Rechargeable prosthetic interosseous structure and method

Abstract

This invention provides a precast tensile joint panel and a pressurized repair method for joints in rockfill dams. The precast panel allows for rapid on-site installation, avoiding the cracking and watertightness issues common in cast-in-place panels during strength development. The precast panel is pre-embedded with inflatable steel pipes and pressurized grouting steel pipes, enabling pressurized testing and repair of the joint structure. This invention improves the bottom W-shaped copper waterstop structure of the cast-in-place concrete panel to an Ω-shaped copper waterstop suitable for precast panels. The Ω-shaped copper waterstop has a rubber rod and polyurethane foam board at the nose, and joint-sealing rubber strips on both sides. Between the upper and lower Ω-shaped copper waterstops is a zoned rubber strip, which is heat-fused to the joint-sealing rubber strip, resulting in excellent water-stopping effect and high seepage prevention. The pressurized repair method of this invention ensures the integrity of the waterstop by checking the joint structure through zoned pressurized testing. If the waterstop is not completely sealed, grouting is performed on the joint surfaces of the zoned sections through the pre-installed pressurized grouting steel pipes to achieve the required water stoppage.

Description

Technical Field

[0001] This invention belongs to the field of water conservancy and hydropower technology, specifically relating to a tension joint precast panel and a pressurizable repair joint structure and method adapted to rockfill dams. Background Technology

[0002] Concrete-faced rockfill dams are earth-rock dam structures where the upstream surface is covered with a concrete face as a seepage barrier, and rockfill is used as the dam construction material. They offer advantages such as good foundation adaptability, low cost, and ease of construction. With the continuous advancement and improvement of thin-layer roller compaction construction technology, the number and height of concrete-faced rockfill dams have increased rapidly, gradually becoming one of the mainstream dam types in modern water conservancy and hydropower engineering. The Shuibuya Project in Hubei Province, with its 233m dam height, represents the current world level of dam construction.

[0003] In the design and construction of concrete-faced rockfill dams, the concrete panels undergo a strength increase process during the large deformation of the dam body. During this period, cracking, compression damage, and failure of the joint seals can easily occur, leading to leakage problems. In addition to controlling the deformation of the rockfill body, improving the early strength of the panels, developing reasonable jointing methods, and developing repairable joint seal structures, connection methods, and construction techniques are key to solving the above-mentioned problems in high-faced rockfill dams.

[0004] The invention patent with publication number CN110644441 A, entitled "A Novel Prefabricated Panel Structure for Panel Rockfill Dams," describes a novel prefabricated panel structure for panel rockfill dams. This structure can be prefabricated in a factory for rapid on-site installation. The panels possess high strength and good flexibility, adapting to settlement, displacement, and other deformations of the rockfill mass. The panel joint sealing device enables automatic pressurized sealing, and its deformation capacity can accommodate settlement, shearing, and tensile deformation between joints. The panel structure includes longitudinal and transverse joints, and is composed of panel units and sealing devices between adjacent panel units. The panel unit uses precast reinforced concrete panels, which are divided into convex panel units and concave panel units. Both convex and concave panel units have steel plates embedded at the joints of adjacent panel units. The convex panel unit has a rectangular boss, with W-shaped steel plates on the upstream and downstream contact surfaces of the boss. The two ends of the steel plates are embedded in the panel, while the middle W-shaped steel plate is detached from the concrete panel. The convex panel unit has grouting holes and grouting vent holes. The concave panel unit has a rectangular groove, with semi-circular recesses reserved on the upstream and downstream contact surfaces of the groove. After the boss of the convex panel unit is embedded into the groove of the concave panel unit, grout is injected into the W-shaped steel plate through the grouting holes on the convex panel unit, causing the W-shaped steel plate to penetrate deep into the recess of the concave panel, forming a hinged connection device.

[0005] The aforementioned panel unit has a complex structure, consisting of convex and concave panel units. All units require grouting to form a hinged connection device, which, together with the upper and lower layers of rubber waterproofing and flexible filler, creates three lines of defense against water leakage. The numerous on-site procedures make it inconvenient for widespread application. Summary of the Invention

[0006] Another object of the present invention is to provide a tension joint prefabricated panel suitable for rockfill dams, which can be quickly installed to form a T-joint.

[0007] Another objective of this invention is to provide a pressurizable repair structure for joints that can meet high impermeability requirements and prevent deformation of the rockfill body from causing water-stop cracking.

[0008] Another objective of this invention is to provide a pressurizable repair method that checks the joint structure by zonal pressurization to ensure the integrity of the waterproofing.

[0009] Therefore, the technical solution provided by the present invention is as follows: A tension joint precast panel suitable for rockfill dams includes a precast concrete slab, the perimeter of which is wrapped with a steel plate, and the precast concrete slab is embedded with an air-inflating steel pipe and a pressurized water grouting steel pipe, the inlet ends of which are provided with threaded joints. Both the inflatable steel pipe and the pressurized water grouting steel pipe are L-shaped, with one end of the inflatable steel pipe and the pressurized water grouting steel pipe located on the surface of the precast panel and the other end located in the middle of the thickness of the precast panel.

[0010] The length of the screw thread is not less than 5cm.

[0011] The pressurizable repair joint structure includes a water-stopping structure and a tension joint precast panel adapted to a rockfill dam. The precast panels are joined by T-shaped joints, and both the top and bottom ends of the T-shaped joints are equipped with water-stopping structures. The top and bottom water-stopping structures are fixed to the surface of the precast panels by anchoring structures. The top water-stopping structure is filled with SR plastic filler, and a cover plate is provided on the SR plastic filler. The two ends of the cover plate are fixed to the surface of the precast panels. The bottom water-stopping structure is provided with a mortar pad layer at its lower part.

[0012] The water-stopping structure includes an Ω-shaped copper waterstop, a rubber rod, a joint-sealing rubber strip, and a partitioned rubber strip. The rubber rod is located at the nostril of the Ω-shaped copper waterstop. The joint-sealing rubber strip is folded into a U-shape and wraps around the precast panel, forming rubber pads on the upper and lower end faces of the precast panel. The partitioned rubber strip is located in the middle of the joint side length of the precast panel. The joint-sealing rubber strip and the partitioned rubber strip are heat-fused together. The joint between the Ω-shaped copper waterstop and the partitioned rubber strip is filled with polyurethane foam board.

[0013] The partitioned rubber strip has an H-shaped planar surface, with its vertical ends pressing against the nose of the Ω-shaped copper waterstop. A pressure hole is pre-reserved in the middle of the partitioned rubber strip, and the pressure hole is connected to the air-filled steel pipe.

[0014] The anchoring structure includes symmetrically arranged galvanized tie bolts and galvanized flat steel. The two ends of the galvanized tie bolts pass through an Ω-shaped copper waterstop, a rubber gasket, and the galvanized flat steel in sequence and are then fixed by nuts.

[0015] The pressurization repair method includes the following steps: Step 1) After the top and bottom water-stop structures are installed by the anchoring structure, inflate the rubber strips of the three T-shaped seams in the inspection area along the pre-reserved inflatable steel pipe of the precast panel, and squeeze the surrounding panel and copper water stop to form a closed water stop. The inflation pressure is not less than 1.5 times the pressure head of the panel. Maintain the pressure between the holes during the inspection. Step 2) Through the reserved pressurized grouting steel pipe, conduct a pressurized water test on each closed section to check the water-stopping performance of each water-stopping section. The pressure should be no less than the pressure head of the precast panel, and the pressure should be maintained for 1 to 5 minutes. If there is no pressure drop and no water seepage on the top surface, it indicates that the water-stopping connection between the sections is closed and the inspection is qualified. Step 3) If the water pressure test shows that the water stop is not sealed, chemical grouting is performed on the joint surface of the section through the reserved water pressure grouting steel pipe; Step 4) After the inspection and processing are completed, all the pre-embedded steel pipe openings in the partition are sealed with bolts, and then welded and sealed along the perimeter and the contact surface with the steel plate.

[0016] In step 3), the grouting pressure during the entire grouting process should be controlled within 0.3 MPa, and should not exceed 0.5 MPa. Grouting should be stopped when no grout is sucked in for 15 minutes under the maximum pressure.

[0017] The beneficial effects of this invention are: This invention uses prefabricated panels, enabling rapid on-site installation and avoiding the problems of cracking and damage to the waterproofing between joints that occur during the strength development process of cast-in-place panels. The prefabricated panels are pre-embedded with air-inflated steel pipes and pressurized water grouting steel pipes, allowing for pressure testing and repair of the joint structure.

[0018] This invention improves the W-shaped copper waterstop structure at the bottom of the cast-in-place concrete panel into an Ω-shaped copper waterstop suitable for precast panels. The Ω-shaped copper waterstop has a rubber rod and a polyurethane foam board at the nose, and joint sealing rubber strips on both sides. There is a partitioned rubber strip between the upper and lower Ω-shaped copper waterstops. The joint sealing rubber strip and the partitioned rubber strip are heat-fused together, resulting in good water-stopping effect and high seepage prevention capability.

[0019] This invention provides a pressurized repair method that ensures the integrity of the water stop by inspecting the joint structure through zonal pressurization. Each sealed zone is checked for water pressure using pre-installed pressurized grouting steel pipes in the precast slab, verifying the water stop's sealing performance and ensuring it meets requirements. If the water stop is not sealed, grout is injected into the joint surface between zones through the pre-installed pressurized grouting steel pipes to achieve the required water stop. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the T-shaped connection panel seam structure of the present invention; Figure 2 yes Figure 1 AA section view in the middle; Figure 3 yes Figure 1 BB cross-section view in the middle; Figure 4 This is a detailed cross-section of the air inlet of the partitioned rubber strip.

[0021] In the diagram: 1. Precast panel; 2. Steel plate; 3. Joint sealing rubber tape; 4. Zoned rubber tape; 5. Air inlet; 6. Pressurized water grouting steel pipe; 7. Ω-shaped copper waterstop; 8. Rubber rod; 9. SR plastic filler; 10. Cover plate; 11. Rubber gasket; 12. Galvanized tie bolt; 13. Galvanized expansion bolt; 14. Inflatable steel pipe; 15. Mortar bedding layer; 16. SK edge sealant; 17. Galvanized flat steel. Detailed Implementation

[0022] The following specific embodiments illustrate the implementation of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification.

[0023] Exemplary embodiments of the present invention will now be described with reference to the accompanying drawings. However, the present invention may be embodied in many different forms and is not limited to the embodiments described herein. These embodiments are provided to fully and completely disclose the invention and to fully convey its scope to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the drawings is not intended to limit the invention. In the drawings, the same units / elements are referred to by the same reference numerals.

[0024] Unless otherwise stated, the terms used herein (including technical terms) have their common meaning as understood by one of ordinary skill in the art. Furthermore, it is understood that terms defined in commonly used dictionaries should be understood to have a meaning consistent with the context of their relevant field, and not to be interpreted as having an idealized or overly formal meaning.

[0025] Example 1 This embodiment provides a tension joint precast panel suitable for rockfill dams, including a precast concrete slab. The periphery of the precast concrete slab is wrapped with a steel plate 2. The precast concrete slab is embedded with an air-inflated steel pipe 14 and a pressurized water grouting steel pipe 6. The inlet ends of the air-inflated steel pipe 14 and the pressurized water grouting steel pipe 6 are both provided with threaded ends. This invention uses a prefabricated panel 1, which enables rapid on-site installation and avoids the problems of cracking and damage to the waterproofing between joints during the strength development process of cast-in-place panels. The prefabricated panel 1 is pre-embedded with an air-inflatable steel pipe 14 and a pressurized water grouting steel pipe 6, which can be used for pressurization testing and repair of the joint structure.

[0026] Example 2 Based on Embodiment 1, this embodiment provides a tension joint precast panel suitable for rockfill dams. Both the inflatable steel pipe 14 and the pressurized water grouting steel pipe 6 are L-shaped, with one end of each pipe located on the surface of the precast panel 1 and the other end located in the middle of the precast panel 1's thickness. Figure 2 and Figure 3 As shown.

[0027] In this embodiment, the dimensions of the prefabricated panel 1 unit are 4 to 10 m in length and width, and 0.3 m to 0.8 m in thickness. The connection between panels adopts T-shaped joints and is strictly prohibited from being made into cross shapes. The joint distance between units should be staggered by no less than 50 cm. The perimeter of the panel is wrapped with steel plate 2, and pressurized steel pipes and pressurized water grouting pre-embedded steel pipes are also pre-embedded.

[0028] The length of the screw thread is not less than 5cm.

[0029] The inlet end of the pressurized steel pipe and the pre-embedded steel pipe panel for water grouting adopts a threaded joint with a thread length of not less than 5cm. After the water-stopping inspection and treatment are completed, the threaded joint is sealed with bolts and then welded to the contact surface with the steel plate 2 along the perimeter.

[0030] Example 3 This embodiment provides a pressurizable repair structure for interstitial joints, such as... Figure 1 As shown, it includes a water-stopping structure and a tension joint precast panel adapted to a rockfill dam. T-shaped joints are used between the precast panels 1. Water-stopping structures are provided at the top and bottom of the T-shaped joints. The top and bottom water-stopping structures are fixed to the surface of the precast panel 1 by an anchoring structure. SR plastic filler 9 is filled above the top water-stopping structure. A cover plate 10 is provided on the SR plastic filler 9. The two ends of the cover plate 10 are fixed to the surface of the precast panel 1. A mortar pad layer 15 is provided at the bottom of the bottom water-stopping structure.

[0031] The top structure was further sealed with SR plastic filler 9 to create a bulge, and finally covered with cover plate 10. Cover plate 10 is an EPDM composite cover plate, and both sides of cover plate 10 are fixed to the surface of precast panel 1 using galvanized flat steel 1750×6mm and galvanized expansion bolts 13M10×125mm@250mm. The perimeter of the galvanized expansion bolts 13 is sealed with SK edge sealant 16 to further ensure waterproofing.

[0032] Example 4 Based on Example 3, this example provides a pressurizable repair joint structure. The water-stopping structure includes an Ω-shaped copper waterstop 7, a rubber rod 8, a joint-sealing rubber strip 3, and a partitioned rubber strip 4. The rubber rod 8 is located at the nose of the Ω-shaped copper waterstop 7. The joint-sealing rubber strip 3 is folded into a U-shape to wrap around the prefabricated panel 1, forming rubber pads 11 on the upper and lower end faces of the prefabricated panel 1. The partitioned rubber strip 4 is located at the middle part of the joint side length direction of the prefabricated panel 1. The joint-sealing rubber strip 3 and the partitioned rubber strip 4 are heat-fused together. The joint between the Ω-shaped copper waterstop 7 and the partitioned rubber strip 4 is filled with polyurethane foam board.

[0033] like Figure 2 As shown, the joint sealing rubber tape 3 is folded into a U-shape to wrap around the precast panel 1, and also serves as the rubber gasket 11 for the upper and lower Ω-shaped copper waterstops 7. Chemical adhesive is brushed between the partition rubber tape 4 and the Ω-shaped copper waterstop 7, and pressed tightly onto the copper waterstop surface. The partition rubber tape 4 and the joint sealing rubber tape 3 are connected by heat fusion. Chemical adhesive is brushed onto the contact surfaces of the partition rubber tape 4, the joint sealing rubber tape 3, the steel plate 2, and the Ω-shaped copper waterstop 7.

[0034] Example 5 Based on Example 3, this example provides a pressurizable repair joint structure. The plane of the partitioned rubber strip 4 is H-shaped, and its vertical ends are pressed against the nose end of the Ω-shaped copper waterstop strip 7. The partitioned rubber strip 4 has a pre-reserved pressurization hole in the middle, and the pressurization hole is connected to the air-filled steel pipe 14.

[0035] The partition rubber strip 4 is located in the middle of the panel joint along its length. It is H-shaped in plan, with both vertical ends pressed against the copper water-stop noses. A 20mm diameter pressure hole is pre-drilled in the middle of the partition rubber strip 4. Figure 4 As shown. The inflatable hole is a rectangle with a thickness of 0.2cm and a width of 1m around the nose, and a circular hole with a diameter of 2cm in the vertical direction. The center of the hole connects to the 14 holes of the inflatable steel pipe reserved on the side of the panel. The gap between the upper and lower Ω-shaped copper waterstop 7 and the partition rubber strip 4 of the adjacent panel is filled with polyurethane foam board with a thickness of about 1cm.

[0036] The steel pipe for later pressurized water grouting is about 50cm away from the rubber strip 4 of the partition. The inlet is located on the surface of the steel plate 2 of the precast panel 1, and the outlet leads to the joint. The grouting hole and grouting vent hole are located in the middle of the panel thickness. The inner diameter of the pressure grouting hole is 60-80 mm.

[0037] Example 6 Based on Example 3, this example provides a pressurizable repair joint structure. The anchoring structure includes symmetrically arranged galvanized tie bolts 12 and galvanized flat steel 17. The two ends of the galvanized tie bolts 12 pass through the Ω-shaped copper waterstop 7, the rubber gasket 11 and the galvanized flat steel 17 in sequence and are then fixed by nuts.

[0038] Pre-tighten the galvanized tie bolts 12M10×125mm@250mm to form a water-stop seal between the Ω-shaped copper waterstop 7 and the upper and lower rubber strip structures and the surface of the steel plate 2. The two sides of the Ω-shaped copper waterstop 7 are anchored to the precast panel 1 as a whole by rubber gaskets 11 with a thickness of about 6mm, galvanized flat steel 17 with a thickness of 50×6mm, and galvanized tie bolts 12M10×125mm@250mm. Holes should be reserved at the corresponding positions of the expansion bolts for the Ω-shaped copper waterstop 7, rubber gaskets 11, and galvanized flat steel 17.

[0039] Example 7 This embodiment provides a pressurization repair method, including the following steps: Step 1) After the top and bottom water-stop structures are installed by the anchoring structure, inflate the rubber strips 4 of the three T-shaped seams in the inspection area along the pre-reserved pressurized steel pipe of the precast panel 1 to compress the surrounding panel and copper water stop to form a closed water stop. The inflation pressure is not less than 1.5 times the pressure head of the panel. Maintain the pressure between the holes during the inspection. Step 2) Through the reserved pressurized grouting steel pipe 6, conduct a pressurized water test on each closed section to check the water-stopping sealing of each water-stopping section. The pressure should be no less than the pressure head of the precast panel 1, and the pressure should be maintained for 1 min to 5 min. If the pressure does not drop and there is no water seepage on the top surface, it indicates that the water-stopping connection between the sections is closed and the inspection is qualified. Step 3) If the water pressure test shows that the water stop is not sealed, chemical grouting is performed on the joint surface of the section through the reserved water pressure grouting steel pipe; Step 4) After the inspection and processing are completed, all the pre-embedded steel pipe openings in the partition are sealed with bolts, and then welded and sealed along the perimeter and the contact surface with the steel plate 2.

[0040] In step 3), the grouting pressure during the entire grouting process should be controlled within 0.3 MPa, and should not exceed 0.5 MPa. Grouting should be stopped when no grout is sucked in for 15 minutes under the maximum pressure.

[0041] Example 8 To provide a more detailed description of the present invention, the following installation and inspection steps are provided: (1) Prefabricate panel unit 1 in the factory, with dimensions of 4 to 10m in length and width and 0.8m to 1.6m in thickness. The panel is wrapped with steel plate 2 around its perimeter, and pressurized steel pipe and pressurized water grouting steel pipe 6 are pre-embedded.

[0042] (2) The installation of precast panel 1 shall meet the settlement stability requirements of the lower fill, and the surface of the fill at the joint of precast panel 1 shall be treated in accordance with the following requirements: Figure 1 and Figure 2 Set a mortar cushion layer of 15.

[0043] (3) Lay the upper and lower Ω-shaped copper waterstops 7 and their anchoring structures along the mortar pad 15, and reserve galvanized flat steel 17, rubber gaskets 11 and copper waterstops with holes in the expansion bolt positions. The galvanized expansion bolts 13M10×125mm@250mm are pre-drilled.

[0044] (4) The partition rubber strip 4 and its inflatable hole are manufactured in the factory. After arriving on site, the joint sealing rubber strip 3 and the partition rubber strip 4 are heat-fused together. The joint sealing rubber strip 3 is folded into a U-shape to wrap around the panel and also serves as the rubber gasket 11 for the upper and lower Ω-shaped copper waterstops. The partition rubber strip 4 is located in the middle of the panel joint side length direction, with an H-shape in the plane and both vertical ends pressed against the copper waterstop nose. In the middle of the partition rubber strip 4, an inflatable hole with a diameter of 20mm is reserved. The inflatable hole is a rectangle with a thickness of 0.2cm and a width of 1m around the nose, and a round hole with a diameter of 2cm in the vertical direction. The middle part is connected to the inflatable steel pipe 14 reserved on the side of the panel.

[0045] (5) After the panel is transported to the site, connect it to the lower end, the upper end Ω-shaped copper waterstop 7 and its anchoring structure, the partition rubber strip 4 and its pressurization hole in sequence. Apply chemical adhesive between the partition rubber strip 4 and the Ω-shaped copper waterstop 7 and press it tightly to the surface of the Ω-shaped copper waterstop 7. The partition rubber strip 4 and the joint sealing rubber strip 3 are connected by hot melt. Apply chemical adhesive to the contact surfaces of the partition rubber strip 4, the joint sealing rubber strip 3 and the steel plate 2 and the Ω-shaped copper waterstop 7. Pre-tighten the galvanized expansion bolts 13M10×125mm@250mm so that the Ω-shaped copper waterstop 7 and the upper and lower rubber strip structures form a water-stop seal along the surface of the steel plate 2. T-shaped joints are used for panel connections on site. Cross-shaped joints are strictly prohibited. The distance between joints between units should be staggered by no less than 50cm. The joints between the upper and lower Ω-shaped copper waterstops 7 and the partition rubber strips 4 of adjacent panels are filled with polyurethane foam board with a thickness of about 1cm. Inflatable steel pipes 14 and pressurized water grouting steel pipes 6 are pre-embedded on the side of the panel. Threaded joints are set at the inlet of the steel pipes.

[0046] (6) After the upper and lower Ω-shaped copper waterstop 7 and its anchor structure, the partition rubber strip 4 and its pressurization hole are connected and installed with the panel, pressurize the three T-shaped seam partition rubber strip 4 along the reserved pressurization steel pipe of the panel to compress the surrounding panel and copper waterstop to form a closed waterstop. The pressurization pressure is not less than 1.5 times the pressure head of the panel. During the inspection, the pressure between the holes is maintained.

[0047] (7) Through the reserved pressurized grouting steel pipe 6, a pressurized water test is carried out on each closed section to check the water-stopping performance of each water-stopping section. The pressure is not less than the pressure head of the panel, and the pressure is maintained for 1 min to 5 min. If there is no pressure drop and no water seepage on the top surface and other parts, it indicates that the water-stopping connection between the sections is closed and the inspection is qualified.

[0048] (8) Install SR plastic filler 9 and its anchoring structure, including SR plastic filler 9 and its surface EPDM composite cover plate 10. The cover plate 10 is fixed to the surface of the precast panel 1 by galvanized expansion bolts 13M10×125mm@250mm on both sides through upper galvanized flat steel 1750×6mm.

[0049] (9) After the inspection and processing are completed, all the pre-embedded steel pipe openings in the partition are sealed with bolts and then welded to the contact surface with the steel plate 2 along the perimeter.

[0050] If the pressure drops in step (7) and water seeps between the upper Ω-shaped copper waterstop and the panel, the waterstop is unqualified. In this case, grouting is required through the pressure grouting steel pipe 6 to grout the joint surfaces of the sections; the grouting pressure during the entire grouting process should be controlled within 0.3 MPa, and should not exceed 0.5 MPa. Grouting should be stopped when no grout is absorbed for 15 minutes under maximum pressure. After passing the test, continue with step (8).

[0051] The above examples are merely illustrative of the present invention and do not constitute a limitation on the scope of protection of the present invention. All designs that are the same as or similar to the present invention are within the scope of protection of the present invention.

Claims

1. A pressurizable repair structure for joints, characterized in that: It includes a water-stop structure and a tension joint precast panel. The precast panels are connected by T-shaped joints, and the joint distance between units is staggered by not less than 50cm. The top and bottom ends of the T-shaped joint are equipped with water-stop structures. The top and bottom water-stop structures are fixed to the surface of the precast panel by anchoring structures. The top water-stop structure is filled with SR plastic filler, and the SR plastic filler is equipped with a cover plate. The two ends of the cover plate are fixed to the surface of the precast panel. The bottom water-stop structure is equipped with a mortar pad layer at the bottom. The tension joint precast panel includes a precast concrete slab, the perimeter of which is wrapped with a steel plate, and the precast concrete slab is pre-embedded with an air-filled steel pipe and a pressurized water grouting steel pipe, the inlet ends of which are provided with threaded joints. The water-stopping structure includes an Ω-shaped copper waterstop, a rubber rod, a joint-sealing rubber strip, and a partitioned rubber strip. The rubber rod is located at the nostril of the Ω-shaped copper waterstop. The joint-sealing rubber strip is folded into a U-shape to wrap around the precast panel, forming rubber pads on the upper and lower end faces of the precast panel. The partitioned rubber strip is located at the middle part of the joint side length direction of the precast panel. The joint-sealing rubber strip and the partitioned rubber strip are heat-fused together. The joint between the Ω-shaped copper waterstop and the partitioned rubber strip is filled with polyurethane foam board. The partitioned rubber strip has an H-shaped planar surface, with its vertical ends pressing against the nose of the Ω-shaped copper waterstop. A pressure hole is pre-reserved in the middle of the partitioned rubber strip, and the pressure hole is connected to the air-filled steel pipe.

2. The pressurizable repair joint structure according to claim 1, characterized in that: Both the inflatable steel pipe and the pressurized water grouting steel pipe are L-shaped, with one end of the inflatable steel pipe and the pressurized water grouting steel pipe located on the surface of the precast panel and the other end located in the middle of the thickness of the precast panel.

3. The pressurizable repair joint structure according to claim 1, characterized in that: The length of the screw thread is not less than 5cm.

4. The pressurizable repair joint structure according to claim 1, characterized in that: The anchoring structure includes symmetrically arranged galvanized tie bolts and galvanized flat steel. The two ends of the galvanized tie bolts pass through an Ω-shaped copper waterstop, a rubber gasket, and the galvanized flat steel in sequence and are then fixed by nuts.

5. The pressurized repair method for pressurized repair of interstitial structures according to any one of claims 1-4, characterized in that, Includes the following steps: Step 1) After the top and bottom water-stop structures are installed by the anchoring structure, inflate the rubber strips of the three T-shaped seams in the inspection area along the pre-reserved inflatable steel pipe of the precast panel, and squeeze the surrounding panel and copper water stop to form a closed water stop. The inflation pressure is not less than 1.5 times the pressure head of the panel. Maintain the pressure between the holes during the inspection. Step 2) Through the reserved pressurized grouting steel pipe, conduct a pressurized water test on each closed section to check the water-stopping performance of each water-stopping section. The pressure should be no less than the pressure head of the precast panel, and the pressure should be maintained for 1 to 5 minutes. If there is no pressure drop and no water seepage on the top surface, it indicates that the water-stopping connection between the sections is closed and the inspection is qualified. Step 3) If the water pressure test shows that the water stop is not sealed, chemical grouting is performed on the joint surface of the section through the reserved water pressure grouting steel pipe; Step 4) After the inspection and processing are completed, all the pre-embedded steel pipe openings in the partition are sealed with bolts, and then welded and sealed along the perimeter and the contact surface with the steel plate.

6. The pressurization repair method according to claim 5, characterized in that: In step 3), the grouting pressure during the entire grouting process should be controlled within 0.3 MPa, and should not exceed 0.5 MPa. Grouting should be stopped when no grout is sucked in for 15 minutes under the maximum pressure.

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