into the mud pit. By repeating the above process, the large particles of slag at the bottom of the trench are cleaned up.

[0074] S4: Construction of concrete partitions:

[0075] As shown in Figure 5, the excavated trench is a continuous trench 4. Before pouring concrete, the continuous trench needs to be divided into multiple trench sections, each with a length of 4-8 meters.

[0076] Partitions are set at both ends of the trench section to form a pouring chamber. As shown in Figure 5, the left side is the already poured concrete 24, the right side is the H-beam 22 and the nylon bag 23, and a pouring chamber is formed in the middle.

[0077] The partition consists of an H-beam 22, a nylon bag 23 attached to the H-beam 22, and concrete inside the nylon bag.

[0078] The length of H-beam 22 is 2-3 meters longer than the depth of the groove. The width of H-beam 22 is the same as the width of groove 4. The height of the nylon bag is the same as the depth of the groove. Nylon bag 23 is a bag made of nylon filaments. Water can seep out of the nylon bag, but fine aggregates (cement, fine sand) cannot seep out of the nylon bag.

[0079] The construction process for concrete partitions is as follows:

[0080] First, place the conduit 25 into the nylon bag 23, hang one side of the nylon bag 23 on the H-beam 22, and vertically place the H-beam, nylon bag 23 and conduit 25 into the trench. Fix the upper and lower ends of the H-beam. The upper end of the H-beam is fixed to the upper surface of the concrete guide wall (at ground level 3) by two square steels 27. The lower end of the H-beam is inserted into the bottom of the trench 2-3 meters and fixed.

[0081] Then, the outlet of the mud pump is connected to the upper opening of the conduit 25 via a pipe, and mud is poured into the nylon bag 23. Once the nylon bag 23 is full of mud, the pipe at the upper opening of the conduit 25 is removed, and the concrete hopper 26 is connected to the upper opening of the conduit. Quick-setting concrete is then poured into the nylon bag using an underwater concrete pouring method through the conduit, forming a concrete partition. After the nylon bag 23 is filled with quick-setting concrete, the H-beams effectively seal the area, ensuring that there will be no leakage or runoff of grout during subsequent concrete pouring in the pouring chamber.

[0082] The width of the nylon bag 23 after being filled with concrete is greater than twice the width of the groove 4. The left and right sides of the nylon bag 23 are corrugated after being filled with concrete to increase the contact area with the concrete and improve the sealing at the joint with the concrete.

[0083] S5: Formation of underground walls:

[0084] After the concrete for the partition is poured, concrete can be poured into the trench section enclosed by the partition. Underwater concrete pouring is used to complete the pouring of the concrete within the trench section. After the concrete within the partition has initially set for a certain period, the H-beam is removed. The next concrete partition and concrete trench section are then constructed using the same method, sequentially completing the construction of multiple underground wall sections to form a continuous underground wall. During the removal of the H-beam, the nylon bag separates from the H-beam, remaining embedded in the concrete.

[0085] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A diaphragm wall construction system, characterized in that, include: The excavation mechanism includes a steel frame with a drive gear and a driven gear connected by a chain at both ends. Several cutting plates are mounted on the chain. A steel pipe is connected to the top of the steel frame, with its bottom extending to the outside of the driven gear and its top connected to a mud pump. The mud pump is located in a mud pit, which is connected to a sedimentation tank. The sedimentation tank is connected to a trench to achieve simultaneous excavation and dredging. The cutting plates are located at the bottom of the chain, and shears are rotatably connected to both sides of the bottom of the chain via a rotating shaft. The shears are located on the cutting side of the cutting plates, with the handles at the tips of the shears extending a set distance to the top of the chain. A reset component is located at the rotating shaft. Wedges are located on both sides of the bottom of the steel frame near the drive gear. The outer surfaces of the wedges are beveled and correspond to the handles, cooperating with the handles to push the shears to rotate on the cutting surface of the cutting plates, cutting away the excavated soil. An H-beam is detachably connected to a nylon bag on one side for segmented insertion into the bottom of the trench. The nylon bag is corrugated in shape, and when filled, it works with the H-beam to form a concrete partition to eliminate grout leakage.

2. The diaphragm wall construction system according to claim 1, characterized in that, The driven gear includes a first driven gear and a second driven gear. The driven gear is located at the bottom of the steel frame and the second driven gear is located directly above the first driven gear.

3. The diaphragm wall construction system according to claim 1, characterized in that, The length of the cutting plate is greater than the distance between the two sets of shears, and the bottom of the shears is flush with or higher than the bottom of the cutting plate.

4. The diaphragm wall construction system according to claim 1, characterized in that, The width of the nylon bag is greater than the width of the groove, and the height of the H-beam is greater than the height of the groove.

5. A method for constructing a diaphragm wall, characterized in that, The diaphragm wall construction system as described in any one of claims 1-4 includes the following steps: trench excavation; a chain rotating counterclockwise driven by a drive gear; a cutting plate continuously passing over a driven gear and excavating excavated soil; the cutting plate carrying the excavated soil passing over a wedge; the wedge pushing the shears to rotate and cut off the excavated soil on the cutting plate; the shears then being reset by a reset assembly; during excavation, a mud pump continuously pumps out mud; large mud particles are settled in a sedimentation tank and then returned to the trench for dredging; the trench is divided into multiple trench sections according to length; H-beams and nylon bags are constructed to form partitions in each trench section; mud is first injected into the nylon bags to fill them and then sealed; concrete is then poured into the nylon bags to form concrete partitions; concrete is then poured into the trench section enclosed by the concrete partitions; finally, the H-beams are removed; multiple trench sections are poured in sequence to form a diaphragm wall.

6. A method for constructing a diaphragm wall according to claim 5, characterized in that, Before excavating the trench, a guide trench needs to be excavated along the longitudinal axis of the underground wall. Reinforced concrete guide walls are built on both sides of the guide trench, and a wooden support is set every 2 meters on the inner side of the guide wall.

7. A method for constructing a diaphragm wall according to claim 6, characterized in that, During the trench excavation process, mud slurry needs to be continuously injected into the trench to keep it full of slurry.

8. A method for constructing a diaphragm wall according to claim 7, characterized in that, The top of the nylon bag is attached to the top of the H-beam. During the process of removing the H-beam, the nylon bag separates from the H-beam and remains in the concrete.

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