A method for repairing a deformation joint of a concrete structure

Abstract

The application relates to a concrete structure deformation joint repairing construction method, which comprises the following steps: cleaning the deformation joint and carrying out grouting and plugging on a water leakage position; cutting a sealing groove at the opening of the deformation joint, coating waterproof mortar on the opposite groove walls of the sealing groove; installing a sealing strip into the sealing groove and injecting water-swelling water-stopping glue into the sealing groove; installing a water-swelling rubber water-stopping strip into the sealing groove and pressing the water-swelling water-stopping glue; pressing a rigid long strip on the water-swelling rubber water-stopping strip; arranging a plurality of planted reinforcing bars on the side walls of the sealing groove; pouring repairing slurry into the sealing groove, so that the water-swelling rubber water-stopping strip and the rigid long strip are covered by the repairing slurry; fixing a waterproof assembly on the surface of the concrete structure, and the waterproof assembly covers the sealing groove. The multilayer sealing structure is cooperatively arranged in the sealing groove, and the multilayer structure is comprehensively limited by elastic materials, glue materials and rigid materials, so that the multilayer sealing structure can adapt to the deformation state of different deformation joints.

Description

Technical Field

[0001] This invention relates to the field of construction measures for existing buildings, and in particular to a construction method for repairing deformation joints in concrete structures. Background Technology

[0002] After a building has been in use for a period of time, deformation will occur in the concrete structure of the building due to changes in the surrounding soil. When the deformation joint is a seismic joint, expansion joint, or settlement joint, the deformation joint will be affected by factors such as uneven settlement of the building and thermal expansion and contraction, which will lead to leakage after the rubber waterstop is torn. Because the deformation joint will continuously change with the changes in the surrounding soil, such as increased vertical misalignment, larger joint spacing, and other changes in the state of the deformation joint, especially when the deformation joint is stretched to the centimeter level in the vertical and horizontal directions, the repair and sealing of leaks is extremely difficult.

[0003] Therefore, repairing leaks in expansion joints requires consideration not only of the current leak-sealing and repair work, but also of the durability of the waterproofing material and the ability of the expansion joint to maintain its sealing effect during subsequent continuous deformation. Existing leak repair methods include the following steps: 1. Remove the drainage channels on both sides of the expansion joint and perform preliminary cleaning of the entire base surface of the expansion joint.

[0004] 2. Perform a deep cleaning of the inside of the gaps to thoroughly remove laitance, debris, and accumulated dirt, ensuring the cleanliness of the substrate inside the gaps.

[0005] 3. Based on the embedment depth of the rubber waterstop and the width of the settlement joint, accurately determine the hole positions and carry out drilling operations at both ends of the expansion joint.

[0006] 4. First, temporarily seal the joint with quick-setting waterproof sealant; after the water pressure inside the joint has significantly decreased and there is no large amount of water seepage, inject cement water glass into the outside of the waterstop to fully fill all the gaps on the outside of the waterstop. Maintain stable grouting pressure and continue to inject cement water glass grout into the outside of the expansion joint to tightly seal the gap between the original waterproof layer and the reinforced concrete structural slab, completely blocking the interlayer water seepage channels.

[0007] 5. After the outer grouting is completed, polyurethane foam is injected into the inner side of the expansion joint to completely cover the rubber waterstop. This material has the property of foaming when it comes into contact with water, which can fully fill the gaps on both sides of the waterstop and penetrate and seal the tiny cracks in the surrounding structure, so that the expansion joint and the surrounding structure form an integral and dense waterstop system to achieve the goal of structural waterproofing.

[0008] 6. After cleaning the base surface inside the expansion joint groove, roughen and repair both sides to make it smooth; 7. Install embedded waterproof sealing strips in the expansion joints; 8. Apply water-swellable sealant to the surface of the compacted sealing strip inside the joint; 9. Insert water-swellable rubber waterstop strips into the expansion joint, ensuring that the waterstop strips are tightly installed; then press and fix the waterstop strips on the outside.

[0009] 10. Use acrylic emulsion waterproof slurry to bond the impermeable membrane to complete the overall waterproof reinforcement and surface protection construction.

[0010] 11. Inject polyurea waterproofing material into the inside of the impermeable membrane.

[0011] However, when the subsequent deformation exceeds the deformation extension index of the existing waterproof design structure, leakage and water leakage will still occur in the expansion joint. Summary of the Invention

[0012] To overcome the problems existing in related technologies, this invention provides a method for repairing expansion joints in concrete structures, which solves the technical problem that the expansion joints still leak and bleed when the expansion joints change size after the structure has poor extensibility.

[0013] According to a first aspect of the present invention, a method for repairing expansion joints in concrete structures is provided, the method comprising: Clean the expansion joints and seal the leaking areas by grouting the cavity on the back side; The opening of the expansion joint is chiseled and shaped into a sealing groove with a preset depth and width, and waterproof mortar is applied to the opposite sides of the groove. The sealing strip is inserted into the sealing groove, and water-swellable sealant is injected into the sealing groove, the water-swellable sealant covering the surface of the sealing strip and part of the groove wall. Insert the water-swellable rubber waterstop strip into the sealing groove and press it with the water-swellable waterstop adhesive; A rigid strip is pressed onto the water-swellable rubber waterstop strip, and multiple reinforcing bars are provided on the side wall of the sealing groove. The multiple reinforcing bars constrain the rigid strip to fit the water-swellable rubber waterstop strip. Pour repair grout into the sealing groove, and cover the water-swellable rubber waterstop strip and rigid strip with the repair grout. A waterproof component is fixed to the surface of a concrete structure, the waterproof component covering the sealing groove.

[0014] In one embodiment, cleaning the expansion joint and grouting the leaking area includes: Grouting nozzles are installed at preset intervals along the expansion joint, and valves are installed at the ends of the grouting nozzles; Drill through the expansion joint with a long drill bit along the grouting nozzle until water flows out of the corresponding area of ​​the expansion joint, then close the valve. The grouting equipment is connected to the corresponding grouting nozzle to fill the cavity of the expansion joint with grout multiple times.

[0015] In one embodiment, the step of repeatedly grouting and filling the cavity portion of the expansion joint by connecting the grouting device to the grouting nozzle includes: Connect the grouting pipe of the dual-pipe machine to the grouting nozzle; the dual-pipe machine uses a mixture of water glass and cement for grouting, and the cement slurry is mixed evenly as the grouting material. Grouting is performed on the grouting nozzle, with the grouting pressure controlled between 0.5MPa and 2.5MPa. Grouting is paused when the grouting pressure reaches the preset value, and grouting is resumed when the grouting pressure is lower than the preset value. This process is repeated multiple times.

[0016] In one embodiment, an acrylic copolymer emulsion is added to the waterproof mortar.

[0017] In one embodiment, the water-swellable sealant covers the surface of the sealing strip and part of the groove wall of the sealing groove, including: Fill the sealing groove with the first thickness of water-swellable sealant and cover the surface of the sealing strip; The preset curing time for water-swellable sealing adhesive is determined by the following parameters; Fill the sealing groove with the second thickness of water-swellable sealant and cover it with the cured water-swellable sealant strip.

[0018] In one embodiment, the expansion ratio of the water-swellable rubber waterstop strip is 200%-300%.

[0019] In one embodiment, fixing the waterproof component to the surface of the concrete structure includes: A polymer waterproof membrane is laid around the perimeter of the sealing groove, and the two sides of the polymer waterproof membrane are sealed to the surface of the concrete structure. A stainless steel plate is fixed to a concrete structure and covered with a polymer waterproof membrane. The stainless steel plate has at least a partially bent deformation zone corresponding to the sealing groove.

[0020] In one embodiment, the elongation of the polymer waterproof membrane is greater than or equal to 200%.

[0021] In one embodiment, acrylic emulsion is applied to the peripheral surface of the sealing groove. The acrylic emulsion is made by mixing acrylic copolymer emulsion with cement to form a gel. The repair grout is a polyurea grout.

[0022] In one embodiment, the concrete structure is provided with inclined grouting holes that extend to the sealing strip.

[0023] The technical solutions provided by the embodiments of the present invention can include the following beneficial effects: the sealing strip compresses and seals the bottom of the sealing groove, possessing resistance to bending and torsion. The water-swellable sealing adhesive can swell upon contact with water, achieving a leak-proof seal. The expansion of the water-swellable rubber sealing strip can be achieved by pressing it with a rigid strip, which is rigidly limited by rebar, thereby completing the pre-compression and limiting effect and improving elastic performance. The repair grout and waterproof components can achieve elastic deformation, adapting to the deformation of the expansion joint within a certain range. The sealing groove employs a multi-layered sealing structure, and the multi-layered structure is comprehensively limited by elastic, colloidal, and rigid materials, adapting to different deformation states of the expansion joint, maintaining good leak-proof performance even with a suitable range of dimensional changes in the expansion joint. Attached Figure Description

[0024] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0025] Figure 1 This is a flowchart illustrating a construction method according to an embodiment.

[0026] Figure 2 This is an enlarged cross-sectional view of an embodiment showing a sealing groove corresponding to an expansion joint.

[0027] Figure 3 This is a cross-sectional enlarged schematic diagram illustrating a rigid strip of rebar compression according to an embodiment.

[0028] Figure 4 This is a cross-sectional enlarged schematic diagram showing the sealing groove of a waterproof component according to one embodiment.

[0029] In the diagram, 10 is concrete structure; 11 is expansion joint; 12 is sealing groove; 13 is waterproof mortar; 14 is grouting hole; 20 is grouting material; 30 is sealing strip; 40 is water-swellable waterproof sealant; 50 is water-swellable rubber waterproof strip; 60 is rigid strip; 70 is rebar anchoring; 80 is repair grout; 90 is waterproof component; 91 is stainless steel plate; and 92 is polymer impermeable membrane waterproof roll. Detailed Implementation

[0030] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual images, and should not be construed as limiting the invention. It is understandable that some well-known structures and their descriptions may be omitted in the drawings for those skilled in the art.

[0031] like Figures 1 to 4 As shown, the present invention provides a construction method for repairing deformation joints in concrete structures. The deformation joint 11 changes in width and / or width direction with the size of the gap. This construction method can adapt to the changes in deformation joint 11 and maintain the leak-stopping function.

[0032] The construction method includes the following steps: Step S101: Clean the expansion joint 11 and grout the leaking area; clean the debris, loose concrete and garbage around and inside the expansion joint 11. Preferably, curtain grouting is performed on the leaking area of ​​the expansion joint 11 to perform bottom layer sealing treatment of the expansion joint 11.

[0033] Along the extension direction of the expansion joint 11, grouting nozzles are installed at predetermined intervals. Valves are installed at the ends of the grouting nozzles. The grouting nozzles can guide water out of the expansion joint or guide grouting fluid into the expansion joint 11 to seal it. Optionally, the grouting nozzles are spaced 0.8m-1.5m apart along the length, allowing for multi-point grouting to improve efficiency and enabling zoned grouting to enhance the stability of grout diffusion. For example, grouting nozzles are spaced 1m apart along the length to optimize the grouting effect.

[0034] The long drill bit is used to drill through the expansion joint 11 along the grouting nozzle until water flows out of the corresponding area of ​​the expansion joint 11, after which the valve is closed. The valve is an openable ball valve structure. When the valve is rotated to its opening angle, the long drill bit can pass through the valve and drill a hole in the area where the grouting nozzle is installed.

[0035] By connecting grouting nozzles to the grouting equipment, the cavity of the expansion joint 11 is filled with grout multiple times. Multiple grouting operations on the expansion joint 11 by the grouting equipment maintain grout stability, eliminate voids in the concrete, and improve the completeness of the filling.

[0036] Furthermore, the grouting pipes of the dual-pipe grouting machine are connected to the corresponding grouting nozzles; the dual-pipe grouting machine uses a mixture of water glass and cement, with the cement slurry being uniformly mixed as the grouting material 20. The grouting process requirements and steps for the dual-pipe grouting machine are existing technologies and can be understood by referring to them, so they will not be repeated here.

[0037] Grouting is performed on the grouting nozzle, with the grouting pressure controlled between 0.5MPa and 2.5MPa. Grouting is paused when the grouting pressure reaches the preset value, and grouting is resumed when the grouting pressure is lower than the preset value. This process is repeated multiple times.

[0038] In this embodiment, the dual-tube grouting machine uses an electric grouting pump. The electric grouting pump grouts the expansion joint 11 through the grouting nozzle, and the grouting pressure is controlled between 0.5 MPa and 2.5 MPa. For example, the voids on the back of the concrete wall are relatively small. Under the action of the grouting pressure, the grouting pressure collected by the dual-tube machine reaches the preset grouting pressure range in a short time. As the grouting material 20 flows, diffuses, and permeates along the expansion joint 11, the grouting pressure collected by the dual-tube machine will gradually decrease. Correspondingly, when the grouting pressure collected by the dual-tube machine is lower than the preset pressure, the dual-tube machine grouts again. This grouting step is repeated several times before grouting stops.

[0039] During the grouting process, when the current grouting nozzle is connected to the dual-pipe grouting machine, the discharge of grout from the preceding nozzle indicates that the grouting of the corresponding area is complete, and grouting can then proceed to the next nozzle. Grouting material 20 is used to fill and solidify the cavity behind the wall. Grout material 20 fills the gaps outside the underground foundation and side walls, thus repairing water leakage caused by water accumulation in these gaps. Grout material 20 increases density, reduces seepage and permeability, and minimizes the impact of surrounding water systems on underground engineering, playing a crucial role in the safe use of the underground concrete structure 10. Grouting acts as a curtain to stop water leakage.

[0040] After temporarily sealing the leak, the expansion joint 11 is reshaped to adjust its surface and size to fit the elastic sealing and leak-proof structure.

[0041] Step S102: A sealing groove 12 of preset depth and width is chiseled and shaped at the opening of the expansion joint 11. Waterproof mortar 13 is then applied to the opposite sides of the groove 12. The opening of the expansion joint 11 needs to be trimmed to the corresponding dimensions to accommodate the installation and processing of the sealing material. Tools are used to chisel away the contaminated concrete on the sides of the expansion joint 11 down to a solid concrete base to remove loose and easily detached concrete. The chiseling dimensions of the sealing groove 12 are greater than or equal to the preset depth and width. For example, the sealing groove 12 is chiseled and shaped to have a width of 40mm-50mm and a depth of 120mm-150mm; that is, the sealing groove 12 is a rectangular groove structure.

[0042] Step S103: Apply waterproof mortar 13 to the wall of the excavated sealing groove 12. This will not only repair and smooth the two sides of the sealing groove 12, but also make the width of the sealing groove 12 consistent.

[0043] Preferably, an acrylic copolymer emulsion is added to the waterproof mortar 13 to improve the bonding strength between the mortar and the substrate.

[0044] After the repair and leveling process is completed within the sealing groove 12, a preset waiting period is allowed for the polymer mortar and concrete to reach the designed bonding strength before proceeding to the next step. The waiting period is determined based on the characteristics of the waterproof mortar 13; for example, the waterproof mortar 13 may require 48 hours to reach its required strength.

[0045] In step S104, the sealing strip 30 is inserted into the sealing groove 12, and water-swellable sealant 40 is injected into the sealing groove 12, covering the surface of the sealing strip 30 and part of the groove wall of the sealing groove 12. The sealing strip 30 has a long cylindrical structure or a long strip structure, providing waterproofing. When the sealing strip 30 is cylindrical, its diameter is larger than the width of the sealing groove 12, so that the two sides of the sealing strip 30 fit tightly against the two side walls of the sealing groove 12. When the sealing strip 30 is rectangular, its width is adapted to the width of the sealing groove 12, so that the two sides of the sealing strip 30 fit tightly against the two side walls of the sealing groove 12. Preferably, the sealing strip 30 is made of EPDM (ethylene propylene diene monomer) sealing strip 30, which can deform and release pressure under the action of the expanding material.

[0046] After the sealing strip 30 is installed, the water-swellable sealant 40 is applied. The water-swellable sealant 40 covers the sealing strip 30 and adheres to the wall of the sealing groove 12. If the deformation joint 11 is misaligned or leaks in the future, the water-swellable sealant 40 will expand and squeeze the sealing strip 30 to improve the elastic tight fit between the sealing strip 30 and the sealing groove 12.

[0047] As a preferred option, the application process of water-swellable sealant 40 includes the following steps: The first thickness of water-swellable sealant 40 is filled into the sealing groove 12 and covers the surface of the sealing strip 30; Equal curing time for water-swellable sealing adhesive (40 days preset time); Fill the sealing groove 12 with the second thickness of water-swellable sealant 40 and cover it with the cured water-swellable sealant 40.

[0048] Water-swellable sealant 40 is applied in layers to form a multi-layered structure. This allows for both central curing of the sealant 40, reducing internal pressure, and multi-layered deformation structure, enhancing its elastic deformation effect. The water-swellable sealant 40 can cover and enclose the sealing strip 30, which elastically deforms when the sealant 40 undergoes elastic deformation, thereby relieving pressure.

[0049] Step S105: The water-swellable rubber waterstop strip 50 is inserted into the sealing groove 12 and pressed against the water-swellable sealant 40. The water-swellable rubber waterstop strip 50 is a long strip structure made of water-swellable material. The water-swellable rubber waterstop strip 50 is pressed against the cured water-swellable sealant 40, thus forming a secondary expansion waterproof protection. Preferably, the expansion ratio of the water-swellable rubber waterstop strip 50 is between 200% and 300%, which can ensure that the expansion joint 11 can still maintain a seal when its size changes. Furthermore, the water-swellable rubber waterstop strip 50 and the water-swellable sealant 40 achieve multiple seals, and the seal size can change with the size of the expansion joint 11.

[0050] In step S106, the rigid strip 60 is pressed onto the water-swellable rubber waterstop strip 50. Multiple reinforcing bars 70 are installed on the sidewall of the sealing groove 12, which constrain the rigid strip 60 to fit snugly against the water-swellable rubber waterstop strip 50. The rigid strip 60 is a columnar or elongated rigid strip structure. Preferably, the rigid strip 60 is made of reinforcing bars, round steel, rigid pipes, or steel plates. The rigid strip 60 provides rigid support to the water-swellable rubber waterstop strip 50, thereby maintaining the stability of the pressing force.

[0051] The reinforcing bars 70 are steel bars embedded in the concrete. The reinforcing bars 70 are intersecting and crimped onto the rigid strip 60, allowing the position of the rigid strip 60 to be defined by the crimping. Preferably, the reinforcing bars 70 are distributed on both sides of the rigid strip 60 to form an inverted V-shape structure, enabling crimping from both sides of the rigid strip 60. The reinforcing bars 70 are spaced apart along the length of the rigid strip 60 to maintain crimping positioning.

[0052] In step S107, repair grout 80 is poured into the sealing groove 12, covering the water-swellable rubber waterstop strip 50 and the rigid strip 60. The repair grout 80 covering the water-swellable rubber waterstop strip 50 and the rigid strip 60 achieves a seal at the opening of the sealing groove 12. Furthermore, the repair grout 80 can further improve the sealing effect, and after curing, it forms an elastic structure that can adapt to changes in the dimensions of the two sides of the sealing groove 12. Preferably, the repair grout 80 is a polyurea grout, which has high solids content, high elastic elongation structure, and strong adhesion.

[0053] Step S108: Fix the waterproof component 90 on the surface of the concrete structure 10, and the waterproof component 90 covers the sealing groove 12.

[0054] The sealing strip 30 compresses and seals the bottom of the sealing groove 12, providing resistance to bending and torsion. The water-swellable sealant 40 expands upon contact with water, achieving a leak-proof seal. The water-swellable rubber sealant 50 is compressed by a rigid strip 60, which is rigidly confined by reinforcing bars 70, thus achieving pre-compression and confinement effects and improving elasticity. The repair grout 80 and waterproof components 90 can achieve elastic deformation, adapting to the deformation of the expansion joint 11 within its range. The sealing groove 12 employs a multi-layered sealing structure, with elastic, colloidal, and rigid materials used to confine the layers, adapting to different deformation states of the expansion joint 11. Even with moderate dimensional variations in the expansion joint 11, it maintains a good leak-proof effect.

[0055] In one embodiment, fixing the waterproof component 90 to the surface of the concrete structure 10 includes the following steps: A polymer waterproof membrane 92 is laid around the perimeter of the sealing groove 12, with two sides of the polymer waterproof membrane 92 sealing the surface of the concrete structure 10. The surface around the sealing groove 12 is cleaned to ensure a tight fit between the surface and the polymer waterproof membrane 92. For example, the polymer waterproof membrane 92 may be made of EPDM rubber, polyvinyl chloride, or high-density polyethylene.

[0056] Preferably, the elongation of the polymer waterproof membrane 92 is greater than or equal to 200%.

[0057] Preferably, acrylic emulsion is applied to the surface of the concrete structure 10 and to the periphery of the sealing groove 12. The acrylic emulsion is made by mixing acrylic copolymer emulsion with cement to form a gel, wherein the bonding strength between the acrylic emulsion and the substrate is less than or equal to 1.5 MPa.

[0058] The stainless steel plate 91 is fixed to the concrete structure 10 and covered with a press-fitted polymer waterproof membrane 92. The stainless steel plate 91 has a deformation zone with at least partial bending at the sealing groove 12.

[0059] After the sealing of expansion joint 11 is completed, a stainless steel plate 91 is fixed to the outside of the corresponding polymer waterproof membrane 92. The stainless steel plate 91 is fixed with expansion bolts on both sides, and the edges of the stainless steel plate 91 are sealed with weather-resistant adhesive. Preferably, the stainless steel plate 91 is locally deformed, such as the deformation area being a C-shape, W-shape, or wavy deformation structure.

[0060] In one embodiment, the concrete structure 10 is provided with inclined grouting holes 14, which extend to the sealing strip 30. After construction, each side of the sealing groove 12 is provided with a corresponding grouting hole 14, and the depth of the grouting hole 14 extends to the corresponding position of the sealing strip 30 to prevent water leakage caused by exceeding the design settlement deformation limit. The leakage channel in the deformation joint 11 can be repaired by grouting through the grouting holes 14.

[0061] It should be understood that this application is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. This application is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of this application and include common knowledge or customary techniques in the art that are not disclosed in this invention.

Claims

1. A method for repairing expansion joints in concrete structures, characterized in that, The construction method includes: Clean the expansion joints and seal the leaking areas by grouting the cavity on the back side; The opening of the expansion joint is chiseled and shaped into a sealing groove with a preset depth and width, and waterproof mortar is applied to the opposite sides of the groove. The sealing strip is inserted into the sealing groove, and water-swellable sealant is injected into the sealing groove, the water-swellable sealant covering the surface of the sealing strip and part of the groove wall. Insert the water-swellable rubber waterstop strip into the sealing groove and press it with the water-swellable waterstop adhesive; A rigid strip is pressed onto the water-swellable rubber waterstop strip, and multiple reinforcing bars are provided on the side wall of the sealing groove. The multiple reinforcing bars constrain the rigid strip to fit the water-swellable rubber waterstop strip. Pour repair grout into the sealing groove, and cover the water-swellable rubber waterstop strip and rigid strip with the repair grout. A waterproof component is fixed to the surface of a concrete structure, the waterproof component covering the sealing groove.

2. The construction method according to claim 1, characterized in that, The cleaning of the expansion joint and the grouting of the leaking area include: Grouting nozzles are installed at preset intervals along the expansion joint, and valves are installed at the ends of the grouting nozzles; Drill through the expansion joint with a long drill bit along the grouting nozzle until water flows out of the corresponding area of ​​the expansion joint, then close the valve. The grouting equipment is connected to the corresponding grouting nozzle to fill the cavity of the expansion joint with grout multiple times.

3. The construction method according to claim 2, characterized in that, The process of repeatedly filling the cavity of the expansion joint with grout by connecting the grouting equipment to the corresponding grouting nozzle includes: Connect the grouting pipe of the dual-pipe machine to the corresponding grouting nozzle; the dual-pipe machine uses a mixture of water glass and cement for grouting, and the cement slurry is mixed evenly as the grouting material; Grouting is performed on the grouting nozzle, with the grouting pressure controlled between 0.5MPa and 2.5MPa. Grouting is paused when the grouting pressure reaches the preset value, and grouting is resumed when the grouting pressure is lower than the preset value. This process is repeated multiple times.

4. The construction method according to claim 1, characterized in that, Acrylic copolymer emulsion is added to the waterproof mortar.

5. The construction method according to claim 1, characterized in that, The water-swellable sealant covers the surface of the sealing strip and part of the groove wall of the sealing groove, including: Fill the sealing groove with the first thickness of water-swellable sealant and cover the surface of the sealing strip; The preset curing time for water-swellable sealing adhesive is determined by the following parameters; Fill the sealing groove with the second thickness of water-swellable sealant and cover it with the cured water-swellable sealant strip.

6. The construction method according to claim 1, characterized in that, The expansion ratio of the water-swellable rubber waterstop strip is 200%-300%.

7. The construction method according to claim 1, characterized in that, The method of fixing the waterproof component on the surface of the concrete structure includes: A polymer waterproof membrane is laid around the perimeter of the sealing groove, and the two sides of the polymer waterproof membrane are sealed to the surface of the concrete structure. A stainless steel plate is fixed to a concrete structure and covered with a polymer waterproof membrane. The stainless steel plate has at least a partially bent deformation zone corresponding to the sealing groove.

8. The construction method according to claim 7, characterized in that, The elongation of the polymer impermeable membrane waterproof membrane is greater than or equal to 200%.

9. The construction method according to claim 7, characterized in that, The periphery of the sealing groove is coated with acrylic emulsion grout, which is made by mixing acrylic copolymer emulsion with cement to form a gel; the repair grout is polyurea grout.

10. The construction method according to claim 1, characterized in that, The concrete structure has pre-drilled inclined grouting holes that extend to the sealing strip.

Images