A diaphragm wall structure and its construction method

Abstract

This application discloses a diaphragm wall structure and its construction method, relating to the technical field of foundation engineering. It includes a reinforcing cage and a joint, with the joint located on opposite sides of the reinforcing cage. The joint includes a first diaphragm, a second diaphragm, a sealing plate, a driving assembly, and a sealing assembly. The first diaphragm abuts against the reinforcing cage, and its width is greater than the width of the reinforcing cage. The first diaphragms are symmetrically arranged and located at opposite ends of the second diaphragm. A vertically extending connecting cavity is formed on the side of the first diaphragm away from the second diaphragm. The sealing plate is hinged to the first diaphragm and located within the connecting cavity. The driving assembly is located on the first diaphragm and drives the sealing plate to rotate and abut against the wall of the connecting cavity. The sealing assembly is located on the first diaphragm, and when the sealing plate rotates outwards towards the connecting cavity, it seals the gap between the sealing plate and the cavity wall. This application can reduce the possibility of concrete seeping into the H-beam in the opposite direction.

Description

Technical Field

[0001] This application relates to the technical field of basic engineering, and in particular to a diaphragm wall structure and its construction method. Background Technology

[0002] Diaphragm walls, also known as underground walls, are retaining structures used in foundation and underground structural engineering. They can withstand significant lateral earth pressure and function as retaining walls. To reduce the possibility of collapse during foundation pit excavation, retaining structures are typically constructed before excavation, and diaphragm walls are a commonly used type of foundation pit retaining structure.

[0003] During the construction of diaphragm walls, a guide wall is typically first poured on the ground, followed by the excavation of trench sections and the pouring of concrete in sections to form the diaphragm walls. Because the diaphragm walls are poured in sections, joint structures are installed between adjacent sections to connect them and reduce the possibility of water seepage.

[0004] Among them, I-beam joints are widely used due to their advantages such as simple construction process and fast speed. When using I-beam structures, the I-beams are usually hoisted into the trench after the trench section is formed. The I-beams are matched in pairs, and the steel cage is placed between two adjacent I-beams.

[0005] However, because the width of the I-beam is smaller than the width of the trench section, the concrete will flow to the other side through the gap between the I-beam and the trench wall, resulting in concrete on the back of the I-beam. After a period of time, the concrete will float and solidify on the back of the I-beam to form a film. When concrete is poured for adjacent trench sections, the contact surface between the later poured concrete and the I-beam may not be firmly bonded, thus forming a seepage channel and causing water leakage at the joints of the diaphragm wall. Summary of the Invention

[0006] To reduce the possibility of concrete seeping into the I-beam from the opposite direction, this application provides a diaphragm wall structure and its construction method.

[0007] In the first aspect, this application provides a diaphragm wall structure, which adopts the following technical solution:

[0008] A type of underground continuous wall structure, including

[0009] A reinforcing cage and a joint, wherein the joint is located on opposite sides of the reinforcing cage;

[0010] The connector includes a first partition, a second partition, a sealing plate, a drive assembly, and a sealing assembly;

[0011] The second partition abuts against the reinforcing cage, and the width of the second partition is greater than the width of the reinforcing cage;

[0012] The first partition is symmetrically arranged and located at opposite ends of the second partition. A connecting cavity extending in the vertical direction is formed on the side of the first partition away from the second partition. The sealing plate is hinged to the first partition and located in the connecting cavity.

[0013] The driving component is disposed on the first partition plate, and the driving component drives the sealing plate to flip up to abut the groove wall of the groove section;

[0014] The sealing assembly is disposed on the first partition plate. When the sealing plate is flipped outward toward the connecting cavity, the sealing assembly seals the gap between the sealing plate and the cavity wall of the connecting cavity.

[0015] By adopting the above technical solution, during the construction of the underground wall, the joint is placed into the trench section, followed by the placement of the reinforcing cage between two adjacent joints. Then, the sealing plate is driven by a drive assembly, causing it to flip outwards towards the connecting cavity until the abutment plate abuts against the trench wall. During the flipping process, the sealing assembly seals the gap between the sealing plate and the connecting cavity wall. Afterwards, concrete is poured and allowed to solidify, completing the construction of one section of the underground wall. The remaining underground walls are then constructed using the same procedure until the diaphragm wall is completed. The entire process is simple, and a sealed structure is formed between the first partition plate and the trench wall, facilitating the placement of the joint into the trench while reducing the possibility of concrete leakage to the back of the joint.

[0016] Optionally, the drive assembly includes a drive column, a rotating shaft, a drive belt, a power column, a drive gear, a transmission gear, a transmission column, a drive rack, and a power gear.

[0017] The first partition has a drive groove communicating with the connecting cavity, and the drive column slides in the drive groove;

[0018] The rotating shaft is rotatably connected to the first partition and coaxially arranged with the drive column. The drive column is threadedly connected to the rotating shaft, and the drive gear is arranged on the outer circumference of the rotating shaft.

[0019] The first partition is provided with a limiting block, and a limiting groove extending axially from the limiting block is formed on the outer periphery of the drive column;

[0020] The first partition has a power groove located on the side away from the hinge point of the sealing plate, and the power column slides up and down in the power groove;

[0021] The power column is rotatably connected to the first partition and parallel to the rotating shaft; the power gear is rotatably connected to the first partition and is disposed on the outer periphery of the power column and protrudes into the power groove.

[0022] The drive rack is vertically disposed on the outer periphery of the power column, and the drive rack meshes with the power gear;

[0023] The transmission gear is rotatably connected to the first partition and disposed on the outer periphery of the power column; the drive belt is connected end to end and sleeved on the outer periphery of the drive gear and the transmission gear.

[0024] When the power column slides into the power groove, the drive column protrudes into the connecting cavity and pushes the sealing plate to flip outward from the connecting cavity.

[0025] By adopting the above technical solution, the power column is inserted into the power groove, and then the power is transmitted through the drive belt to make the rotating shaft rotate. At this time, the drive column slides out of the drive groove, pushing the sealing plate to flip out of the connecting cavity until it abuts the groove wall of the groove section, reducing the possibility of concrete leakage from the gap between the first partition and the groove wall of the groove section.

[0026] Optionally, the drive gear is rotatably connected to the rotating shaft;

[0027] The outer circumferential side of the rotating shaft has a mounting groove formed in the circumferential direction, and the mounting groove has support teeth evenly arranged in the circumferential direction. The inner circumferential sidewall of the drive gear is provided with sliding teeth.

[0028] When the power column slides into the power groove and the sealing plate flips outward toward the connecting cavity, the sliding tooth abuts against the support tooth and drives the rotating shaft to rotate.

[0029] When the power column slides into the power groove and the sealing plate stops flipping, the sliding tooth slides on the support tooth.

[0030] By adopting the above technical solution, when the sealing plate abuts against the tank wall, as the power column continues to slide into the power tank, the sliding teeth slide against the supporting teeth, allowing the power column to continue sliding into the power tank. This is beneficial for the sealing plate to adapt to different sizes of gaps between the partition and the tank wall.

[0031] Optionally, the first partition is rotatably connected to a connecting shaft located within the connecting cavity, and the sealing plate is disposed on the connecting shaft;

[0032] A torsion spring is fitted on the outer circumference of the rotating shaft, and the torsion spring drives the sealing plate to flip into the connecting cavity.

[0033] By adopting the above technical solution, the torsion spring pushes the sealing plate to flip into the connection cavity, reducing the possibility of the first partition plate hitting the groove wall during the process of being placed into the groove, and making it easier to put the joint into the groove.

[0034] Optionally, the end of the sealing plate away from the connecting shaft is provided with an arc-shaped abutment plate, the arc-shaped concave side of the abutment plate facing the opening of the connecting cavity, and the abutment plate is inserted into the groove wall of the groove segment.

[0035] By adopting the above technical solution, the abutment plate is inserted into the groove wall of the groove section, thereby improving the sealing effect between the sealing plate and the groove wall of the groove section.

[0036] Optionally, the first partition has a fixing groove symmetrically arranged with the power groove, and the connecting cavity is located between the power groove and the fixing groove;

[0037] The first partition is provided with a fixed column that slides up and down in the fixed groove, and a fixed rope is provided between the fixed column and the power column. The first partition is formed with a sliding hole for the fixed rope to slide up and down.

[0038] By adopting the above technical solution, adjacent joints are connected by fixed ropes, reducing the possibility that the joints will be far apart during concrete pouring and thus affect the quality of the underground wall.

[0039] Optionally, the sealing assembly includes a sealing plate, a sealing block, a slider, and a push spring;

[0040] The sealing plate is disposed on the side of the sealing plate away from the abutment plate;

[0041] The slider slides on the cavity wall away from the cavity opening of the connecting cavity, the sealing block is disposed on the slider, the push spring is disposed on the first partition plate, and the push spring pushes the slider away from the sealing plate;

[0042] When the sealing plate flips outward toward the connecting cavity, the sealing plate abuts against the sealing block and pushes the slider to squeeze the push spring.

[0043] By adopting the above technical solution, during the process of the sealing plate flipping, the sealing plate abuts against the sealing block, reducing the possibility of concrete leakage between the sealing plate and the cavity wall.

[0044] Secondly, this application provides a construction method for a diaphragm wall structure, employing the following technical solution:

[0045] A construction method for a diaphragm wall structure includes the following steps:

[0046] S1: Guide wall pouring;

[0047] S2: Trench excavation;

[0048] S3: Place the two joints at both ends of the trench section, with the two joints set symmetrically. Then place the steel cage between the two joints, drive the sealing plate to flip outward to abut against the trench section and the sealing component to achieve a seal, and then pour concrete.

[0049] S4: After the previous underground wall has solidified, the construction of subsequent underground wall sections continues, and the joints of the next adjacent underground wall section are arranged in an array with the joints of the previous adjacent underground wall section.

[0050] By adopting the above technical solutions, the possibility of concrete leakage can be reduced by using sealing plates during the construction of underground walls. At the same time, by adjusting the placement of joints, the possibility of adjacent joints moving away from each other during the concrete pouring process can be reduced.

[0051] In summary, this application includes at least one of the following beneficial effects:

[0052] 1. Place the joint and the reinforcing cage into the trench section, then drive the sealing plate to flip up to the trench wall of the trench section through the drive component, and seal the gap between the sealing plate and the connecting cavity through the sealing component to reduce the possibility of leakage to the back of the joint during concrete pouring.

[0053] 2. Adjacent joints are connected by fixing ropes to reduce the possibility of joints moving away from each other during concrete pouring. Attached Figure Description

[0054] Figure 1 This is a schematic diagram of the steel cage and joint after installation in an embodiment of this application;

[0055] Figure 2 This is a schematic diagram of the connection between the reinforcing cage and the joint in an embodiment of this application;

[0056] Figure 3 This is a cross-sectional schematic diagram of the connection between the reinforcing cage and the joint in an embodiment of this application;

[0057] Figure 4 yes Figure 3 Enlarged schematic diagram of part A;

[0058] Figure 5 yes Figure 3 Enlarged schematic diagram of part B;

[0059] Figure 6 This is a schematic diagram of the internal cross-section of the first partition in an embodiment of this application;

[0060] Figure 7 yes Figure 6 Enlarged schematic diagram of part C.

[0061] Reference numerals: 1. Reinforcing cage; 2. First partition plate; 21. Connecting cavity; 211. Moving groove; 22. Driving groove; 23. Restricting block; 24. Power groove; 25. Fixing groove; 26. Fixing column; 27. Connecting shaft; 271. Support plate; 28. Torsion spring; 29. ​​Sliding hole; 3. Second partition plate; 4. Sealing plate; 41. Abutting plate; 5. Sealing assembly; 51. Sealing plate; 52. Sealing block; 53. Sliding block; 54. Push spring; 6. Driving belt; 61. Rotating shaft; 611. Mounting groove; 612. Rotating hole; 613. Support tooth; 62. Driving column; 621. Restricting groove; 63. Power column; 64. Driving gear; 641. Sliding tooth; 65. Transmission gear; 66. Transmission column; 67. Driving rack; 68. Power gear; 7. Fixing rope. Detailed Implementation

[0062] The following is in conjunction with the appendix Figure 1-7 This application will be described in further detail.

[0063] This application discloses an underground continuous wall structure. See also... Figure 1 and Figure 2 The diaphragm wall structure includes a reinforcing cage 1 and joints. Each section of the diaphragm wall has one reinforcing cage 1 and two joints, and the next section of the diaphragm wall shares the same joint with the adjacent section above. The joints and reinforcing cage 1 are placed in the trench section, with the reinforcing cage 1 located between two adjacent joints. The reinforcing cage 1 is composed of horizontally, vertically, and longitudinally connected reinforcing bars. After the joints and reinforcing cage 1 are placed, concrete is poured into the trench section, and the construction of one section of the diaphragm wall is completed after the concrete has solidified.

[0064] The joint includes a first partition 2 and a second partition 3, both of which are rectangular plate structures. There are two first partitions 2, each fixed to opposite ends of the second partition 3. The length directions of the first partitions 2 and 3 are parallel, and their width directions are perpendicular, forming an "I"-shaped structure. After the reinforcing cage 1 and the joint are placed into the trench section, the reinforcing cage 1 abuts against the second partition 3. There are certain gaps between the two first partitions 2 and the trench wall to facilitate the placement of the first partitions 2 into the trench section.

[0065] See Figure 3 and Figure 4The first partition 2 has a connecting cavity 21 formed at its end facing away from the second partition 3, and the connecting cavity 21 extends vertically through both ends of the first partition 2. The connector also includes a sealing plate 4 and a driving assembly. Support plates 271 are symmetrically fixed to the top and bottom of the first partition 2, and the support plates 271 are located on the cavity wall of the connecting cavity 21 near the second partition 3. A connecting shaft 27 is rotatably connected to the support plate 271, and the central axis of the connecting shaft 27 extends parallel to the length direction of the first partition 2. The length of the connecting shaft 27 is greater than the length of the first partition 2, and the top of the connecting shaft 27 protrudes outside the connecting cavity 21. The sealing plate 4 is rotatably connected to the connecting shaft 27, and the length of the sealing plate 4 is equal to the length of the first partition 2.

[0066] See Figure 2 and Figure 4 A torsion spring 28 is sleeved on the outer periphery of the top of the connecting shaft 27. One end of the torsion spring 28 abuts against the sealing plate 4, and the other end abuts against the first partition plate 2. When the torsion spring 28 is released elastically, it drives the sealing plate 4 to flip into the connecting cavity 21, reducing the possibility of contact between the sealing plate 4 and the groove wall when the connector is placed into the groove.

[0067] See Figure 3 and Figure 4 A stop plate 41 is fixedly connected to the end of the sealing plate 4 away from the connecting shaft 27. The stop plate 41 has an arc-shaped plate structure, and its length is equal to that of the sealing plate 4. In the initial state, the stop plate 41 and the sealing plate 4 are located inside the connecting cavity 21, with the arc-shaped concave side of the stop plate 41 facing away from the second partition 3. The driving assembly is located on the first partition 2. After the joint is placed, the driving assembly drives the sealing plate 4 to flip outside the connecting cavity 21, so that the end of the stop plate 41 abuts against or inserts into the groove wall of the groove segment. At this time, a sealing structure is formed between the first partition 2 and the groove wall of the groove segment, reducing the possibility of concrete leakage.

[0068] See Figure 4 and Figure 5 The drive assembly includes a drive column 62, a rotating shaft 61, a drive belt 6, a power column 63, a drive gear 64, a transmission gear 65, a transmission column 66, a drive rack 67, and a power gear 68.

[0069] A driving groove 22 is formed within the first partition 2. The extending direction of the driving groove 22 is perpendicular to the length direction of the first partition 2. The opening of the driving groove 22 is located on the side wall of the connecting cavity 21 near the second partition 3 and close to the support plate 271. The driving post 62 is a cylindrical structure and is slidably disposed within the driving groove 22. When the driving post 62 protrudes into the connecting cavity 21, it pushes the sealing plate 4 outward from the connecting cavity 21.

[0070] A rotating shaft 61 is rotatably mounted within the first partition 2. The rotating shaft 61 is coaxially mounted with the drive column 62. A rotating hole 612 is formed in the middle of the rotating shaft 61, through which the drive column 62 passes. The outer periphery of the drive column 62 is threadedly connected to the wall of the rotating hole 612. A limiting block 23 is fixedly connected to the wall of the drive groove 22. A limiting groove 621 extending along the length direction is formed on the outer periphery of the drive column 62, and the limiting block 23 slides within the limiting groove 621. When the rotating shaft 61 rotates, it drives the drive column 62 to move along its length.

[0071] A drive gear 64 rotates on the first partition 2 and is located on the outer periphery of the rotating shaft 61. A power groove 24, extending vertically from the top of the first partition 2 to the outside, is formed on the first partition 2 away from the connecting shaft 27. A transmission column 66 is rotatably connected within the first partition 2 and is positioned close to the power groove 24. The transmission column 66 is parallel to the rotating shaft 61. A drive gear 68 and a transmission gear 65 are respectively fixed to the outer periphery of the transmission column 66, and are rotatably connected to the first partition 2. The drive gear 68 partially protrudes into the power groove 24, and the transmission gear 65 corresponds to the drive gear 64. A drive belt 6 is connected end-to-end and slidably passes through the first partition 2, and is fitted around the outer periphery of the drive gear 64 and the transmission gear 65.

[0072] The power column 63 slides up and down in the power groove 24. A receiving groove extending along the length direction is formed on the outer periphery of the power column 63. The drive rack 67 is fixed to the power column 63 and located in the receiving groove. After the drive rack 67 is aligned with the power gear 68, the power column 63 is slid into the power groove 24. At this time, the drive rack 67 meshes with the power gear 68, driving the transmission column 66 to rotate. Then, the power is transmitted through the drive belt 6, causing the rotating shaft 61 to rotate, driving the drive column 62 to slide out of the drive groove 22, and pushing the sealing plate 4 to flip outward toward the connecting cavity 21.

[0073] See Figure 6 and and Figure 7 To accommodate different spacings between the first partition 2 and the groove wall, a rotating shaft 61 is rotatably connected to a drive gear 64. A mounting groove 611 is formed circumferentially on the outer periphery of the rotating shaft 61. Support teeth 613 are fixedly connected to the rotating shaft 61, located within the mounting groove 611, and are evenly distributed circumferentially. Sliding teeth 641 are fixedly connected to the inner periphery of the drive gear 64, meshing with the support teeth 613.

[0074] See Figure 3 and Figure 5 When the drive gear 64 rotates, it drives the rotating shaft 61 to rotate, causing the drive column 62 to move toward the connecting cavity 21. The sliding teeth 641 (the sliding teeth 641 in...) Figure 7(Winning bid) First, it abuts against the support tooth 613 (support tooth 613 is in) Figure 7 (The power of the drive gear 64 can be transmitted to the rotating shaft 61) until the abutment plate 41 abuts the groove wall of the groove section, the rotation of the sealing plate 4 is restricted, the drive column 62 stops sliding towards the connecting cavity 21, at this time the sliding tooth 641 slides on the support tooth 613, so that the drive gear 64 enters the free-running state, and the power column 63 can continue to slide into the power groove 24.

[0075] See Figure 4 and Figure 5 To reduce the compressive stress of concrete on the joint during concrete pouring, the joint is moved away from the reinforcing cage 1 (reinforcing cage 1 is in...). Figure 3 (As indicated by the bid), the first partition 2 forms a fixing groove 25 symmetrical to the power groove 24, and the connecting cavity 21 is located between the power groove 24 and the fixing groove 25. The first partition 2 is provided with a fixing post 26 (the fixing post 26 is located in...). Figure 3 (As indicated by the mark), the fixed column 26 slides up and down in the fixed groove 25. A fixing rope 7 is fixedly connected between the power column 63 and the adjacent fixed column 26. Multiple fixing ropes 7 are arranged at intervals. A sliding hole 29 is formed on the side wall of the first partition 2 facing the other joint. The sliding hole 29 communicates with the fixed groove 25 and the power groove 24 respectively. When the fixed column 26 and the power column 63 are installed, the fixing rope 7 slides up and down within the sliding hole 29. When the joints are pushed apart by the pressure generated during concrete pouring, the fixing rope 7 pulls the power column 63 and the fixed column 26 to maintain the distance between the two joints.

[0076] See Figure 3 and Figure 4The connector also includes a sealing assembly 5, which includes a sealing plate 51, a sealing block 52, a slider 53, and a push spring 54. The first partition 2 forms a "T"-shaped moving groove 211, which is located on the side of the connecting cavity 21 near the second partition 3 and close to the connecting shaft 27. The slider 53 slides along the width of the first partition 2 in the moving groove 211. The sealing block 52 is fixed on the side of the slider 53 facing away from the second partition 3, and the length of the sealing block 52 is equal to the length of the first partition 2. The push spring 54 is installed in the moving groove 211, with one end abutting against the slider 53 and the other end abutting against the groove wall of the moving groove 211. In the initial state, the push spring 54 is elastically released, pushing the slider 53 to slide towards the fixed groove 25 until the slider 53 abuts against the groove wall of the moving groove 211. The sealing plate 51 is fixed on the side of the sealing plate 4 away from the abutting plate 41, and the sealing plate 51 extends vertically and has a length equal to the length of the first partition 2. When the sealing plate 4 flips outward toward the connecting cavity 21, the sealing plate 51 flips toward the sealing block 52. Then, the sealing plate 51 first abuts against the side of the sealing block 52 near the fixing groove 25. Then, as the sealing plate 4 continues to flip, the sealing block 52 pushes the slider 53 to slide away from the fixing groove 25. At this time, the sealing block 52 and the sealing plate 51 abut against each other to form a sealing structure, reducing the possibility of concrete leakage from the gap between the sealing plate 4 away from the abutting plate 41 and the cavity wall of the connecting cavity 21.

[0077] The implementation principle of a diaphragm wall structure in this application is as follows:

[0078] During the construction of the underground wall, the joint is placed into the trench section, followed by the placement of the reinforcing cage 1 between two adjacent joints. Then, the fixing column 26 and the power column 63 are installed, causing the sealing plate 4 to rotate outwards towards the connecting cavity 21 until the abutment plate 41 abuts against the trench wall and the sealing plate 51 abuts against the sealing block 52. Concrete is then poured and allowed to solidify, completing the construction of one end of the underground wall. The remaining underground walls are constructed using the same procedure until the diaphragm wall is completed.

[0079] On the other hand, this application discloses a construction method for a diaphragm wall structure, including the following steps:

[0080] Step 1: Casting of the guide wall;

[0081] Step 2: Excavate trench sections between the guide walls. The excavation length of each trench section is determined based on the length of a single underground wall section.

[0082] Step 3: Place the two joints at both ends of the trench section, symmetrically arranged. At this point, the sealing plates 4 on the same side of the two joints abut against the trench section and form an "eight" shape, while the sealing components 5 form a seal. Next, place the reinforcing cage 1 between the two joints and pour concrete. The concrete pouring creates a force acting in all directions. At this point, the two joints are not only reinforced and stabilized by the fixing ropes 7, but also secured by the abutment plates 41 inserted into the trench wall, creating a gripping force that prevents the joints from moving away from the reinforcing cage 1.

[0083] Step 4: After the previous underground wall has solidified, construction continues on the subsequent underground wall sections. The joints of the next adjacent underground wall section are arranged in an array with the joints of the previous adjacent underground wall section. At this point, the joints between the solidified previous underground wall section and the next adjacent underground wall section to be poured are fixed. During concrete pouring, the unfixed joints of the underground wall also generate a force through the abutment plate 41 to restrict the joints from moving away from the reinforcing cage 1, reducing the possibility of the joints moving away from the reinforcing cage 1 during concrete pouring and affecting the quality of the underground wall. Then, the remaining underground walls are constructed in the same way until all the underground wall sections form a continuous underground wall structure enclosing the foundation pit.

[0084] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A diaphragm wall structure, characterized in that: include A reinforcing cage (1) and a joint, wherein the joint is disposed on opposite sides of the reinforcing cage (1); The connector includes a first partition (2), a second partition (3), a sealing plate (4), a drive assembly, and a sealing assembly (5); The second partition (3) abuts against the steel cage (1), and the width of the second partition (3) is greater than the width of the steel cage (1); The first partition (2) is symmetrically arranged and located at opposite ends of the second partition (3). A connecting cavity (21) extending in the vertical direction is formed on the side of the first partition (2) away from the second partition (3). The sealing plate (4) is hinged to the first partition (2) and located in the connecting cavity (21). The driving component is disposed on the first partition (2), and the driving component drives the sealing plate (4) to flip to the groove wall of the abutting groove section; The sealing assembly (5) is disposed on the first partition (2). When the sealing plate (4) is flipped outward toward the connecting cavity (21), the sealing assembly (5) seals the gap between the sealing plate (4) and the cavity wall of the connecting cavity (21). The drive assembly includes a drive column (62), a rotating shaft (61), a drive belt (6), a power column (63), a drive gear (64), a transmission gear (65), a transmission column (66), a drive rack (67), and a power gear (68). The first partition (2) has a drive groove (22) communicating with the connecting cavity (21), and the drive column (62) is slidably disposed in the drive groove (22); The rotating shaft (61) is rotatably connected to the first partition (2) and coaxially arranged with the drive column (62). The drive column (62) is threadedly connected to the rotating shaft (61). The drive gear (64) is arranged on the outer periphery of the rotating shaft (61). The first partition (2) is provided with a limiting block (23), and the outer periphery of the drive column (62) is formed with a limiting groove (621) extending axially along the limiting block (23). The first partition (2) has a power groove (24) located on the side away from the hinge point of the sealing plate (4), and the power column (63) slides up and down in the power groove (24). The transmission column (66) is rotatably connected to the first partition (2) and parallel to the rotating shaft (61). The power gear (68) is rotatably connected to the first partition (2). The power gear (68) is located on the outer periphery of the transmission column (66) and protrudes into the power groove (24). The drive rack (67) is arranged vertically on the outer periphery of the power column (63), and the drive rack (67) meshes with the power gear (68); The transmission gear (65) is rotatably connected to the first partition (2) and disposed on the outer periphery of the transmission column (66). The drive belt (6) is connected end to end and sleeved on the outer periphery of the drive gear (64) and the transmission gear (65). When the power column (63) slides into the power groove (24), the drive column (62) protrudes into the connecting cavity (21) and pushes the sealing plate (4) to flip outward from the connecting cavity (21); The drive gear (64) is rotatably connected to the rotating shaft (61); The rotating shaft (61) has a mounting groove (611) formed circumferentially on its outer periphery, and support teeth (613) are evenly arranged circumferentially inside the mounting groove (611). The drive gear (64) has sliding teeth (641) on its inner periphery sidewall. When the power column (63) slides into the power groove (24) and the sealing plate (4) flips outward toward the connecting cavity (21), the sliding tooth (641) abuts against the support tooth (613) and drives the rotating shaft (61) to rotate. When the power column (63) slides into the power groove (24) and the sealing plate (4) stops flipping, the sliding tooth (641) slides on the support tooth (613). The first partition (2) is formed with The power groove (24) is symmetrically arranged with the fixing groove (25), and the connecting cavity (21) is located between the power groove (24) and the fixing groove (25); The first partition (2) is provided with a fixed post (26) that slides up and down in the fixed groove (25). A fixed rope (7) is provided between the fixed post (26) and the power post (63). The first partition (2) is formed with a sliding hole (29) for the fixed rope (7) to slide up and down.

2. The underground continuous wall structure according to claim 1, characterized in that: The first partition (2) is rotatably connected to a connecting shaft (27) located in the connecting cavity (21), and the sealing plate (4) is disposed on the connecting shaft (27). A torsion spring (28) is sleeved on the outer periphery of the connecting shaft (27), and the torsion spring (28) drives the sealing plate (4) to flip into the connecting cavity (21).

3. The underground continuous wall structure according to claim 2, characterized in that: The sealing plate (4) is provided with an arc-shaped abutment plate (41) at one end away from the connecting shaft (27). The arc-shaped concave side of the abutment plate (41) faces the opening of the connecting cavity (21), and the abutment plate (41) is inserted into the groove wall of the groove section.

4. A diaphragm wall structure according to claim 3, characterized in that: The sealing assembly (5) includes a sealing plate (51), a sealing block (52), a slider (53), and a push spring (54); The sealing plate (51) is disposed on the side of the sealing plate (4) away from the abutment plate (41); The slider (53) slides on the cavity wall away from the cavity opening of the connecting cavity (21), the sealing block (52) is disposed on the slider (53), the pushing spring (54) is disposed on the first partition (2), and the pushing spring (54) pushes the slider (53) away from the sealing plate (4). When the sealing plate (4) is flipped outward toward the connecting cavity (21), the sealing plate (51) abuts against the sealing block (52) and pushes the slider (53) to squeeze the push spring (54).

5. A construction method for a diaphragm wall structure, employing a diaphragm wall structure as described in any one of claims 1-4, characterized in that, Includes the following steps: S1: Guide wall pouring; S2: Trench excavation; S3: Place the two joints at both ends of the trench section, with the two joints set symmetrically. Then place the steel cage (1) between the two joints, drive the sealing plate (4) to turn outward to abut against the trench section and achieve sealing through the sealing component (5), and pour concrete. S4: After the previous underground wall has solidified, the construction of subsequent underground wall sections continues, and the joints of the next adjacent underground wall section are arranged in an array with the joints of the previous adjacent underground wall section.

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