A repair structure and construction method for expansion joints on the water-facing surface of a pool wall

Abstract

The present invention discloses a repair structure and construction method for the expansion joint on the water-facing surface of the pool wall, belonging to the technical field of pool construction. It includes a pool wall body, and an expansion joint is arranged inside the pool wall body. A whole-strip rubber part is hermetically connected inside the opening of the expansion joint, and a water-blocking part is arranged on the side of the whole-strip rubber part away from the expansion joint. In the present invention, the opening of the expansion joint is repaired by the water-blocking part and the whole-strip rubber part to ensure the overall use performance of the product. The sealing paste ensures the sealing performance between the water-blocking part, the connecting matrix and the pool wall body, so as to prevent the internal water source of the pool from entering between the water-blocking part, the connecting matrix and the pool wall body during the use of the pool. This not only prevents the corrosion phenomenon between the water-blocking part, the connecting matrix and the pool wall body, but also prevents the pool water from affecting the sealing performance between the expansion joint and the whole-strip rubber part, thereby affecting the repair effect of the expansion joint.

Description

Technical Field

[0001] The present invention belongs to the technical field of pool construction, and particularly relates to a expansion joint repair structure and construction method for the water-facing surface of a pool wall. Background Art

[0002] A pool expansion joint refers to a structural joint set at appropriate places along the bottom and wall of a pool to prevent cracks or damage to pool building components due to thermal expansion and contraction caused by changes in climate temperature.

[0003] Due to the action of the gravity and pressure of the pool water on the bottom expansion joint of the pool, it may be difficult to ensure the sealing and water-stopping effect and deformation repair effect of the wall expansion joint of the pool. Problems such as expansion joint water seepage, water-stop belt damage, and cumbersome repair of expansion and deformation often occur. Therefore, in view of the problems of expansion joint water seepage, water-stop belt damage, and cumbersome repair of expansion and deformation existing in the existing wall expansion joint of the pool, the present invention discloses a expansion joint repair structure and construction method for the water-facing surface of a pool wall. Summary of the Invention

[0004] The purpose of the present invention is to provide a expansion joint repair structure and construction method for the water-facing surface of a pool wall to solve the problems of easy damage to the water-stop belt, insufficient water-stopping performance of the expansion joint, and cumbersome repair of the wall expansion of the existing pool wall structure during the construction process.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A expansion joint repair structure and construction method for the water-facing surface of a pool wall, including a pool wall body. An expansion joint is arranged inside the pool wall body. A whole-strip rubber part is hermetically connected inside the opening of the expansion joint. A water-blocking part is arranged on the side of the whole-strip rubber part away from the expansion joint. A plurality of base platforms are arranged at the water-back end of the water-blocking part. All the plurality of base platforms are located inside the water-blocking part and are symmetrically arranged on both sides of the expansion joint. A connecting base body is fixedly connected to the side of the base platform away from the water-blocking part. The connecting base body is buried inside the pool wall body. A fastening part is arranged on the side of the base platform away from the connecting base body. At least one convex part is arranged on the side of the fastening part close to the water-blocking part. A concave part cooperating with the convex part is arranged on the side of the water-blocking part close to the convex part. A bent shrinkage joint is formed between the concave part and the convex part. A caulking component is arranged inside the shrinkage joint. A closing and sealing component is arranged at the opening of the shrinkage joint.

[0007] As a further description of the above technical solution:

[0008] The caulking assembly includes a bent caulking plate and a straight-section caulking plate. The bent caulking plate is arranged corresponding to the bent area of the shrinkage joint, and the straight-section caulking plate is arranged corresponding to the straight area of the shrinkage joint. Both the bent caulking plate and the straight-section caulking plate are made of polyethylene foam plastic plates.

[0009] As a further description of the above technical solution:

[0010] Sealant is filled between the bent caulking plate and the straight-section caulking plate, between the bent caulking plate and the shrinkage joint, and between the straight-section caulking plate and the shrinkage joint.

[0011] As a further description of the above technical solution:

[0012] A receiving groove is arranged inside the shrinkage joint. The receiving groove is arranged inside the water retaining member and is located above the concave part and the convex part. A water stop belt is arranged inside the receiving groove, and the water stop belt is located between the bent caulking plate and the straight-section caulking plate.

[0013] As a further description of the above technical solution:

[0014] Two sealants are arranged between the connecting base and the water retaining member, and the two sealants are symmetrically arranged on the outer peripheral side of the base.

[0015] As a further description of the above technical solution:

[0016] The closing and sealing assembly includes a folding water retaining rubber sleeve, a pressing sleeve, a pressing bolt and an expansion bolt. The folding water retaining rubber sleeve is arranged at the opening of the shrinkage joint, and both ends of the folding water retaining rubber sleeve are fixed on the end face at the opening of the shrinkage joint through expansion bolts. The pressing sleeve is buried inside the opening of the shrinkage joint, and a pressing bolt is threadedly installed inside the pressing sleeve. One end of the pressing bolt is rotatably connected to the folding water retaining rubber sleeve.

[0017] As a further description of the above technical solution:

[0018] The folding water retaining rubber sleeve is provided with an opening, and an adapter sleeve is arranged in the opening. One end of the pressing bolt passes through the inner hole of the adapter sleeve, and a seal is arranged between the pressing bolt and the inner hole of the adapter sleeve.

[0019] As a further description of the above technical solution:

[0020] A base connection hole is arranged on the water-facing end of the base. A connecting rib penetrates through the fastening member, and one end of the connecting rib extends into the base connection hole. A grouting port communicating with the base connection hole is also arranged on the fastening member.

[0021] As a further description of the above technical solution:

[0022] On the end face of the water-facing end of the connecting base body, at least one limiting and clamping part is arranged on both sides of the base platform, and a limiting groove corresponding to the limiting and clamping part for clamping is arranged on the end face of the water-blocking part that is joined with the connecting base body.

[0023] A construction method for a repair structure of the expansion joint on the water-facing surface of a pool wall includes the following steps:

[0024] S1. First, sequentially and closely embed two connecting base bodies inside the pool wall body, and make the two connecting base bodies located on both sides of the expansion joint, and ensure that the end faces of the water-facing ends of the base platforms on the connecting base bodies are flush.

[0025] S2. Apply connecting bars and sealant on the water-facing surfaces of the connecting base body on both sides of the base platform, symmetrically install water-blocking parts on both sides of the base platform through the connecting bars, and ensure that the water-facing surfaces of the water-blocking parts are flush. Ensure the sealing performance among the water-blocking part, the connecting base body, and the pool wall body through the sealant.

[0026] S3. Install a fastening part on the end face of the water-facing end of the base platform, insert the convex part of the fastening part into the concave part of the water-blocking part, so that a bent contraction joint is formed between the convex part and the concave part.

[0027] S4. Install a caulking assembly in the bent area of the contraction joint, and fill sealant in the gap between the caulking assembly and the contraction joint. Avoid the sealant from entering the accommodation groove when filling the sealant.

[0028] S5. Install a water stop belt between the accommodation groove on the convex part and the accommodation groove on the concave part. After the water stop belt is installed, grout is injected into the accommodation groove.

[0029] S6. Install a caulking assembly in the straight area of the contraction joint, fill sealant in the gap between the caulking assembly and the contraction joint, and reserve an installation space at the opening of the contraction joint.

[0030] S7. Install a closing and sealing assembly in the installation space at the opening of the contraction joint, seal the opening of the contraction joint through the closing and sealing assembly, and fill polymer seam-fixing glue in the gap between the closing and sealing assembly and the opening of the contraction joint, as well as in the gap between the closing and sealing assembly and the end face of the contraction joint opening. Finally, weld around the water-blocking part and at the corners to ensure the stable connection and sealing performance among the water-blocking part, the connecting base body, and the pool wall body.

[0031] In summary, due to the adoption of the above technical solutions, the beneficial effects of the present invention are:

[0032] 1. In the present invention, the opening of the expansion joint is repaired by the water retaining member and the integral strip-shaped rubber member to ensure the overall performance of the product. The sealing paste ensures the sealing between the water retaining member, the connecting base body and the pool wall body, so as to prevent the internal water source of the pool from entering between the water retaining member, the connecting base body and the pool wall body during use. This not only prevents the corrosion between the water retaining member, the connecting base body and the pool wall body, but also prevents the pool water from affecting the sealing between the expansion joint and the integral strip-shaped rubber member, thereby affecting the repair effect of the expansion joint.

[0033] 2. In the present invention, by prefabricating the connecting base body, the water retaining member, the fastening member and the base platform, the shape consistency of the connecting base body, the water retaining member, the fastening member and the base platform is ensured. At the same time, the connecting base body, the water retaining member, the fastening member and the base platform can be assembled modularly conveniently and efficiently to form the expansion joint of the pool wall, thereby avoiding the problems that the water stop belt is easily damaged and the installation of the water stop belt is inconvenient when constructing the expansion joint of the pool wall by pouring concrete temporarily on site.

[0034] 3. In the present invention, a convex portion is provided on one side of the fastening member, and a concave portion that fits with the convex portion is provided on one side of the water retaining member. Then, a bent expansion joint is formed between the convex portion and the concave portion, replacing the traditional straight expansion joint. The bent expansion joint ensures that the expansion joint of the pool wall can perform expansion and contraction compensation deformation in the direction parallel to the construction slit of the pool wall and perpendicular to the pool wall, thereby effectively avoiding cracks or damage in the structure caused by the thermal expansion and contraction of the pool wall.

[0035] 4. In the present invention, a water stop belt and a caulking member are arranged inside the bent expansion joint, and sealant is filled in the expansion joint to effectively seal the expansion joint against water. At the same time, a closing sealant is provided at the opening of the expansion joint, and the expansion joint is further sealed by the closing sealant, thereby effectively avoiding the occurrence of water seepage in the expansion joint. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is the overall structural schematic diagram of the present invention;

[0037] Figure 2 is the structural schematic diagram of the connecting base body in the present invention;

[0038] Figure 3 In the present invention Figure 1 is the partial enlarged structural schematic diagram at A;

[0039] Figure 4 is the partial internal structural schematic diagram of the water retaining member in the present invention;

[0040] Figure 5 is the internal structural schematic diagram of the base platform in the present invention;

[0041] Figure 6 is the structural schematic diagram of the fastening member in the present invention.

[0042] Legend Explanation:

[0043] 1. Pool wall body; 2. Connecting base; 3. Water retaining member; 4. Base platform; 5. Expansion joint; 6. Integral strip-shaped rubber member; 7. Shrinkage joint; 8. Caulking assembly; 801. Bent caulking plate; 802. Straight-section caulking plate; 9. Closing and sealing assembly; 901. Folding water retaining rubber sleeve; 902. Compression sleeve; 903. Compression bolt; 904. Expansion bolt; 10. Accommodation groove; 11. Fastening member; 12. Waterstop; 13. Sealant; 14. Concave part; 15. Convex part. Specific Embodiment

[0044] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0045] Please refer to Figures 1-6 , the present invention provides a technical solution: a repair structure and construction method for the expansion joint on the water-facing side of a pool wall, including a pool wall body 1, an expansion joint 5 is arranged inside the pool wall body 1, an integral strip-shaped rubber member 6 is hermetically connected inside the opening of the expansion joint 5, a water retaining member 3 is arranged on the side of the integral strip-shaped rubber member 6 away from the expansion joint 5, a plurality of base platforms 4 are arranged at the back water end of the water retaining member 3, a plurality of base platforms 4 are all located inside the water retaining member 3, and a plurality of base platforms 4 are symmetrically arranged on both sides of the expansion joint 5. One side of the base platform 4 away from the water retaining member 3 is fixedly connected with a connecting base 2, the connecting base 2 is buried inside the pool wall body 1, a fastening member 11 is arranged on the side of the base platform 4 away from the connecting base 2, at least one convex part 15 is arranged on the side of the fastening member 11 close to the water retaining member 3, and a concave part 14 cooperating with the convex part 15 is arranged on the side of the water retaining member 3 close to the convex part 15. A bent shrinkage joint 7 is formed between the concave part 14 and the convex part 15, a caulking assembly 8 is arranged inside the shrinkage joint 7, and a closing and sealing assembly 9 is arranged at the opening of the shrinkage joint 7.

[0046] Specific implementation manner: During use, first bury two connecting bases 2 tightly inside the pool wall body 1 in sequence, and make the two connecting bases 2 located on both sides of the expansion joint 5, and ensure that the water-facing end faces of the pedestals 4 on the connecting bases 2 are flush. After several connecting bases 2 are buried and installed, it is necessary to detect whether the water-facing end faces of the pedestals 4 on the water-facing ends of several connecting bases 2 are flush. Specifically, if the flatness error between the water-facing end faces of the pedestals 4 is less than or equal to 1.5 mm, it can be considered flush. If the flatness error is greater than 1.5 mm, the water-facing end faces of the pedestals 4 need to be ground. Then, connecting ribs and sealant 13 are applied on the water-facing surfaces of the connecting bases 2 on both sides of the pedestals 4. The sealant 13 ensures the sealing performance between the water-blocking member 3, the connecting base 2, and the pool wall body 1, so as to prevent the internal water source of the pool from entering between the water-blocking member 3, the connecting base 2, and the pool wall body 1 during the use of the pool. This will not only increase the corrosion phenomenon between the water-blocking member 3, the connecting base 2, and the pool wall body 1, but also affect the sealing performance between the expansion joint 5 and the integral strip-shaped rubber member 6, and further affect the repair effect of the expansion joint 5.

[0047] The caulking assembly 8 includes a bent caulking plate 801 and a straight caulking plate 802. The bent caulking plate 801 is arranged corresponding to the bent area of the shrinkage joint 7, and the straight caulking plate 802 is arranged corresponding to the straight area of the shrinkage joint 7. Both the bent caulking plate 801 and the straight caulking plate 802 are polyethylene foam plastic plates. Sealant is filled between the bent caulking plate 801 and the straight caulking plate 802, between the bent caulking plate 801 and the shrinkage joint 7, and between the straight caulking plate 802 and the shrinkage joint 7. A receiving groove 10 is arranged inside the shrinkage joint 7. The receiving groove 10 is arranged inside the water-blocking member 3 and is located above the concave portion 14 and the convex portion 15. A water stop 12 is arranged inside the receiving groove 10. The water stop 12 is located between the bent caulking plate 801 and the straight caulking plate 802. Two sealants 13 are arranged between the connecting base 2 and the water-blocking member 3. The two sealants 13 are symmetrically arranged on the outer peripheral side of the pedestal 4.

[0048] Specific implementation method: First, install the fastening component 11 on the end face of the water-facing end of the base 4, insert the convex part 15 of the fastening component 11 into the concave part 14 of the water-blocking component 3, so that a bent shrinkage joint 7 is formed between the convex part 15 and the concave part 14. Then, install the caulking component 8 in the bent area of the shrinkage joint 7, and fill the gap between the caulking component 8 and the shrinkage joint 7 with sealant. When filling the sealant, avoid the sealant from entering the accommodation groove 10. Install the water stop belt 12 between the accommodation groove 10 on the convex part 15 and the accommodation groove 10 on the concave part 14. After the water stop belt 12 is installed, grout in the accommodation groove 10. Finally, install the caulking component 8 in the straight area of the shrinkage joint 7, fill the gap between the caulking component 8 and the shrinkage joint 7 with sealant, and reserve an installation space at the opening of the shrinkage joint 7. And this water stop belt 12 is made of rubber water stop belt, and the thickness of the water stop belt 12 is greater than or equal to 8 mm. The elongation rate of the caulking component 8 is greater than or equal to 100%, and the water absorption rate is greater than or equal to 0.003 g / cm³. After the caulking component 8 is installed, it is required that the joint between the caulking component 8 and the shrinkage joint 7 is flat and firm, and it is further bonded and sealed with sealant to make the caulking component 8 firmly bonded to the shrinkage joint 7.

[0049] The closing and sealing component 9 includes a folding water-blocking rubber sleeve 901, a pressing sleeve 902, a pressing bolt 903 and an expansion bolt 904. The folding water-blocking rubber sleeve 901 is arranged at the opening of the shrinkage joint 7, and both ends of the folding water-blocking rubber sleeve 901 are fixed on the end face at the opening of the shrinkage joint 7 through the expansion bolt 904. The pressing sleeve 902 is buried inside the opening of the shrinkage joint 7. A pressing bolt 903 is installed inside the pressing sleeve 902 in a threaded manner. One end of the pressing bolt 903 is rotatably connected to the folding water-blocking rubber sleeve 901. An opening is provided on the folding water-blocking rubber sleeve 901, and an adapter sleeve is arranged in the opening. One end of the pressing bolt 903 passes through the inner hole of the adapter sleeve, and a seal is arranged between the pressing bolt 903 and the inner hole of the adapter sleeve. A base connection hole is provided on the water-facing end of the base 4, a connecting rib is arranged through the fastening component 11, and one end of the connecting rib extends into the base connection hole. A grouting port communicating with the base connection hole is also provided on the fastening component 11. At least one limiting and clamping part is arranged on the end face of the water-facing end of the connecting base 2 on both sides of the base 4, and a limiting groove corresponding to the limiting and clamping part is arranged on the end face of the water-blocking component 3 where it is joined with the connecting base 2.

[0050] Specific implementation method: Install the closing and sealing component 9 in the installation space at the opening of the shrinkage joint 7, block the opening of the shrinkage joint 7 through the closing and sealing component 9, and fill the gap between the closing and sealing component 9 and the opening of the shrinkage joint 7 and the gap between the closing and sealing component 9 and the end face of the opening of the shrinkage joint 7 with polymer solidifying seam glue. Finally, weld around the water-blocking component 3 and at the corners to ensure the stable connection and sealing between the water-blocking component 3, the connecting base 2 and the pool wall body 1.

[0051] A construction method for a repair structure of the water-facing expansion joint on the pool wall of a pool, comprising the following steps:

[0052] S1. First, two connecting bases 2 are successively and tightly embedded inside the connecting base 2, and the two connecting bases 2 are located on both sides of the expansion joint 5, and it is ensured that the water-facing end faces of the pedestals 4 on the connecting base 2 are flush;

[0053] S2. Connecting bars and sealant 13 are applied on the water-facing surfaces of the connecting base 2 on both sides of the pedestal 4. The water-blocking members 3 are symmetrically installed on both sides of the pedestal 4 through the connecting bars, and it is ensured that the water-facing surfaces of the water-blocking members 3 are flush. The sealant 13 is used to ensure the sealing performance between the water-blocking members 3, the connecting base 2 and the pool wall body 1;

[0054] S3. A fastening member 11 is installed on the water-facing end face of the pedestal 4, and the convex part 15 of the fastening member 11 is inserted into the concave part 14 of the water-blocking member 3, so that a bent shrinkage joint 7 is formed between the convex part 15 and the concave part 14;

[0055] S4. A caulking assembly 8 is embedded in the bent area of the shrinkage joint 7, and sealant is filled in the gap between the caulking assembly 8 and the shrinkage joint 7. When filling the sealant, it is avoided that the sealant infiltrates into the accommodation groove 10;

[0056] S5. A water stop 12 is embedded between the accommodation groove 10 on the convex part 15 and the accommodation groove 10 on the concave part 14. After the water stop 12 is embedded, grouting is carried out in the accommodation groove 10;

[0057] S6. A caulking assembly 8 is embedded in the straight area of the shrinkage joint 7, and sealant is filled in the gap between the caulking assembly 8 and the shrinkage joint 7, and an installation space is reserved at the opening of the shrinkage joint 7;

[0058] S7. A closing and sealing assembly 9 is embedded in the installation space at the opening of the shrinkage joint 7. The opening of the shrinkage joint 7 is blocked by the closing and sealing assembly 9, and polymer solidifying sealant is filled in the gap between the closing and sealing assembly 9 and the opening of the shrinkage joint 7 and the gap between the closing and sealing assembly 9 and the opening end face of the shrinkage joint 7. Finally, welding is carried out around and at the corners of the water-blocking member 3 to ensure the stable connection and sealing performance between the water-blocking member 3, the connecting base 2 and the pool wall body 1.

[0059] Working principle: When in use, first bury the two connecting bases 2 tightly in the inner part of the pool wall body 1 in sequence, and make the two connecting bases 2 located on both sides of the expansion joint 5, and ensure that the water-facing end faces of the pedestals 4 on the connecting bases 2 are flush. After several connecting bases 2 are buried and installed, it is necessary to detect whether the water-facing end faces of the pedestals 4 on the water-facing ends of several connecting bases 2 are flush. Specifically, if the flatness error between the water-facing end faces of the pedestals 4 is less than or equal to 1.5 mm, it can be considered flush. If the flatness error is greater than 1.5 mm, then the water-facing end faces of the pedestals 4 need to be ground. Then, apply connecting ribs and sealant 13 on the water-facing surfaces of the connecting bases 2 on both sides of the pedestal 4. Symmetrically install water-blocking members 3 on both sides of the pedestal 4 through the connecting ribs, and ensure that the water-facing surfaces of the water-blocking members 3 are flush. Repair the opening of the expansion joint 5 through the water-blocking members 3 and the strip-shaped rubber member 6, and the sealant 13 ensures the sealing performance between the water-blocking members 3, the connecting bases 2 and the pool wall body 1, so as to prevent the pool water from affecting the repair effect of the expansion joint 5 during the use of the pool;

[0060] Through the corresponding positioning and engagement of the limiting grooves on the water-blocking members 3 and the limiting engaging parts on the water-facing surfaces of the connecting bases 2, the rapid positioning of the water-blocking members 3 on the water-facing surfaces of the connecting bases 2 is realized. The connecting bases 2 and the water-blocking members 3 are connected and fixed through the connecting ribs. After the water-blocking members 3 are installed, detect the flatness error of the water-facing surfaces of the water-blocking members 3. If the flatness error between the water-facing end faces of the water-blocking members 3 is less than or equal to 1.5 mm, it can be considered flush. If the flatness error is greater than 1.5 mm, then the water-facing surfaces of the water-blocking members 3 need to be ground. Install a fastening member 11 on the water-facing end face of the pedestal 4, and insert the convex part 15 of the fastening member 11 into the concave part 14 of the water-blocking member 3, so that a bent shrinkage joint 7 is formed between the convex part 15 and the concave part 14. Then, install a caulking assembly 8 in the bent area of the shrinkage joint 7, and fill the gap between the caulking assembly 8 and the shrinkage joint 7 with sealant. When filling the sealant, avoid the sealant from entering the accommodation groove 10. The accommodation grooves 10 on the convex part 15 and the accommodation grooves 10 on the concave part 14 are embedded with a water stop 12. After the water stop 12 is embedded, grout is injected into the accommodation groove 10 to ensure the overall sealing performance of the product during use. Install a caulking assembly 8 in the straight area of the shrinkage joint 7, and fill the gap between the caulking assembly 8 and the shrinkage joint 7 with sealant, and reserve an installation space at the opening of the shrinkage joint 7. Then, install a closing and sealing assembly 9 in the installation space at the opening of the shrinkage joint 7. Seal the opening of the shrinkage joint 7 through the closing and sealing assembly 9, and fill the gap between the closing and sealing assembly 9 and the opening of the shrinkage joint 7 and the gap between the closing and sealing assembly 9 and the opening end face of the shrinkage joint 7 with a polymer seam-fixing glue. Finally, weld around the water-blocking members 3 and at the corners to ensure the stable connection and sealing performance between the water-blocking members 3, the connecting bases 2 and the pool wall body 1.

[0061] As described above, it is only the preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution of the present invention and its inventive concept, making equivalent substitutions or changes, should be covered by the protection scope of the present invention.

Claims

1. A repair structure for expansion joints on the water-facing surface of a pool wall, including a pool wall body (1), characterized in that: Inside the pool wall body (1), there is a expansion joint (5). Inside the opening of the expansion joint (5), a strip-shaped rubber part (6) is hermetically connected. On the side of the strip-shaped rubber part (6) away from the expansion joint (5), there is a water retaining part (3). On the water-facing end of the water retaining part (3), there are multiple base platforms (4). Multiple base platforms (4) are all located inside the water retaining part (3), and multiple base platforms (4) are symmetrically arranged on both sides of the expansion joint (5). On the side of the base platform (4) away from the water retaining part (3), there is a connecting matrix (2) fixedly connected. The connecting matrix (2) is embedded inside the pool wall body (1). On the side of the base platform (4) away from the connecting matrix (2), there is a fastening part (11). On the side of the fastening part (11) close to the water retaining part (3), there is at least one convex part (15). On the side of the water retaining part (3) close to the convex part (15), there is a concave part (14) that cooperates with the convex part (15). Between the concave part (14) and the convex part (15), there is a bent shrinkage joint (7). Inside the shrinkage joint (7), there is a caulking component (8). At the opening of the shrinkage joint (7), there is a closing and sealing component (9).

2. The expansion joint repair structure for the water-facing surface of the pool wall according to claim 1, characterized in that: The caulking component (8) includes a bent caulking plate (801) and a straight-section caulking plate (802). The bent caulking plate (801) is arranged corresponding to the bent area of the shrinkage joint (7). The straight-section caulking plate (802) is arranged corresponding to the straight area of the shrinkage joint (7). Both the bent caulking plate (801) and the straight-section caulking plate (802) are polyethylene foam plastic plates.

3. A repair structure for expansion joints on the water-facing surface of a pool wall according to claim 2, characterized in that: Sealant is filled between the bent caulking plate (801) and the straight-section caulking plate (802), between the bent caulking plate (801) and the shrinkage joint (7), and between the straight-section caulking plate (802) and the shrinkage joint (7).

4. A repair structure for expansion joints on the water-facing surface of a pool wall according to claim 3, characterized in that: Inside the shrinkage joint (7), there is a receiving groove (10). The receiving groove (10) is arranged inside the water retaining part (3), and the receiving groove (10) is located above the concave part (14) and the convex part (15). Inside the receiving groove (10), there is a water stop belt (12). The water stop belt (12) is located between the bent caulking plate (801) and the straight-section caulking plate (802).

5. The expansion joint repair structure for the water-facing surface of the pool wall according to claim 4, characterized in that: Between the connecting matrix (2) and the water retaining part (3), there are two sealants (13). The two sealants (13) are symmetrically arranged on the outer peripheral side of the base platform (4).

6. The expansion joint repair structure for the water-facing surface of the pool wall according to claim 5, wherein: The closing and sealing component (9) includes a folding water retaining rubber sleeve (901), a pressing sleeve (902), a pressing bolt (903), and an expansion bolt (904). The folding water retaining rubber sleeve (901) is arranged at the opening of the shrinkage joint (7), and both ends of the folding water retaining rubber sleeve (901) are fixed on the end face at the opening of the shrinkage joint (7) through the expansion bolt (904). The pressing sleeve (902) is embedded inside the opening of the shrinkage joint (7). Inside the pressing sleeve (902), the pressing bolt (903) is threadedly installed. One end of the pressing bolt (903) is rotatably connected to the folding water retaining rubber sleeve (901).

7. A repair structure for expansion joints on the water-facing surface of a pool wall according to claim 6, characterized in that: The folding water-blocking rubber sleeve (901) is provided with an opening, and an adapter sleeve is arranged in the opening. One end of the pressing bolt (903) passes through the inner hole of the adapter sleeve, and a sealing member is arranged between the pressing bolt (903) and the inner hole of the adapter sleeve.

8. A repair structure for expansion joints on the water-facing surface of a pool wall according to claim 1, characterized in that: The water-facing end of the base platform (4) is provided with a base platform connection hole. A connecting rib is penetrated through the fastening member (11), and one end of the connecting rib extends into the interior of the base platform connection hole. The fastening member (11) is further provided with a grouting port communicating with the base platform connection hole.

9. A repair structure for expansion joints on the water-facing surface of a pool wall according to claim 1, characterized in that: At least one limiting and clamping portion is arranged on both sides of the base platform (4) on the end surface of the water-facing end of the connecting base body (2). A limiting groove corresponding to the limiting and clamping portion is arranged on the end surface of the water-blocking member (3) that is joined with the connecting base body (2).

10. The construction method of the repair structure for the expansion joint on the water-facing surface of the pool wall according to any one of claims 1-9, characterized in that, It includes the following steps: S1. First, sequentially and closely embed the two connecting base bodies (2) inside the pool wall body (1), and make the two connecting base bodies (2) located on both sides of the expansion joint (5), and ensure that the end surfaces of the water-facing ends of the base platforms (4) on the connecting base bodies (2) are flush. S2. Apply the connecting rib and the sealing paste (13) on the water-facing surfaces of the connecting base body (2) on both sides of the base platform (4). Symmetrically install the water-blocking members (3) on both sides of the base platform (4) through the connecting rib, and ensure that the water-facing surfaces of the water-blocking members (3) are flush. Ensure the sealing performance between the water-blocking members (3), the connecting base body (2), and the pool wall body (1) through the sealing paste (13). S3. Install the fastening member (11) on the end surface of the water-facing end of the base platform (4), and insert the convex portion (15) of the fastening member (11) into the concave portion (14) of the water-blocking member (3), so that a bent shrinkage joint (7) is formed between the convex portion (15) and the concave portion (14). S4. Insert the caulking assembly (8) into the bent area of the shrinkage joint (7), and fill the gap between the caulking assembly (8) and the shrinkage joint (7) with sealant. Avoid the sealant from entering the accommodation groove (10) when filling the sealant. S5. Install the water stop belt (12) between the accommodation groove (10) on the convex portion (15) and the accommodation groove (10) on the concave portion (14). After the water stop belt (12) is installed, grout in the accommodation groove (10). S6. Insert the caulking assembly (8) into the straight area of the shrinkage joint (7), and fill the gap between the caulking assembly (8) and the shrinkage joint (7) with sealant, and reserve an installation space at the opening of the shrinkage joint (7). S7. Install the closing and sealing assembly (9) in the installation space at the opening of the shrinkage joint (7). Seal the opening of the shrinkage joint (7) through the closing and sealing assembly (9), and fill the gap between the closing and sealing assembly (9) and the opening of the shrinkage joint (7), and the gap between the closing and sealing assembly (9) and the opening end surface of the shrinkage joint (7) with high molecular solidifying seam glue. Finally, weld around the perimeter and at the corners of the water-blocking member (3) to ensure the stable connection and sealing performance between the water-blocking member (3), the connecting base body (2), and the pool wall body (1).

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