Waterproof plugging structure and construction method for SMW method pile retaining wall

Abstract

The embodiment of the application provides a waterproof leaking stop structure used by a SMW method pile retaining wall and a construction method. The waterproof leaking stop structure comprises a sealing plate, the inner side of the sealing plate is provided with a grouting groove and a groove, the groove surrounds the grouting groove, and the inner side of the sealing plate can be fixed with the retaining wall; a pressing plate and a first sealing sheet matched with the shape of the groove, the pressing plate is located in the groove, and the side of the pressing plate facing the retaining wall is fixed with the first sealing sheet; an extrusion mechanism connected with the pressing plate; the extrusion mechanism is used for driving the pressing plate to move towards the retaining wall and extrude the first sealing sheet to seal the gap between the sealing plate and the retaining wall after the inner side of the sealing plate is fixed with the retaining wall and the grouting groove is grouted. The embodiment of the application solves the technical problem that the single grouting sealing effect of the SMW method pile retaining wall leakage position is poor, and multiple grouting sealing is required.

Description

Technical Field

[0001] This application relates to the field of building engineering technology, specifically to a waterproof and leak-stopping structure and construction method for SMW method pile retaining walls. Background Technology

[0002] Subway construction is underway on a large scale in urban infrastructure projects. During the construction of subway foundation pits, SMW (Self-Modified Welded Mulch) pile retaining walls need to be installed inside the pit sidewalls to protect the construction pit. However, quality defects are inevitable in construction operations. SMW pile retaining walls may experience water seepage or even sand flow during the construction phase, posing a significant threat to the safety of the foundation pit. Therefore, it is necessary to seal any leaks in the SMW pile retaining walls.

[0003] In existing technologies, when dealing with leaks in retaining walls, a mixture of cement and water glass grout is mostly used for grouting and sealing. However, sealing the leaks by grouting alone is not very effective. The cured grout material is easily affected by environmental disturbances and cracks may form, leading to repeated leaks. Therefore, multiple grouting and sealing operations are often required, making the seepage prevention and sealing work of the retaining wall time-consuming. This directly affects the overall progress of the foundation pit excavation and construction, and consequently has an adverse impact on the entire project schedule.

[0004] Therefore, the poor single-time grouting effect of sealing the leakage points of the SMW method pile retaining wall, which requires multiple grouting and sealing, is a technical problem that urgently needs to be solved by those skilled in the art.

[0005] The information disclosed in the background section is only intended to enhance the understanding of the background of this application, and therefore may contain information that is not part of the prior art known to those skilled in the art. Summary of the Invention

[0006] This application provides a waterproof and leak-stopping structure and construction method for SMW method pile retaining walls, in order to solve the technical problem that the single grouting and sealing effect of the leakage location of the SMW method pile retaining wall is poor, which leads to the need for multiple grouting and sealing.

[0007] According to a first aspect of the embodiments of this application, a waterproof and leak-stopping structure for use in SMW method pile retaining walls is provided, comprising:

[0008] A sealing plate, wherein the inner side of the sealing plate has a grouting groove and a recess, and the recess surrounds the grouting groove, and the inner side of the sealing plate can be fixed to the retaining wall;

[0009] A pressure plate and a first sealing sheet that mate with the groove shape, wherein the pressure plate is located within the groove and the first sealing sheet is fixed on the side of the pressure plate facing the enclosure wall;

[0010] An extrusion mechanism connected to the pressure plate; the extrusion mechanism is used to move the pressure plate toward the retaining wall after the sealing plate is fixed to the inner side of the retaining wall and the grouting groove is grouted, to extrude the first sealing piece to seal the gap between the sealing plate and the retaining wall.

[0011] According to a second aspect of the embodiments of this application, a construction method for a waterproof and leak-stopping structure is provided, comprising the following steps:

[0012] The inner side of the sealing plate is fixed to the enclosure wall, and adjacent sealing plates are spliced ​​together.

[0013] Inject polyurethane sealant into the grouting tank;

[0014] The pressure plate is moved toward the enclosure wall to press the first sealing sheet to seal the gap between the sealing plate and the enclosure wall.

[0015] The embodiments of this application, by adopting the above technical solutions, have the following technical effects:

[0016] After the sealing plate is fixed to the inner side of the retaining wall and the grouting groove is grouted, the initial sealing of the leakage point and the fixation of the sealing plate are achieved. The extrusion mechanism drives the pressure plate to move towards the retaining wall, and the first sealing piece fixed to the pressure plate also moves towards the retaining wall, causing the first sealing piece and the retaining wall to press against each other, deforming the first sealing piece. This makes it difficult for liquid at the leakage point to leak to the outside through the gap between the sealing plate and the retaining wall. The waterproof and leak-stopping structure has a good waterproof and leak-stopping effect, that is, further sealing is achieved. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0018] Figure 1 This is a schematic diagram of the waterproof and leak-stopping structure and the fixing of the retaining wall used in the SMW method pile retaining wall of this application embodiment;

[0019] Figure 2 This is a schematic diagram of the waterproof and leak-stopping structure according to an embodiment of this application;

[0020] Figure 3 This is a schematic diagram of the waterproof and leak-stopping structure of this application from another angle and in partial cross-section;

[0021] Figure 4 This is a schematic diagram of the cooperative structure of the sealing plate, pressure plate and extrusion mechanism of the waterproof and leak-stopping structure in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the cooperative structure of the sealing plate, top plate and push plate of the waterproof and leak-stopping structure according to an embodiment of this application;

[0023] Figure 6 This is a schematic diagram of the mating structure of the plug and slot in the waterproof and leak-stopping structure according to an embodiment of this application.

[0024] Figure label:

[0025] 1. Enclosure wall body; 11. Steel profiles;

[0026] 2. Sealing plate; 21. Grouting groove; 22. Groove; 221. Pressure plate; 222. First sealing plate; 23. Cavity; 231. First threaded through hole; 232. Second through hole; 24. First through hole; 25. Slot; 251. Protrusion; 3. Grouting pipe; 31. Grouting pipe valve; 4. Exhaust pipe; 41. Exhaust pipe valve;

[0027] 5. Extrusion mechanism; 51. Slide plate; 511. Rounded corner; 52. Connecting rod; 53. Slide plate spring; 54. Drive component; 541. Threaded rod;

[0028] 6. Insert block; 61. Second sealing plate; 62. Sealing groove; 621. Third through hole; 63. Push plate; 631. Third sealing plate; 632. Push plate spring;

[0029] 64. Extruded part; 641. Top plate; 642. Inclined surface;

[0030] 7. Apply waterproof adhesive. Detailed Implementation

[0031] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0032] Example 1

[0033] This application provides a waterproof and leak-stopping structure for SMW method pile retaining walls, which is particularly suitable for Figure 1 The aforementioned enclosure wall. For example... Figure 1 As shown, the enclosure wall includes:

[0034] The retaining wall body 1 is installed inside the side wall of the foundation pit;

[0035] Multiple steel profiles 11 are provided inside the enclosure wall body 1 at intervals along the length of the enclosure wall body 1.

[0036] In this way, the steel profile 11 installed inside the enclosure wall body 1 improves the structural strength of the enclosure wall. At the same time, the installation of the steel profile 11 also facilitates the welding and fixing of the inner side of the sealing plate 2 of the waterproof and leak-stopping structure to the steel profile 11, so that the sealing plate 2 can be easily fixed to the side wall of the enclosure wall body 1.

[0037] Specifically, section 11 is an I-beam.

[0038] like Figures 1 to 5 As shown in the figure, this application provides a waterproof and leak-stopping structure for SMW method pile retaining walls, including:

[0039] The sealing plate 2 has a grouting groove 21 and a recess 22 on its inner side, and the recess 22 surrounds the grouting groove 21. The inner side of the sealing plate can be fixed to the retaining wall.

[0040] A pressure plate 221 and a first sealing sheet 222 that mate with the groove shape, wherein the pressure plate 221 is located within the groove 22 and the first sealing sheet 222 is fixed on the side of the pressure plate 221 facing the enclosure wall;

[0041] The extrusion mechanism 5 is connected to the pressure plate; the extrusion mechanism is used to move the pressure plate 221 toward the retaining wall after the sealing plate 2 is fixed to the retaining wall on the inner side of the sealing plate 2 and the grouting groove 21 is grouted, and to extrude the first sealing piece to seal the gap between the sealing plate and the retaining wall.

[0042] The waterproof and leak-stopping structure used in the SMW method pile retaining wall of this application embodiment achieves initial leak-stopping and fixation of the sealing plate after the sealing plate 2 is fixed to the retaining wall on the inner side and the grouting groove 21 is grouted. The extrusion mechanism drives the pressure plate 221 to move towards the retaining wall, and the first sealing piece 222 fixed to the pressure plate 221 also moves towards the retaining wall, causing the first sealing piece 222 and the retaining wall to press against each other, deforming the first sealing piece 222. This makes it difficult for liquid at the leak location to leak out to the outside through the gap between the sealing plate and the retaining wall. The waterproof and leak-stopping structure has a good waterproof and leak-stopping effect, that is, it achieves further sealing.

[0043] Specifically, polyurethane sealant was used for grouting.

[0044] Specifically, such as Figure 2 As shown, groove 22 is a U-shaped groove.

[0045] During implementation, such as Figure 2 and Figure 3As shown, the waterproofing and leak-stopping structure also includes:

[0046] The grouting pipe 3 and the vent pipe 4 penetrate the sealing plate 2, with the first end of the grouting pipe 3 and the vent pipe 4 forming the bottom of the grouting groove 21; the second end of the pipe extends out from the outside of the sealing plate.

[0047] The grouting pipe valve 31 is installed at the second end of the grouting pipe 3.

[0048] The exhaust pipe valve 41 is installed at the second end of the exhaust pipe 4.

[0049] Specifically, the exhaust pipe 4 is located above the grouting pipe 3.

[0050] After installing the sealing plate 2 on the retaining wall, open the grouting pipe valve 31 and the venting pipe valve 41. Inject the polyurethane sealant into the grouting tank 21 through the grouting pipe 3. During the injection process, air in the grouting tank 21 is expelled through the venting pipe 4, ensuring smooth injection of the polyurethane sealant. After the polyurethane sealant injection is complete, close the grouting pipe valve 31 and the venting pipe valve 41. The injected polyurethane sealant then seals the leak, reducing the possibility of liquid leakage and improving the sealing effect of the sealing plate 2.

[0051] During implementation, such as Figure 4 As shown, the sealing plate has a cavity 23 inside, and a first threaded through hole 231 connecting the cavity 23 to the outside on the outside; the bottom of the groove 22 has a first through hole 24 connecting the groove 22 and the cavity 23.

[0052] The extrusion mechanism includes:

[0053] The slide plate 51 is slidably connected to the inner wall of the cavity 23;

[0054] A connecting rod 52 passes through the first through hole 24 and is fixed at both ends to the sliding plate 51 and the pressure plate 221, respectively.

[0055] A threaded rod 541 passes through the first threaded through hole 231 and has one end abutting against the outside of the slide plate 51, while the other end protrudes outside the sealing plate.

[0056] Rotating the threaded rod 541 causes the sliding plate 51, connecting rod 52, and pressure plate 221 to move toward the enclosure wall and compress the first sealing sheet.

[0057] The pressure plate 221, connecting rod 52, and sliding plate 51 are fixed as a whole. The connecting rod 52 passes through the first through hole 24 at the bottom of the groove 22, so that the pressure plate 221 is located in the groove 22 and the sliding plate 51 is located in the cavity 23. Rotating the threaded rod 541 exposes one end of the sealing plate, and the other end of the threaded rod 541 pushes the sliding plate 51 towards the enclosure wall, thereby moving the sliding plate 56 towards the enclosure wall, and thus moving the pressure plate 221 and the first sealing plate 222 towards the enclosure wall.

[0058] Specifically, such as Figure 4 As shown, cavity 23 is a flat rectangular cavity. There are four first through holes 24, located at the four corners of cavity 23.

[0059] In this way, the pressure plate 221 can be moved as a whole toward the enclosure wall.

[0060] During implementation, such as Figure 4 As shown, the extrusion mechanism further includes:

[0061] A skateboard spring 53 is provided, with its two ends fixed to the outer sides of the skateboard 51 and the sealing plate, respectively, to elastically support the skateboard 51.

[0062] The slide spring 53 provides elastic support for the slide plate 51. This provides elastic support when the threaded rod 541 is rotated to move the slide plate 51 toward the enclosure wall, making rotation easier.

[0063] During implementation, such as Figure 2 , Figure 3 and Figure 4 As shown, the waterproofing and leak-stopping structure also includes:

[0064] Insert 6 and slot 25 are disposed on opposite end faces of the sealing plate 2; two adjacent sealing plates 2 are connected by inserting and engaging insert 6 and slot 25.

[0065] When the leakage in the enclosure wall is large, multiple waterproofing and leak-stopping structures need to be spliced ​​together. To achieve this splicing, such as... Figure 6 As shown, the waterproof and leak-stopping structure is equipped with a plug 6 and a slot 25.

[0066] like Figure 1 As shown, multiple waterproof and leak-stopping sealing plates 2 are connected in sequence along the vertical direction at the leakage locations on the side wall of the enclosure wall body 1.

[0067] The top insert 6 of the sealing plate 2 is installed into the slot 25 at the bottom of the adjacent sealing plate 2 to connect the sealing plates 2 sequentially in the vertical direction. Both ends of the sealing plate 2 are then welded to the steel profile 11 on the retaining wall, thus fixing the sealing plate 2 to the retaining wall body 1. The sealing plate 2 effectively seals and protects against leaks on the retaining wall. In this way, by using a suitable number of waterproof and leak-stopping structures based on the size of the leak location on the side wall of the retaining wall body 1, the leak location can be sealed and the waterproof and leak-stopping structure can be fixed.

[0068] To address the sealing issue at the joints when multiple waterproofing and leak-stopping structures are joined together. During implementation, such as... Figure 5 As shown, the insert has a sealing groove 62, and an opening at the bottom of the sealing groove 62 connects to the cavity to form a third through hole 621 located in the insert and a second through hole 232 connecting to the cavity 23.

[0069] The waterproof and leak-stopping structure also includes:

[0070] A push plate 63 and a third sealing piece 631 that are shaped to fit the sealing groove, wherein the push plate 63 is located inside the sealing groove and the third sealing piece 631 is fixed on the side of the push plate facing outward;

[0071] A top plate 641 is located in the third through hole 621 and the second through hole 232. The control side of the top plate 641 extends into the cavity 23, and the side of the top plate opposite to the control side is fixed to the top plate 641.

[0072] When the sliding plate 51 moves toward the inside of the sealing plate, the sliding plate 51 approaches and presses against the control side of the top plate, pushing the top plate 641 upward, thereby causing the push plate 63 and the third sealing piece 631 to move away from the cavity 23.

[0073] In this way, rotating the threaded rod 541 can, on the one hand, compress the first sealing plate to seal the gap between the sealing plate and the retaining wall; on the other hand, it can also move the top plate 641 and the third sealing plate 631 upward, closely cooperate with the bottom of the slot 25 of the adjacent sealing plate 2, so that the sealing performance between adjacent waterproof and leak-stopping structures is better.

[0074] Correspondingly, such as Figure 4 As shown, the bottom of the slot 25 has a protrusion 251.

[0075] After the third sealing piece 631 comes into contact with the protrusion 251 of the slot 25, it is squeezed and deformed, which creates a wavy gap at the contact point between the protrusion 251 and the third sealing piece 631. This prolongs the flow path when liquid leaks, making it less likely for liquid to leak through the gap at the contact point between the protrusion 251 and the third sealing piece 631, thereby reducing the possibility of liquid leakage.

[0076] During implementation, such as Figure 5 As shown, the waterproof and leak-stopping structure also includes:

[0077] A push plate spring 632, one end of which is connected to the bottom of the sealing groove 62, and the other end is connected to the push plate 63;

[0078] The outer side of the insert 6 is fixed with a second sealing plate 61.

[0079] The push plate spring 632 provides elastic support for the push plate 63. Thus, when the threaded rod 541 is rotated to move the sliding plate 51 toward the enclosure wall, the push plate 63 also moves upward. The push plate spring 632 provides elastic support for the push plate 63, making it easier to rotate the threaded rod 541.

[0080] The second sealing piece 61 ensures good sealing after the insertion block 6 and the slot 25 are joined, resulting in better sealing between adjacent waterproof and leak-stopping structures.

[0081] The top of the insert 6 has a third sealing plate 631, and the sides have second sealing plates 61, so that the three sides of the slot 25 of the insert 6 are sealed, resulting in good sealing between adjacent waterproof and leak-proof structures.

[0082] During implementation, such as Figure 5 As shown, the control side of the top plate 641 facing the slide plate 51 has an inclined surface, and the slide plate 51 facing the control side of the top plate 641 has rounded corners.

[0083] When the sliding plate 51 moves inward toward the sealing plate, the rounded corners of the sliding plate 51 approach and press against the inclined surface of the control side of the top plate.

[0084] As the sliding plate 51 slides towards the enclosure wall, the rounded corner 511 of the sliding plate 51 gradually approaches and contacts the inclined surface 642 at the end of the top plate 641. As the sliding plate 51 goes deeper, it presses the top plate 641 upward and pushes the push plate 63 upward, causing the third sealing plate 631 to come into contact with the protrusion 251 at the bottom of the slot 25 and be deformed by compression. In this way, a wavy gap is generated at the contact area between the protrusion 251 and the third sealing plate 631, which prolongs the flow path when liquid leaks, making it less likely for liquid to leak through the gap at the contact area between the protrusion 251 and the third sealing plate 631, thereby reducing the possibility of liquid leakage.

[0085] Specifically, the top plate 641 and the inclined surface 642 form the extrusion part 64.

[0086] Specifically, such as Figure 1 As shown, waterproof adhesive 7 is applied to the joint where the sealing plate 2 contacts the enclosure wall body 1;

[0087] Waterproof adhesive 7 is also applied to the joint where the sealing plate 2 and the steel profile 11 come into contact;

[0088] Waterproof adhesive 7 is also applied around the sealing plate 2.

[0089] The waterproof adhesive 7 enhances the waterproof and leak-stopping effect of the waterproof and leak-stopping structure, reducing the possibility of water leakage in the main body of the enclosure wall 1.

[0090] This application provides a waterproof and leak-stopping structure for use with SMW method pile retaining walls. It employs a combination of grouting and welding of steel plates (the sealing plate and the steel section are welded and fixed) for seepage prevention and leak-stopping. Initial leak sealing is achieved by injecting a sealing agent into the leak location, and further sealing is achieved by installing a welded steel plate on the outside of the leak location. This leak-stopping structure not only reduces the need for multiple grouting injections at the leak location but also has a more stable structural form, making the sealing agent injected into the retaining wall less susceptible to cracking due to external environmental influences. This waterproof and leak-stopping structure uses multiple layers of protection, has a simple structural system, and allows for rapid construction, improving the efficiency and effectiveness of retaining wall leak-stopping work, significantly increasing the success rate of treating leaks on the foundation pit sidewalls, improving the safety of foundation pit construction while effectively shortening the construction period, and complying with green technology for foundation pit engineering, without affecting the recycling and reuse of the SMW method pile H-beams.

[0091] Example 2

[0092] This application describes a construction method for a waterproof and leak-stopping structure used in the SMW method pile retaining wall of Example 1, including the following steps:

[0093] The inner side of the sealing plate 2 is fixed to the enclosure wall, and adjacent sealing plates 2 are spliced ​​together;

[0094] Polyurethane sealing agent is injected into grouting tank 21;

[0095] The pressure plate 221 is moved toward the enclosure wall to press the first sealing piece to seal the gap between the sealing plate and the enclosure wall.

[0096] In practice, the step of moving the pressure plate 221 towards the retaining wall to press the first sealing sheet to seal the gap between the sealing plate and the retaining wall specifically includes:

[0097] Rotating the threaded rod 541 causes the sliding plate 51, connecting rod 52, and pressure plate 221 to move toward the enclosure wall and press the first sealing sheet; correspondingly, the sliding plate 51 approaches and presses the control side of the top plate, pushing the top plate 641 upward, thereby causing the push plate 63 and the third sealing sheet 631 to move away from the cavity 23.

[0098] The following describes the application method of the waterproof and leak-stopping structure used in the SMW method pile retaining wall in Example 1, in chronological order, including the following steps:

[0099] S1: Clean the surface of the steel section 11 on the side of the foundation pit where the leakage point is located on the retaining wall body 1, so that the surface of the steel section 11 meets the welding requirements. After connecting several sealing plates 2 in sequence, cover the leakage point on the retaining wall body 1, and weld the two ends of the sealing plates 2 to the surfaces of the two adjacent steel sections 11 respectively.

[0100] S2: Polyurethane sealant is injected into the grouting groove 21 of the sealing plate 2 through the grouting pipe 3. The polyurethane sealant seals the leakage location. The first sealing piece 222 is pressed against the side wall of the enclosure wall body 1 by rotating the threaded rod 541, thereby achieving waterproof sealing of the leakage location on the side wall of the enclosure wall body 1 by the sealing plate 2 and reducing the possibility of liquid leakage.

[0101] S3: Apply waterproof adhesive 7 to the edge seam of the sealing plate 2 near the side wall of the enclosure wall body 1. The waterproof adhesive 7 seals the edge seam, further improving the leak-stopping effect of the sealing plate 2.

[0102] In the description of this application and its embodiments, it should be understood that the terms "top", "bottom", "height", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0103] In this application and its embodiments, unless otherwise expressly specified and limited, the terms "set," "install," "connect," "link," "fix," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0104] In this application and its embodiments, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0105] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0106] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0107] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A waterproof and leak-stopping structure for SMW method pile retaining walls, characterized in that, include: The sealing plate (2) has a grouting groove (21) and a recess (22) on its inner side, and the recess (22) surrounds the grouting groove (21). The inner side of the sealing plate can be fixed to the retaining wall. A pressure plate (221) and a first sealing sheet (222) that mate with the groove shape, wherein the pressure plate (221) is located in the groove (22) and the first sealing sheet (222) is fixed on the side of the pressure plate (221) facing the enclosure wall. The extrusion mechanism (5) is connected to the pressure plate; the extrusion mechanism is used to move the pressure plate (221) toward the retaining wall after the sealing plate (2) is fixed to the retaining wall on the inner side and the grouting groove (21) is grouted, and to extrude the first sealing piece to seal the gap between the sealing plate and the retaining wall. The sealing plate has an internal cavity (23), and the outer side of the sealing plate has a first threaded through hole (231) connecting the cavity (23) and the outside; the bottom of the groove (22) has a first through hole (24) connecting the groove (22) and the cavity (23). The extrusion mechanism includes: The slide plate (51) is slidably connected to the inner wall of the cavity (23); A connecting rod (52) passes through the first through hole (24) and its two ends are fixed to the sliding plate (51) and the pressure plate (221) respectively; A threaded rod (541) passes through the first threaded through hole (231) and one end abuts against the outside of the slide plate (51), while the other end protrudes outside the outside of the sealing plate; Rotating the threaded rod (541) causes the sliding plate (51), connecting rod (52) and pressure plate (221) to move toward the enclosure wall and press the first sealing sheet. Waterproofing and leak-stopping structures also include: Insert (6) and slot (25) are provided on opposite end faces of the sealing plate (2); two adjacent sealing plates (2) are connected by the insertion of insert (6) and slot (25); The insert has a sealing groove (62), and an opening at the bottom of the sealing groove (62) connects to the cavity to form a third through hole (621) located in the insert and a second through hole (232) connecting to the cavity (23). The waterproof and leak-stopping structure also includes: A push plate (63) and a third sealing piece (631) that are shaped to fit the sealing groove, wherein the push plate (63) is located inside the sealing groove and the third sealing piece (631) is fixed on the side of the push plate facing outward. A top plate (641) is located in the third through hole (621) and the second through hole (232). The control side of the top plate (641) extends into the cavity (23), and the side of the top plate opposite to the control side is fixed to the top plate (641). When the sliding plate (51) moves toward the inside of the sealing plate, the sliding plate (51) approaches and presses against the control side of the top plate, pushing the top plate (641) upward, thereby causing the push plate (63) and the third sealing piece (631) to move away from the cavity (23).

2. The waterproof and leak-stopping structure according to claim 1, characterized in that, Also includes: A grouting pipe (3) and an exhaust pipe (4) penetrate the sealing plate, with the first end of the grouting pipe (3) and the exhaust pipe (4) forming the bottom of the grouting groove (21); the second end extends out from the outside of the sealing plate. The grouting pipe valve (31) is installed at the second end of the grouting pipe (3); An exhaust pipe valve (41) is installed at the second end of the exhaust pipe (4).

3. The waterproof and leak-stopping structure according to claim 2, characterized in that, The extrusion mechanism further includes: A skateboard spring (53) is fixed at both ends to the outside of the skateboard (51) and the sealing plate to elastically support the skateboard (51).

4. The waterproof and leak-stopping structure according to claim 3, characterized in that, The bottom of the slot (25) has a protrusion (251).

5. The waterproof and leak-stopping structure according to claim 3, characterized in that, The waterproof and leak-stopping structure also includes: A push plate spring (632), one end of which is connected to the bottom of the sealing groove (62), and the other end is connected to the push plate; The outer side of the insert (6) is fixed with a second sealing plate (61).

6. The waterproof and leak-stopping structure according to claim 5, characterized in that, The control side of the top plate (641) facing the slide plate (51) has an inclined surface, and the slide plate (51) facing the control side of the top plate (641) has a rounded corner; When the slide plate (51) moves toward the inside of the sealing plate, the rounded corner of the slide plate (51) approaches and presses against the inclined surface of the control side of the top plate.

7. A construction method for a waterproof and leak-stopping structure according to any one of claims 1 to 6, characterized in that, Includes the following steps: The inner side of the sealing plate (2) is fixed to the enclosure wall, and adjacent sealing plates (2) are spliced ​​together; Polyurethane sealing agent is injected into the grouting tank (21); The pressure plate (221) is moved toward the enclosure wall to press the first sealing sheet to seal the gap between the sealing plate and the enclosure wall.

8. The construction method of the waterproof and leak-stopping structure according to claim 7, characterized in that, The step of moving the pressure plate (221) toward the retaining wall to press the first sealing sheet to seal the gap between the sealing plate and the retaining wall specifically includes: Rotating the threaded rod (541) causes the sliding plate (51), connecting rod (52) and pressure plate (221) to move toward the enclosure wall and squeeze the first sealing sheet; correspondingly, the sliding plate (51) approaches and squeezes the control side of the top plate, pushing the top plate (641) to move upward, thereby causing the push plate (63) and the third sealing sheet (631) to move away from the cavity (23).

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