Protective structure of deep foundation pit support and disassembly and assembly method

Abstract

The invention belongs to the technical field of foundation pit supporting, and particularly relates to a protective structure for deep foundation pit supporting and a dismounting and mounting method, the protective structure comprises a foundation pit surface, a plurality of steel sheet piles are mounted on the foundation pit surface, and a horizontal steel plate is arranged on one side of each steel sheet pile; a base is installed on the face, away from the foundation pit face, of the steel sheet pile through bolts, the base is in an L shape, a plurality of grooves are formed in the top of the base, rolling balls are movably connected into the grooves, and a positioning plate is arranged on the base. By means of the designed structure, the effect of rapidly installing the horizontal steel plate is achieved, the installation difficulty of the horizontal steel plate is greatly reduced, the installation efficiency of the horizontal steel plate is improved, and meanwhile the horizontal steel plates of different sizes can be installed through the designed positioning plate. And by designing the rolling balls, the effect of assisting in fine adjustment of the horizontal steel plate can be achieved, so that the horizontal steel plate is rapidly moved to a proper position to be welded and fixed, and the effect of supporting the deep foundation pit is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit support, in particular to a protective structure for deep foundation pit support and a disassembly and assembly method. Background Art

[0002] Steel plates are often used in deep foundation pit protection. Common types of steel plates include steel sheet piles and horizontal steel plates. Steel sheet piles are hot-rolled steel sections with locking (or clamping) joints. They come in various cross-sectional shapes (such as U-shaped, Z-shaped, and straight). They are connected together through locking joints to form a continuous steel sheet pile wall, which is used for foundation pit support, soil retaining, and water retention. When using steel sheet piles and horizontal steel plates for support, several vertical steel sheet piles are installed first. Once the steel sheet piles are installed, the horizontal steel plates are then installed, securing the vertical steel sheet piles with the horizontal steel plates.

[0003] Since the foundation pit has several surfaces, and the horizontal steel plates on these surfaces need to be aligned and welded, it is difficult to quickly and effectively adjust the traditional horizontal steel plates after they are placed. They can only be adjusted continuously with a hoist before alignment and welding. This makes the operation difficult and inefficient.

[0004] To this end, the present invention provides a protective structure for deep foundation pit support and a disassembly and assembly method. Summary of the Invention

[0005] In order to make up for the deficiencies of the prior art, at least one technical problem raised in the background technology is solved.

[0006] The technical solution adopted by the present invention to solve its technical problems is: a protective structure for deep foundation pit support described in the present invention includes a foundation pit surface, a plurality of steel sheet piles are installed on the foundation pit surface, and a horizontal steel plate is provided on one side of the plurality of steel sheet piles; a base is installed on the side of the steel sheet pile away from the foundation pit surface through bolts, and the base is "L"-shaped, and a plurality of grooves are opened on the top of the base, and rolling balls are movably connected inside the grooves, and a positioning plate is provided on the base; the horizontal steel plate is on the base, and the horizontal steel plate is between the steel sheet pile and the positioning plate.

[0007] Furthermore, a guide plate is fixedly installed on the top of the positioning plate, one side of the guide plate is arc-shaped, and a plurality of receiving grooves are opened on the arc-shaped surface of the guide plate. A guide column made of a flexible material is rotatably connected in the receiving groove.

[0008] Furthermore, a slide groove is provided on the top of the base, and the positioning plate slides in the slide groove. A plurality of positioning holes connected to the interior of the slide groove are provided on one side of the base. A positioning rod is provided on one side of the base, and the positioning rod passes through the positioning hole and is inserted into the positioning plate.

[0009] Furthermore, a rectangular groove is provided on one side of the positioning plate, a sliding plate is slidably connected to the inside of the rectangular groove, one side of the sliding plate protrudes from the rectangular groove, a plurality of elastic parts are fixedly installed in the rectangular groove, one side of the elastic part is fixedly connected to the sliding plate, the elastic part is a hollow elastic ball, a shrinkage hole is provided on the surface of the elastic part, a conduit is fixedly installed on one side of the positioning plate, and the conduit is internally connected to the plurality of elastic parts; a fixed block is fixedly installed on one side of the positioning plate, a placement groove is provided inside the fixed block and the positioning plate, a sealing plate is sealingly and slidably connected to the inside of the placement groove, a connecting rod is fixedly installed on one side of the sealing plate, a push plate is fixedly installed on the side of the connecting rod away from the sealing plate, and a side of the conduit away from the elastic part is connected to the inside of the placement groove.

[0010] Furthermore, a side of the sliding plate protruding from the rectangular groove is arc-shaped, and a plurality of rolling columns are rotatably connected to the arc-shaped surface of the sliding plate.

[0011] Furthermore, a triangular cleaning plate is fixedly mounted on a side of the push plate away from the connecting rod, and a brush is fixedly mounted on the inclined surface of the cleaning plate.

[0012] Furthermore, a baffle is fixedly installed in the placement groove, and a buffer pad made of a flexible material is fixedly installed on one side of the baffle.

[0013] A protective structure for deep foundation pit support and a disassembly and assembly method thereof, the method using the above-mentioned protective structure for deep foundation pit support, the method comprising the following steps: S1: Insert several steel sheet piles into the deep foundation pit so that the steel sheet piles fit the foundation pit surface. Slide the positioning plate in the base chute to change the gap between the positioning plate and the steel sheet piles, thereby adapting to horizontal steel plates of different sizes. S2: When the positioning plate is adjusted to the appropriate position, stop it and insert the positioning rod through the positioning hole into the positioning plate to fix it in place. Then use the lifting device to move the horizontal steel plate to be welded above the base and slowly lower it to the base. Then weld the steel sheet pile to the horizontal steel plate. S3: After the deep foundation pit operation is completed, the steel sheet piles and horizontal steel plates are separated by cutting the horizontal steel plates and setting up a protective shed underneath.

[0014] The beneficial effects of the present invention are as follows: 1. The present invention relates to a protective structure and disassembly method for deep foundation pit support. Several steel sheet piles are inserted into the deep foundation pit so that the steel sheet piles fit the foundation pit surface. A positioning plate is slid into the base chute to change the gap between the positioning plate and the steel sheet piles, thereby adapting to horizontal steel plates of different sizes for welding and installation. When the positioning plate is slid to the appropriate position, it stops, and a positioning rod is inserted through the positioning hole into the positioning plate to limit and fix it. The horizontal steel plate to be welded is then moved above the base using a sling and slowly lowered toward the base. The curved surface of the guide plate and several guide posts on the positioning plate guide the inserted horizontal steel plate, allowing it to be quickly inserted into the gap between the horizontal steel plate and the steel sheet piles. The guide posts also assist in guiding movement. Once the horizontal steel plate is placed on the base, the plate is pushed and fine-tuned to position it in the appropriate position. The rolling balls on the base reduce friction, facilitating movement of the horizontal steel plate. After the horizontal steel plates are installed, workers weld the steel sheet piles to the horizontal steel plates, providing support and protection for the deep foundation pit. The designed structure allows for rapid installation of the horizontal steel plates, significantly reducing installation difficulty and improving efficiency. The positioning plates also accommodate installation of horizontal steel plates of varying sizes. The rolling ball design aids in fine-tuning the horizontal steel plates, allowing them to be quickly moved to the appropriate position for welding and securing, thus supporting the deep foundation pit.

[0015] 2. The present invention relates to a protective structure and disassembly method for deep foundation pit support. When a horizontal steel plate is guided between the steel sheet piles and the positioning plate by a guide plate and guide posts, it moves downward and contacts the curved surface of the sliding plate and several rolling posts. The rolling posts compress the sliding plate, causing it to slide and contract within the rectangular groove, thereby squeezing the elastic member within the groove. After being squeezed, gas within the elastic member enters the conduit through the shrinkage hole, where it then enters the placement groove. This gas pushes the sealing plate within the placement groove, causing it to slide away from the placement groove along with the push plate and cleaning plate via a connecting rod. The triangular cleaning plate removes impurities from the base surface and simultaneously cleans the base surface with a brush. Baffles and cushions are installed to prevent the sealing plate from sliding excessively out of the placement groove. As the horizontal steel plate continues to move downward and no longer compresses the sliding plate, the elastic member is no longer subject to the compressive force and returns to its original state. The gas in the placement groove flows back into the corresponding elastic member through the conduit. At the same time, the sealing plate, through the connecting rod, pulls the push plate and cleaning plate back to their original position, thus not affecting the placement of the horizontal steel plate on the base. This designed structure pre-cleans the area of ​​the base where the horizontal steel plate is placed, thereby reducing the impact of impurities on the horizontal steel plate during placement, allowing the horizontal steel plate to remain horizontal, which is more conducive to subsequent welding work. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings.

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the horizontal steel plate in the present invention; Figure 2 It is a structural diagram of the steel sheet pile in the present invention; Figure 3 It is a structural schematic diagram of the base in the present invention; Figure 4 It is a schematic cross-sectional structural diagram of the positioning plate in the present invention; Figure 5 In the present invention Figure 4 Schematic diagram of the structure at A; Figure 6 It is a schematic flow diagram of the method of the present invention.

[0018] In the figure: 1. foundation pit surface; 2. steel sheet pile; 3. horizontal steel plate; 4. base; 5. bolt; 6. groove; 7. rolling ball; 8. positioning plate; 9. guide plate; 10. storage groove; 11. guide column; 12. slide groove; 13. positioning hole; 14. positioning rod; 15. rectangular groove; 16. sliding plate; 17. elastic member; 18. conduit; 19. placement groove; 20. sealing plate; 21. connecting rod; 22. push plate; 23. rolling column; 24. cleaning plate; 25. baffle; 26. buffer pad; 27. fixing block. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] like Figures 1 to 6 As shown, a protective structure for deep foundation pit support described in an embodiment of the present invention includes a foundation pit surface 1, a plurality of steel sheet piles 2 are installed on the foundation pit surface 1, and a horizontal steel plate 3 is provided on one side of the plurality of steel sheet piles 2; a base 4 is installed on the side of the steel sheet piles 2 away from the foundation pit surface 1 through bolts 5, and the base 4 is "L"-shaped, and a plurality of grooves 6 are opened on the top of the base 4, and a rolling ball 7 is movably connected inside the groove 6, and a positioning plate 8 is provided on the base 4; the horizontal steel plate 3 is on the base 4, and the horizontal steel plate 3 is between the steel sheet piles 2 and the positioning plate 8.

[0021] Specifically, a guide plate 9 is fixedly mounted on the top of the positioning plate 8. One side of the guide plate 9 is curved, and a plurality of receiving slots 10 are provided on the curved surface of the guide plate 9. A guide post 11 made of a flexible material is rotatably connected within the receiving slots 10. A slide slot 12 is provided on the top of the base 4, and the positioning plate 8 slides within the slide slot 12. A plurality of positioning holes 13 are provided on one side of the base 4, which are connected to the interior of the slide slot 12. A positioning rod 14 is provided on one side of the base 4, and the positioning rod 14 passes through the positioning hole 13 and is inserted into the positioning plate 8.

[0022] During operation, several steel sheet piles 2 are inserted into the deep foundation pit so that the steel sheet piles 2 fit the foundation pit surface 1. The positioning plate 8 in the sliding groove 12 of the sliding base 4 is used to change the gap between the positioning plate 8 and the steel sheet piles 2, thereby adapting to horizontal steel plates 3 of different sizes for welding and installation. When the positioning plate 8 is slid to the appropriate position, it stops and the positioning rod 14 is inserted into the positioning plate 8 through the positioning hole 13 to limit and fix it. At this time, the horizontal steel plate 3 to be welded is adjusted to the top of the base 4 using a sling and slowly lowered toward the base 4. The curved surface of the guide plate 9 on the positioning plate 8 and several guide columns 11 guide the inserted horizontal steel plate 3, so that the horizontal steel plate 3 can be quickly inserted into the gap between the horizontal steel plate 3 and the steel sheet pile 2, and the guide columns 11 can play a role in assisting the guiding movement. After the horizontal steel plate 3 is placed on the base 4, the horizontal steel plate 3 is fine-tuned by pushing it so that it is in the appropriate position. The rolling ball 7 on the base 4 can reduce friction and facilitate the movement of the horizontal steel plate 3. After the installation of the horizontal steel plate 3 is completed, workers are asked to weld the steel sheet piles 2 and the horizontal steel plate 3 to provide support and protection for the deep foundation pit.

[0023] The above-mentioned structure allows for rapid installation of the horizontal steel plate 3, significantly reducing the difficulty and improving the efficiency of installation. Furthermore, the positioning plate 8 allows for installation of horizontal steel plates 3 of varying sizes. Furthermore, the rolling ball 7 assists in fine-tuning the horizontal steel plate 3, allowing it to be quickly moved to the appropriate position for welding and fixation, thereby supporting the deep foundation pit.

[0024] When the deep foundation pit operation is completed, the steel sheet piles 2 and the horizontal steel plate 3 are separated by cutting the horizontal steel plate 3 and setting up a protective shed underneath. The positioning rods 14 are then removed from the positioning plates 8 so that the positioning plates 8 no longer limit the horizontal steel plate 3, making it easier for workers to quickly remove the used horizontal steel plate 3. Once the horizontal steel plate 3 is removed, the steel sheet piles 2 can be quickly removed from the deep foundation pit, completing the disassembly work.

[0025] A rectangular groove 15 is provided on one side of the positioning plate 8. A sliding plate 16 is slidably connected to the interior of the rectangular groove 15. One side of the sliding plate 16 protrudes from the rectangular groove 15. Several elastic members 17 are fixedly installed in the rectangular groove 15. One side of the elastic member 17 is fixedly connected to the sliding plate 16. The elastic member 17 is a hollow elastic ball with shrinkage holes on its surface. A conduit 18 is fixedly installed on one side of the positioning plate 8. The conduit 18 is connected to the interior of the several elastic members 17. A fixing block 27 is fixedly installed on one side of the positioning plate 8. A placement groove 19 is provided inside the fixing block 27 and the positioning plate 8. A sealing plate 20 is sealingly and slidably connected to the interior of the placement groove 19. A connecting rod 21 is fixedly installed on one side of the sealing plate 20. A push plate 22 is fixedly installed on the side of the connecting rod 21 away from the sealing plate 20. The side of the conduit 18 away from the elastic member 17 is connected to the interior of the placement groove 19.

[0026] Specifically, the side of the sliding plate 16 that protrudes from the rectangular slot 15 is curved, and several rollers 23 are rotatably connected to this curved surface of the sliding plate 16. A triangular cleaning plate 24 is fixedly mounted on the side of the push plate 22 that faces away from the connecting rod 21. A brush is fixedly mounted on the inclined surface of the cleaning plate 24. A baffle 25 is fixedly mounted within the placement slot 19, and a cushioning pad 26 made of a flexible material is fixedly mounted on one side of the baffle 25.

[0027] During operation, as the horizontal steel plate 3 is guided between the steel sheet piles 2 and the positioning plate 8 by the guide plate 9 and guide posts 11, it moves downward, coming into contact with the curved surface of the sliding plate 16 and several rollers 23. The rollers 23 compress the sliding plate 16, causing it to slide and contract within the rectangular groove 15, thereby compressing the elastic member 17 within the groove 15. The compressed gas within the elastic member 17 enters the conduit 18 through the contraction holes, and then enters the placement groove 19 through the conduit 18. This gas pushes the sealing plate 20 within the placement groove 19, forcing it to slide away from the placement groove 19 along with the push plate 22 and cleaning plate 24 via the connecting rod 21. The triangular cleaning plate 24 removes impurities from the surface of the base 4 and simultaneously cleans the base 4 surface with a brush (here, the cleaning is targeted at the area where the horizontal steel plate 3 is placed). A baffle 25 and cushion 26 prevent the sealing plate 20 from sliding excessively out of the placement groove 19. As the horizontal steel plate 3 continues to move downward and no longer presses the sliding plate 16, the elastic member 17 is no longer subjected to the pressing force and returns to its original state. The gas in the placement groove 19 flows back into the corresponding elastic member 17 through the conduit 18. At the same time, the sealing plate 20, through the connecting rod 21, brings the push plate 22 and the cleaning plate 24 back to their original position, thereby not affecting the placement of the horizontal steel plate 3 on the base 4.

[0028] The above-designed structure enables pre-cleaning of the area on the base 4 where the horizontal steel plate 3 is placed, thereby reducing the impact of impurities on the placement of the horizontal steel plate 3, allowing the horizontal steel plate 3 to remain horizontally placed, which is more conducive to subsequent welding work.

[0029] A protective structure for deep foundation pit support and a disassembly and assembly method thereof, the method using the above-mentioned protective structure for deep foundation pit support, the method comprising the following steps: S1: Insert several steel sheet piles 2 into the deep foundation pit so that the steel sheet piles 2 fit in with the foundation pit surface 1. Slide the positioning plate 8 in the chute 12 of the base 4 to change the gap between the positioning plate 8 and the steel sheet piles 2, thereby adapting to horizontal steel plates 3 of different sizes. S2: When the positioning plate 8 is slid to the appropriate position, it stops and the positioning rod 14 is inserted into the positioning plate 8 through the positioning hole 13 to fix it in place. Then, the horizontal steel plate 3 to be welded is moved to the top of the base 4 using a sling and slowly lowered toward the base 4. The steel sheet pile 2 and the horizontal steel plate 3 are then welded. S3: After the deep foundation pit operation is completed, the steel sheet piles 2 and the horizontal steel plate 3 are separated by cutting the horizontal steel plate 3 and setting up a protective shed underneath.

[0030] Working Principle: Several steel sheet piles 2 are inserted into a deep foundation pit, allowing them to align with the pit surface 1. Positioning plates 8 are then slid within the chute 12 of the base 4 to adjust the gap between them and the steel sheet piles 2, allowing for welding and installation of horizontal steel plates 3 of varying sizes. Once the positioning plates 8 are adjusted to the desired position, they are stopped. Positioning rods 14 are inserted through the positioning holes 13 into the positioning plates 8 to secure them in place. The horizontal steel plates 3 to be welded are then positioned above the base 4 using a sling and slowly lowered toward the base 4. The curved surface of the guide plate 9 and several guide posts 11 on the positioning plates 8 guide the inserted horizontal steel plates 3, allowing them to be quickly inserted into the gap between them and the steel sheet piles 2. The guide posts 11 also assist in guiding the movement. Once the horizontal steel plates 3 are placed on the base 4, they are fine-tuned by pushing to position them properly. The rolling balls 7 on the base 4 reduce friction, facilitating their movement. After the horizontal steel plate 3 is installed, workers weld the steel sheet piles 2 to the horizontal steel plate 3, providing support and protection for the deep foundation pit. Once the deep foundation pit work is complete, the steel sheet piles 2 and horizontal steel plate 3 are separated by cutting the horizontal steel plate 3 and setting up a protective shed underneath. The positioning rods 14 are then removed from the positioning plates 8, freeing them from the positioning of the horizontal steel plate 3 and facilitating quick removal of the used horizontal steel plate 3. Once the horizontal steel plate 3 is removed, the steel sheet piles 2 can be quickly removed from the deep foundation pit, completing the disassembly.

[0031] As the horizontal steel plate 3 is guided between the steel sheet piles 2 and the positioning plate 8 by the guide plate 9 and guide posts 11, it moves downward, coming into contact with the curved surface of the sliding plate 16 and several rollers 23. The rollers 23 compress the sliding plate 16, causing it to slide and contract within the rectangular groove 15, thereby squeezing the elastic member 17 within the rectangular groove 15. The compressed gas within the elastic member 17 enters the conduit 18 through the contraction hole, and then enters the placement groove 19 through the conduit 18. This gas pushes the sealing plate 20 within the placement groove 19, causing it to slide away from the placement groove 19 along with the push plate 22 and cleaning plate 24 via the connecting rod 21. The triangular cleaning plate 24 pushes impurities off the surface of the base 4 while simultaneously cleaning the base 4 with a brush. The installation of a baffle 25 and a cushion 26 prevents the sealing plate 20 from sliding excessively out of the placement groove 19. As the horizontal steel plate 3 continues to move downward and no longer presses the sliding plate 16, the elastic member 17 is no longer subjected to the pressing force and returns to its original state. The gas in the placement groove 19 flows back into the corresponding elastic member 17 through the conduit 18. At the same time, the sealing plate 20, through the connecting rod 21, brings the push plate 22 and the cleaning plate 24 back to their original position, thereby not affecting the placement of the horizontal steel plate 3 on the base 4.

[0032] The above-mentioned front, back, left, right, up and down are all based on the Figure 1 As a benchmark, according to the person's observation perspective, the side of the device facing the observer is defined as the front, the left side of the observer is defined as the left, and so on.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present invention.

[0034] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A protective structure for deep foundation pit support, comprising a foundation pit surface (1), a plurality of steel sheet piles (2) installed on the foundation pit surface (1), and a horizontal steel plate (3) provided on one side of the plurality of steel sheet piles (2); characterized in that: The side of the steel sheet pile (2) away from the foundation pit surface (1) is mounted with a base (4) via bolts (5); the base (4) is L-shaped, a plurality of grooves (6) are provided on the top of the base (4), and rolling balls (7) are movably connected inside the grooves (6); a positioning plate (8) is provided on the base (4); The horizontal steel plate (3) is located on the base (4), and the horizontal steel plate (3) is located between the steel sheet pile (2) and the positioning plate (8).

2. The protective structure for deep foundation pit support according to claim 1, characterized in that: A guide plate (9) is fixedly mounted on the top of the positioning plate (8), one side of the guide plate (9) is arc-shaped, and a plurality of receiving grooves (10) are provided on the arc-shaped surface of the guide plate (9), and a guide column (11) made of a flexible material is rotatably connected in the receiving groove (10).

3. The protective structure for deep foundation pit support according to claim 1, characterized in that: A slide groove (12) is provided on the top of the base (4), and the positioning plate (8) slides in the slide groove (12). A plurality of positioning holes (13) communicating with the interior of the slide groove (12) are provided on one side of the base (4). A positioning rod (14) is provided on one side of the base (4), and the positioning rod (14) passes through the positioning hole (13) and is inserted into the positioning plate (8).

4. The protective structure for deep foundation pit support according to claim 1, characterized in that: A rectangular groove (15) is provided on one side of the positioning plate (8), a sliding plate (16) is slidably connected inside the rectangular groove (15), one side of the sliding plate (16) protrudes from the rectangular groove (15), a plurality of elastic members (17) are fixedly installed in the rectangular groove (15), one side of the elastic member (17) is fixedly connected to the sliding plate (16), the elastic member (17) is a hollow elastic ball, a shrinkage hole is provided on the surface of the elastic member (17), a conduit (18) is fixedly installed on one side of the positioning plate (8), and the conduit (18) and the interior of the plurality of elastic members (17) are connected; A fixing block (27) is fixedly mounted on one side of the positioning plate (8), a placement groove (19) is provided inside the fixing block (27) and the positioning plate (8), a sealing plate (20) is sealingly and slidingly connected inside the placement groove (19), a connecting rod (21) is fixedly mounted on one side of the sealing plate (20), a push plate (22) is fixedly mounted on the side of the connecting rod (21) away from the sealing plate (20), and a side of the conduit (18) away from the elastic member (17) is connected to the inside of the placement groove (19).

5. The protective structure for deep foundation pit support according to claim 4, characterized in that: A side of the sliding plate (16) protruding from the rectangular groove (15) is arc-shaped, and a plurality of rolling columns (23) are rotatably connected to the arc-shaped surface of the sliding plate (16).

6. The protective structure for deep foundation pit support according to claim 5, characterized in that: A triangular cleaning plate (24) is fixedly mounted on one side of the push plate (22) away from the connecting rod (21), and a brush is fixedly mounted on the inclined surface of the cleaning plate (24).

7. The protective structure for deep foundation pit support according to claim 6, characterized in that: A baffle (25) is fixedly installed in the placement groove (19), and a buffer pad (26) made of a flexible material is fixedly installed on one side of the baffle (25).

8. A protective structure for deep foundation pit support and a method for disassembling and assembling the same, the method using the protective structure for deep foundation pit support according to any one of claims 1 to 7, characterized in that: The method comprises the following steps: S1: inserting a plurality of steel sheet piles (2) into a deep foundation pit so that the steel sheet piles (2) fit in contact with the foundation pit surface (1), and sliding the positioning plate (8) in the chute (12) of the sliding base (4) to change the gap between the positioning plate (8) and the steel sheet piles (2), thereby adapting to horizontal steel plates (3) of different sizes; S2: When the positioning plate (8) is slid to a suitable position, it stops and the positioning rod (14) is inserted into the positioning plate (8) through the positioning hole (13) to limit and fix it. At this time, the horizontal steel plate (3) to be welded is moved to the top of the base (4) by the lifting device and slowly lowered to the base (4), and then the steel sheet pile (2) and the horizontal steel plate (3) are welded; S3: After the deep foundation pit operation is completed, the steel sheet piles (2) and the horizontal steel plate (3) are separated by cutting the horizontal steel plate (3) and setting up a protective shed underneath.

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