Subway construction underground passage anti-seepage structure and construction method

Abstract

This invention provides a seepage-proof structure and construction method for underground passages in subway construction, belonging to the technical field of underground passages in subway construction. The structure includes a base assembly, with multiple corner columns erected on the top corner of the base assembly away from the shield tunnel. A central column is erected next to each corner column in the middle of the base assembly. A shear wall assembly is cast on the side of the base assembly closest to the shield tunnel. Seepage-proof composite wall assemblies are sealed between the corner columns and the central column, and between the central column and the shear wall assembly. The other three walls are assembled from the corner columns, central column, and seepage-proof composite wall assemblies to form detachable walls. Multiple waterproofing layers are designed at the joints formed by the detachable walls. Furthermore, after use, the corner columns, central column, and seepage-proof composite wall assemblies can be directly dismantled, recycled, and reused during station / entrance expansion, saving time and labor, and preventing construction waste, effectively reducing construction costs.

Description

Technical Field

[0001] This invention relates to a seepage-proof structure and construction method for underground passages in subway construction, belonging to the technical field of underground passages in subway construction. Background Technology

[0002] When excavating subway tunnels, an underground open-cut tunnel must first be built to facilitate the subsequent construction of the shield tunnel. This open-cut tunnel can also be used for the expansion of subsequent stations / entrances. After the open-cut tunnel is completed, a seepage-proof partition wall structure and a waterproof bedding layer need to be constructed. Existing seepage-proof partition wall structures typically use directly cast concrete shear walls for seepage prevention. While concrete shear walls offer good seepage prevention, a serious problem exists: when constructing stations / entrances, only the concrete shear walls closest to the shield tunnel can be used directly, while the other three concrete shear walls need to be demolished and rebuilt, which is time-consuming, labor-intensive, increases construction material costs, and generates construction waste. To address these shortcomings, this invention proposes a seepage-proof structure and construction method for underground subway tunnels. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a seepage-proof structure and construction method for underground passages in subway construction, so as to solve the existing problems.

[0004] To achieve the above objectives, the present invention is implemented through the following technical solution: a seepage-proof structure for underground passages in subway construction, the structure including a base platform assembly, wherein multiple corner columns are erected on the top corner of the base platform assembly away from the shield tunnel, and a central column is erected in the middle of the base platform assembly next to each corner column; a shear wall assembly is cast on the side of the base platform assembly close to the shield tunnel; and seepage-proof combined wall assemblies are sealed between the corner columns and the central column and between the central column and the shear wall assembly.

[0005] Each of the aforementioned anti-seepage combined wall groups includes multiple bottom wall groups, and the top wall group is sealed with a top wall group on the top surface of the top bottom wall group, and a pressure beam group is pressed against the top surface of the top wall group to compress the top wall group and each bottom wall group after they are assembled.

[0006] Multiple water collection wells are spaced apart on the inner periphery of the base assembly, and a waterproof cushion layer is poured on the bottom surface of the channel inside the base assembly. The waterproof cushion layer is a C15-C20 concrete structure.

[0007] When each of the aforementioned anti-seepage combined wall assemblies is fitted together between the corner columns, the middle columns, and the shear wall assembly, a fitting joint will be formed at the corner. Multiple water-swellable adhesive strips are fitted into the gaps on the front and back sides of each fitting joint for filling, and the cavity of each fitting joint is filled with epoxy resin for anti-seepage treatment.

[0008] A further improvement is that the base assembly includes a concrete base body, and the top surface of the concrete base body is provided with multiple column slots spaced apart. The top surface of the concrete base body is also provided with multiple first adhesive strip slots spaced apart horizontally and vertically. Each first adhesive strip slot is fitted with a first wall joint strip. Multiple water collection troughs are spaced apart on the top surface of the concrete base body near each of the water collection wells. A drainage pipe extending to the top of the water collection well is pre-embedded between the bottom of two adjacent water collection troughs. Multiple first partition strips are fitted at intervals between the first wall joint strips.

[0009] A further improvement is that each of the corner pillar components includes a base that is flush-fitted into the pillar groove by being sealed and filled with waterproof adhesive. A pillar is vertically welded to the top surface of the base, and two first wall sliding grooves are opened on the side of the pillar. The base has multiple first adhesive strip splicing grooves that correspond one-to-one with the first adhesive strip grooves at the first wall sliding grooves. A first grouting port is opened in the middle of the inner groove wall of the first wall sliding groove. The corner pillar component is made of steel structure material. Each of the corner pillar components has the same structure as each of the central pillar components, but the opening direction of the first wall sliding groove is different.

[0010] A further improvement is that two sleeve wall channels are vertically pre-embedded and cast on the inner sides of the front and rear ends of the shear wall group, while a shield tunneling opening is provided at the lower middle part of the shear wall group.

[0011] The inner sides of the two wall channel steels are provided with a second wall sliding groove, and the lower groove wall of the second wall sliding groove is provided with a second rubber strip splicing groove that corresponds to and communicates with the first rubber strip groove. The middle of the inner groove wall of the second wall sliding groove is provided with a second grouting port.

[0012] A further improvement is that each of the aforementioned base wall assemblies includes a concrete base wall body, and the top surface of the concrete base wall body is provided with two drainage ditches spaced apart. The two drainage ditches are connected at their ends to form drainage channels that communicate with two water collection tanks in the same group. Multiple second rubber strip grooves are provided on the sides of the two drainage ditches, and a second wall joint strip is fitted inside each second rubber strip groove. Multiple second partition strips are fitted at intervals between the ends of each second wall joint strip. Multiple first lifting hooks are pre-embedded and cast at intervals on the side walls of the concrete base wall body. The concrete used for the concrete base wall body is C50 concrete.

[0013] A further improvement is that the top wall assembly includes a concrete top wall body, and multiple second lifting hooks are pre-embedded and cast at intervals on the side walls of the concrete top wall body. The concrete used in the concrete top wall body is C50.

[0014] A further improvement is that each of the pressure beam assemblies includes a beam body, and multiple screw rods are threadedly connected to the beam body at intervals. Each screw rod has a rotating seat fitted at its lower end. A pressure plate is provided on the bottom surface of the rotating seat, and multiple support slide rods for passing through the beam body are provided at intervals on the top surface of the pressure plate.

[0015] A further improvement is that the first wall joint strip, the first partition strip, the second wall joint strip, and the second partition strip are all made of water-swellable adhesive strip material.

[0016] Furthermore, this invention also provides a construction method for the aforementioned anti-seepage structure of an underground passage in subway construction, the construction method being as follows:

[0017] After the open-cut tunnel required for subway construction is excavated, a concrete foundation needs to be poured around the bottom of the tunnel, and various water collection wells need to be dug. A waterproof cushion layer also needs to be poured at the bottom of the tunnel to achieve waterproofing of the tunnel foundation.

[0018] Then, shear wall assemblies are integrally cast on the concrete foundation body that serves as the tunnel tunnel, and corresponding wall channel steel is pre-embedded in advance.

[0019] Then, sealant is filled into the column slots, and the corner and middle column components are installed vertically, so that the spacing between the corner and middle column components and the spacing between the middle column component and the wall channel steel are exactly matched with the waterproof composite wall assembly.

[0020] Then, the first wall joint strip and the first partition strip are installed between each first adhesive strip groove and each first adhesive strip splicing groove, and between each first adhesive strip groove and each second adhesive strip splicing groove, to waterproof and seal the bottom wall joint.

[0021] Then, each anti-seepage combination wall group is installed sequentially between the corresponding corner column and the middle column, and between the middle column and the wall channel steel. After each anti-seepage combination wall group is installed, it will form various joints. When the height of the anti-seepage combination wall group is increased, the water-swellable rubber strips need to be filled and sealed on both sides of the joints.

[0022] Finally, epoxy resin is injected into the joint to fill and seal the gap, completing the construction.

[0023] The beneficial effects of this invention are:

[0024] This invention provides a seepage-proof structure and construction method for underground passages used in subway construction. The structure comprises a base assembly, corner columns, central columns, shear walls, bottom walls, top walls, pressure beams, a sump, a waterproof layer, and water-swellable rubber strips. The walls near the tunnel boring machine (TBM) are constructed using shear walls, allowing for direct reuse without demolition. The other three walls are assembled from corner columns, central columns, and seepage-proof composite wall assemblies to form detachable walls. The joints formed by these detachable walls are designed to prevent seepage. The design incorporates multiple waterproofing layers, ensuring that the resulting joints are completely leak-proof. The walls formed by the assembled waterproof wall modules are treated with multiple layers of waterproof partitions. In addition, drainage structures are designed on each base wall and platform to prevent water from seeping into the wall joints and accumulating, allowing for timely drainage and improving the leak-proof performance of the wall joints. Furthermore, when the corner and central columns are used with the waterproof wall modules, they can be directly removed and recycled during the expansion of the station / entrance, saving time and effort, and generating no construction waste, effectively reducing construction costs. Attached Figure Description

[0025] Figure 1 This is a top view of a seepage-proof structure for underground passages in subway construction according to the present invention;

[0026] Figure 2 This is a partial top view of the anti-seepage structure of an underground passage for subway construction according to the present invention;

[0027] Figure 3 This is a partial front view of a seepage-proof structure for underground passages in subway construction according to the present invention;

[0028] Figure 4 For the present invention Figure 1 Enlarged view of part A in the image;

[0029] Figure 5 This is a schematic diagram of the base assembly structure of the present invention;

[0030] Figure 6 This is a schematic diagram of the corner column and the middle column of the present invention;

[0031] Figure 7 This is a schematic diagram of the shear wall assembly structure of the present invention;

[0032] Figure 8 This is a schematic diagram of the bottom wall assembly and top wall assembly of the present invention;

[0033] Figure 9 This is a schematic diagram of the pressure beam assembly structure of the present invention. Detailed Implementation

[0034] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0035] Please see Figures 1-9 This invention provides a seepage-proof structure and construction method for underground passages used in subway construction: The structure includes a base assembly 1, with multiple corner columns 2 erected on the top corner of the base assembly 1 away from the tunnel boring machine (TBM). A central column 3 is erected in the middle of the base assembly 1 next to each corner column 2. A shear wall assembly 4 is cast on the side of the base assembly 1 closest to the TBM. Seepage-proof combined wall assemblies are sealed between the corner columns 2 and the central column 3, and between the central column 3 and the shear wall assembly 4. Each seepage-proof combined wall assembly includes multiple bottom wall assemblies 5, and a top wall assembly 6 is sealed on the top surface of the top bottom wall assembly 5. The top surface is pressed against a pressure beam assembly 7, which compresses the top wall assembly 6 and each bottom wall assembly 5 after they are assembled. Multiple water collection wells 8 are spaced apart on the inner perimeter of the base assembly 1. A waterproof pad 9 is poured on the bottom surface of the channel inside the base assembly 1. The waterproof pad 9 is a C15-C20 concrete structure. When each of the anti-seepage combined wall assemblies is assembled between the corner column 2, the middle column 3 and the shear wall assembly 4, a fitting joint a1 will be formed at the corner. Multiple water-swellable rubber strips 10 are installed in the gaps on the front and back sides of each fitting joint a1 to fill the gaps. The cavity of each fitting joint a1 is filled with epoxy resin for anti-seepage treatment.

[0036] The base assembly 1 includes a concrete base body 11, and the top surface of the concrete base body 11 is provided with a plurality of column slots 12 spaced apart. The top surface of the concrete base body 11 is also provided with a plurality of first adhesive strip slots 13 spaced apart horizontally and vertically. Each first adhesive strip slot 13 is fitted with a first wall joint strip 14. The top surface of the concrete base body 11 near each of the water collection wells 8 is provided with a plurality of water collection troughs 15 spaced apart. The bottom of two adjacent water collection troughs 15 is connected by a pre-embedded drain pipe 16 extending to the top of the water collection well 8. Each first wall joint strip 14 is fitted with a plurality of first partition strips 17 spaced apart from end to end.

[0037] Each of the corner column components 2 includes a base 21 that is flush-fitted into the column groove 12 by sealing and filling with waterproof adhesive. A column 22 is vertically welded to the top surface of the base 21, and two first wall sliding grooves 23 are opened on the side of the column 22. A plurality of first adhesive strip splicing grooves 24 are opened on the base 21 corresponding to the first wall sliding grooves 23 and communicating one-to-one with the first adhesive strip grooves 13. A first grouting port 25 is opened in the middle of the inner groove wall of the first wall sliding groove 23. The corner column component 2 is made of steel structure. Each of the corner column components 2 and each of the central column components 3 have the same structure, but the opening direction of the first wall sliding grooves 23 is different.

[0038] Two sleeve wall channel steels 41 are vertically embedded and cast on the inner sides of the front and rear ends of the shear wall group 4, and a shield tunnel opening 4 is opened at the lower middle part of the shear wall group 4. A second sleeve wall sliding groove 411 is opened on the inner side of the two sleeve wall channel steels 41, and a second rubber strip splicing groove 412 is opened on the lower groove wall of the second sleeve wall sliding groove 411, which corresponds to and communicates with the first rubber strip groove 13. A second grouting port 413 is opened in the middle of the inner groove wall of the second sleeve wall sliding groove 411.

[0039] Each of the aforementioned base wall groups 5 includes a concrete base wall body 51, and the top surface of the concrete base wall body 51 is provided with two drainage ditches 52 spaced apart. The two drainage ditches 52 are connected at their ends by drainage channels 53 that communicate with two water collection tanks 15 in the same group. Multiple second rubber strip grooves 54 are provided on the sides of the two drainage ditches 52, and a second wall joint strip 55 is fitted inside each second rubber strip groove 54. Multiple second partition strips 56 are fitted at their ends between each second wall joint strip 55. Multiple first lifting hooks 57 are pre-embedded and cast at intervals on the side wall of the concrete base wall body 51. The concrete type used for the concrete base wall body 51 is C50.

[0040] The top wall assembly 6 includes a concrete top wall body 61, and multiple second lifting hooks 62 are pre-embedded and cast at intervals on the side wall of the concrete top wall body 61. The concrete used in the concrete top wall body 61 is C50.

[0041] Each of the pressure beam assemblies 7 includes a beam body 71, and a plurality of screw rods 72 are threadedly connected to the beam body 71 at intervals. Each screw rod 72 is fitted with a rotating seat 73 at its lower end. A pressure plate 74 is provided on the bottom surface of the rotating seat 73, and a plurality of support slide rods 75 for passing through the beam body 71 are provided at intervals on the top surface of the pressure plate 74.

[0042] Working principle:

[0043] After the open-cut tunnel required for subway construction is excavated, a concrete foundation body 11 needs to be poured around the bottom of the tunnel, and various water collection wells 8 need to be dug. A waterproof cushion layer 9 needs to be poured at the bottom of the tunnel to achieve waterproof treatment of the tunnel foundation.

[0044] When the concrete base body 11 is poured, the column sleeve 12, the first rubber strip sleeve 13, and the water collection tank 15 are all constructed together, and a drainage pipe 16 is pre-embedded at the bottom of the water collection tank 15.

[0045] Then, shear wall assembly 4 is integrally cast on the concrete base body 11 in the direction of the shield tunnel, and the corresponding wall channel steel 41 is pre-embedded.

[0046] When shear wall group 4 is poured, a shield tunnel opening 4 will be constructed together.

[0047] Then, sealant is filled into the column sleeve groove 12 and the corner column 2 and the middle column 3 are installed vertically, so that the distance between the corner column 2 and the middle column 3, and the distance between the middle column 3 and the wall channel steel 41 are exactly matched with the anti-seepage combined wall assembly.

[0048] When installing the base 21, expansion bolts are used for locking. After the base 21 is installed in the column sleeve groove 12, the top surface of the base 21 is horizontally aligned with the top surface of the concrete base body 11. The gaps around the column sleeve groove 12 are filled with sealant to prevent water seepage.

[0049] Then, the first wall joint strip 14 and the first partition strip 17 are installed between each first adhesive strip groove 13 and each first adhesive strip splicing groove 24, and between each first adhesive strip groove 13 and each second adhesive strip splicing groove 412 to waterproof and seal the bottom wall joint.

[0050] Then, between the corresponding corner column 2 and the middle column 3, and between the middle column 3 and the wall channel steel 41, each anti-seepage combination wall group is installed in sequence. After each anti-seepage combination wall group is installed, each fitting joint a1 will be formed. When the height of the anti-seepage combination wall group is increased, the water-swellable rubber strip 10 needs to be filled and sealed on both sides of the fitting joint a1.

[0051] When each concrete base wall body 51 is hoisted, the second wall joint strip 55 and the second partition strip 56 need to be pre-installed in the second rubber strip groove 54. After the beam body 71 is installed, by rotating the screw 72, the pressure plate 74 can be lowered to press against the top surface of the concrete top wall body 61. In addition to their own weight pressing down on the first wall joint strip 14, the first partition strip 17, the second wall joint strip 55, and the second partition strip 56 to seal, each concrete base wall body 51 and concrete top wall body 61 can also provide additional downward pressure through the pressure plate 74, so that the first wall joint strip 14, the first partition strip 17, the second wall joint strip 55, and the second partition strip 56 can seal each wall joint more tightly.

[0052] Finally, epoxy resin is injected into the fitting joint a1 to fill and seal the gap, completing the construction.

[0053] The joint a1 will first be filled with water-swellable adhesive strip 10 to fill the gaps between the front and back. The first partition strip 17 and the second partition strip 56 will act as a partition in the width direction of the wall joint, so that when epoxy resin is injected into the joint a1, there will be no outflow or flow into the drainage ditch 52, which will facilitate the complete sealing and filling of the joint a1.

[0054] The underground open-cut tunnel anti-seepage structure of the present invention, when in use, will not have water seepage problems because the fitting joint a1 is double-sealed by the water-swellable adhesive strip 10 and epoxy resin. The wall joints formed after the anti-seepage composite wall assembly is fitted are all sealed and isolated by multiple rows of first wall joint strips 14 and multiple rows of second wall joint strips 55 through water-swellable sealing. In addition, if water seeps from the outside to the inside of the multiple rows of first wall joint strips 14 and second wall joint strips 55, the seepage water will flow into the drainage ditch 52, and then flow down into the water collection tank 15 through the drainage channel 53, and then into the water collection well 8 through the drainage pipe 16. The above-mentioned multiple waterproof sealing isolation of the wall joints and the opening of the drainage channel in the middle of the wall joint can prevent the seepage water from continuing to seep inward and accumulate when water seeps in the middle of the wall joint, and can be discharged in time, thus improving the anti-seepage performance of the wall joints of the anti-seepage composite wall assembly.

[0055] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0056] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A seepage-proof structure for underground passages in subway construction, characterized in that: Its structure includes a base assembly, and multiple corner columns are erected on the top corner of the base assembly away from the shield tunnel. A central column is erected in the middle of the base assembly next to each corner column. A shear wall assembly is cast on the side of the base assembly close to the shield tunnel. A seepage-proof composite wall assembly is sealed between the corner columns and the central column, and between the central column and the shear wall assembly. Each of the aforementioned anti-seepage combined wall groups includes multiple bottom wall groups, and the top wall group is sealed with a top wall group on the top surface of the top bottom wall group, and a pressure beam group is pressed against the top surface of the top wall group to compress the top wall group and each bottom wall group after they are assembled. Multiple water collection wells are spaced apart on the inner periphery of the base assembly, and a waterproof cushion layer is poured on the bottom surface of the channel inside the base assembly. The waterproof cushion layer is a C15-C20 concrete structure. When each of the aforementioned anti-seepage combined wall assemblies is fitted together between the corner columns, the middle columns, and the shear wall assembly, a fitting joint will be formed at the corner. Multiple water-swellable adhesive strips are fitted into the gaps on the front and back sides of each fitting joint for filling, and the cavity of each fitting joint is filled with epoxy resin for anti-seepage treatment.

2. The anti-seepage structure for underground passages in subway construction according to claim 1, characterized in that: The base assembly includes a concrete base body, and the top surface of the concrete base body is provided with multiple column slots spaced apart. The top surface of the concrete base body is also provided with multiple first adhesive strip slots spaced apart horizontally and vertically. Each first adhesive strip slot is fitted with a first wall joint strip. Multiple water collection troughs are spaced apart on the top surface of the concrete base body near each of the water collection wells. A drainage pipe extending to the top of the water collection well is pre-embedded between the bottom of two adjacent water collection troughs. Multiple first partition strips are fitted at intervals between the first wall joint strips.

3. The anti-seepage structure for underground passages in subway construction according to claim 2, characterized in that: Each of the corner support members includes a base that is flush-fitted into the support groove by being sealed and filled with waterproof adhesive. A support is vertically welded to the top surface of the base, and two first set wall sliding grooves are opened on the side of the support. The base has multiple first adhesive strip splicing grooves that correspond one-to-one with the first adhesive strip grooves. A first grouting port is opened in the middle of the inner wall of the first set wall sliding groove. The corner support member is made of steel structure. Each of the corner support members has the same structure as each of the central support members, but the opening direction of the first set wall sliding groove is different.

4. The anti-seepage structure for underground passages in subway construction according to claim 3, characterized in that: The shear wall assembly has two vertically embedded and cast wall channel steels on the inner sides of both the front and rear ends, and a shield tunneling opening is provided at the lower middle part of the shear wall assembly. The inner sides of the two wall channel steels are provided with a second wall sliding groove, and the lower groove wall of the second wall sliding groove is provided with a second rubber strip splicing groove that corresponds to and communicates with the first rubber strip groove. The middle of the inner groove wall of the second wall sliding groove is provided with a second grouting port.

5. The anti-seepage structure for underground passages in subway construction according to claim 4, characterized in that: Each of the aforementioned base wall assemblies includes a concrete base wall body, and the top surface of the concrete base wall body is provided with two drainage ditches spaced apart. The two drainage ditches are connected at their ends to form drainage channels that communicate with two water collection tanks in the same group. Multiple second rubber strip grooves are provided on the sides of the two drainage ditches, and a second wall joint strip is fitted inside each second rubber strip groove. Multiple second partition strips are fitted at intervals between the ends of each second wall joint strip. Multiple first lifting hooks are pre-embedded and cast at intervals on the side walls of the concrete base wall body. The concrete used for the concrete base wall body is C50 concrete.

6. The anti-seepage structure for underground passages in subway construction according to claim 5, characterized in that: The top wall assembly includes a concrete top wall body, and multiple second lifting hooks are pre-embedded and cast at intervals on the side walls of the concrete top wall body. The concrete used in the concrete top wall body is C50.

7. A seepage-proof structure for underground passages in subway construction according to claim 6, characterized in that: Each of the pressure beam assemblies includes a beam body, and multiple screw rods are threadedly connected to the beam body at intervals. Each screw rod has a rotating seat fitted at its lower end. A pressure plate is provided on the bottom surface of the rotating seat, and multiple support slide rods for passing through the beam body are provided at intervals on the top surface of the pressure plate.

8. A construction method for an anti-seepage structure for underground passages in subway construction, as described in claim 7, characterized in that: The construction method is as follows: After the open-cut tunnel required for subway construction is excavated, a concrete foundation needs to be poured around the bottom of the tunnel, and various water collection wells need to be dug. A waterproof cushion layer also needs to be poured at the bottom of the tunnel to achieve waterproofing of the tunnel foundation. Then, shear wall assemblies are integrally cast on the concrete foundation body that serves as the tunnel tunnel, and corresponding wall channel steel is pre-embedded in advance. Then, fill the column slot with sealant and install the corner column pieces and the middle column piece vertically, so that the distance between the corner column pieces and the middle column piece, and the distance between the middle column piece and the wall channel steel, are exactly compatible with the anti-seepage combined wall assembly. Then, the first wall joint strip and the first partition strip are installed between each first adhesive strip groove and each first adhesive strip splicing groove, and between each first adhesive strip groove and each second adhesive strip splicing groove to waterproof and seal the bottom wall joint. Then, between the corresponding corner column and the middle column, and between the middle column and the wall channel steel, each set of anti-seepage combination wall group is installed in sequence. After each set of anti-seepage combination wall group is installed, each joint will be formed. When the height of the anti-seepage combination wall group is increased, the water-swellable rubber strip needs to be filled and sealed on both sides of the joint. Finally, epoxy resin is injected into the joint to fill and seal the gap, completing the construction.

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