Method for treating joint diseases of underground diaphragm wall

Abstract

The invention provides an underground diaphragm wall joint disease treatment method. The treatment method comprises the steps of serious water seepage / white crack repair, concrete stripping, exposed reinforcement treatment and joint drainage treatment. According to the construction method, serious water seepage / white crack repairing at the joint of the underground diaphragm wall, concrete stripping, reinforcement exposure treatment and other disease treatment at various joints can be achieved, the problem that the joint of the underground diaphragm wall needs to be chiseled away and constructed again is solved, or the problem that a secondary lining is constructed after a waterproof and drainage system is constructed again under the condition that the structure clearance is occupied is solved; the construction assembly is used for scraping concrete at the joints of the underground diaphragm wall, rapid cleaning of the concrete can be achieved so that diseases can be treated conveniently, rapid construction can be conducted according to the actual situation, the problem that the joints at the high positions of the underground diaphragm wall are not easy to construct rapidly is solved, and the construction efficiency is improved. And the concrete is crushed while being scraped, so that subsequent collection and treatment are facilitated, and high efficiency and durability of disease treatment at the joint of the continuous wall are ensured.

Description

Technical Field

[0001] The invention relates to a method for treating underground continuous wall joint diseases, belonging to the technical field of building construction. Background Art

[0002] With the development of society, the number of underground projects that have been put into operation has gradually increased. In areas with complex geological conditions, sensitive surrounding environment, and deep foundation pits, underground continuous walls are used as retaining structures or as main structures. Since underground continuous walls generally use conduit to cast concrete structures, they will suffer from defects after years of operation due to engineering geology, hydrogeology, construction technology, and construction quality. In projects where underground continuous walls are used as retaining structures, drainage systems and secondary lining structures are provided, and the safety and durability of the structures are good. In the field of projects where underground continuous walls are used as main structures, the structural safety and durability are poor, and defects are common, among which the defects of underground continuous wall joints are particularly concentrated and serious. The joint defects of underground continuous walls as the main structure include: concrete spalling, exposed steel bars, steel bar corrosion, failure of joint drainage facilities, and insufficient strength of joints. There are two general practices: Method 1: construct a water-stop retaining structure on the outside of the underground continuous wall joint in advance, chisel out the existing damaged underground continuous wall joints, cut off the rusted steel bars, re-install the drainage system, implant steel bars, and re-construct the underground continuous wall joints. Method 2: After laying the drainage system at the underground continuous wall joints, pour a reinforced concrete secondary structure of a certain thickness to solve the problem.

[0003] However, the above two methods have the following problems: Method 1 requires the implementation of water stop and enclosure structure on the soil side of the underground continuous wall joint in advance, and the existing damaged underground continuous wall joints are chiseled out and re-cast. The implementation is difficult, the construction period is long, and the cost is high. Method 2 is to lay a drainage system on the soil side of the underground continuous wall, and then cast a reinforced concrete secondary structure, which will reduce the net width of the existing tunnel, and the secondary structure and the existing structure need to be anchored with large-diameter steel bars, which has a long construction period and high cost. Summary of the invention

[0004] The present invention provides a method for treating underground continuous wall joint defects in order to solve the problem of needing to chisel out and re-construct underground continuous wall joints, or the problem of re-constructing a drainage system and then constructing a secondary lining while occupying the structure's clearance, as well as the technical problems of long construction period and great construction difficulty.

[0005] The present invention solves the above technical problems through the following technical solutions:

[0006] The present invention provides a method for treating underground continuous wall joint defects, and the method comprises the following steps:

[0007] (1) Repair of severe water seepage / whitening cracks;

[0008] (2) Treatment of concrete spalling and exposed reinforcement;

[0009] (3) Joint drainage treatment.

[0010] In the technical scheme, in the step (1), the concrete surface to be constructed and its surroundings are first cleaned to remove surface dirt, etc., and loose, hollow and honeycomb structures are shoveled to remove stagnant water and visible water; a U-shaped groove is chiseled along the seepage / whitening crack, with a width of 5 cm and a depth of 6 cm, and the dust and debris in the groove are cleaned up. The steel bars cannot be cut off when chiseling the groove; the groove is filled with epoxy resin grouting material and the surface is smoothed; holes are drilled and grouting pipes are installed. The grouting pipes should penetrate the cracks with a spacing of 20 cm; an inclined hole is first drilled and modified polyurethane slurry is injected for water blocking treatment until the slurry fills the cracks. The vertical depth of the drilled hole should not be less than 1 / 3 of the structure thickness D; an inclined hole is drilled again, and modified epoxy resin slurry is injected for reinforcement until the cracks are filled with the slurry. Until the cracks are filled with slurry, the vertical depth of the borehole should not be less than 1 / 2 of the structure thickness D, and the drilling position and angle can be adjusted appropriately according to the direction of the cracks; the hole should be cleaned after drilling, and the hole with flowing water can be cleaned when the water becomes clear, and the hole without flowing water can be cleaned with pressurized water; install the grouting pipe in the cleaned borehole, connect the grouting pipe to the grouting pump, and slowly inject the grouting material into the grouting hole; stop grouting when the slurry seeps out from the adjacent borehole and there is no obvious leakage after grouting; when the grouting and plugging are all completed and there is no change after 12 hours of observation, use epoxy resin grouting material to fill and seal the grouting holes, and smooth the surface; after the treatment, the surface of the original tunnel structure is coated with cement-based penetrating crystalline waterproof coating with a thickness of not less than 1mm.

[0011] In the technical scheme, in the step (2), all the cracked and corroded concrete that has been repaired is chiseled off until the interface of fresh lining concrete is exposed, and the rust layer on the surface of the steel bar is removed; epoxy resin is used to seal the water leakage on the concrete surface, and after the sealing is completed, a cement-based penetrating crystalline waterproof coating is used for waterproofing. The active chemical substances contained in the cement-based penetrating crystalline waterproof coating penetrate and fill into the micropores and cracks of the concrete structure, catalyzing the multiple hydration of the cement that is not fully hydrated in the structure to form water-insoluble dendrite-like crystals, thereby improving the concrete density and achieving the purpose of sealing and waterproofing. The rust on the corroded steel bars shall be removed and the repair area shall be determined. The repair treatment range shall be expanded outward than the actual damaged range, and the thickness of the existing outermost steel bar protective layer shall not be less than 1.5 cm. The vertical edge of the concrete repair area shall be cut or chiseled out. The chiseling depth of the repair area shall be 0.5 cm below the annular main reinforcement. All loose concrete within the treatment range shall be repaired. The rust and impurities on the surface of the exposed steel bars in the repair area shall be cleaned. Then φ8×60 expansion screw holes shall be drilled at a spacing of 20×20 cm, and 80 mm long φ8 expansion bolts shall be implanted, and the exposed heads shall be 2 to 3 cm to be welded to the φ8@20×20 cm steel mesh.

[0012] In the present technical scheme, in the step (3), after the crack leakage treatment, concrete peeling, exposed reinforcement and other treatments are completed and the strength is formed, the damaged vertical drainage pipe is removed, and a vertical (or circumferential) groove installation belt is excavated on both sides of the joint of the ground-connected wall on the surface of the structure according to the designed size position. The specific length of the excavated groove should be determined according to the actual water seepage situation; a half-cut φ75mm HDPE drainage pipe is buried in the groove, and the half-cut pipe is fixed with nails and expansion screws with a spacing of 50cm; the bottom of the water pipe is grooved and buried at the junction of the bottom of the cable trench, and part of the cable trench concrete is chiseled and drilled to drain the leaked water through the φ50 HDPE drainage pipe to the tunnel drainage ditch for discharge; finally, it can be considered to set carbon fiber cloth on the inner surface of the reinforcement material repair to play a role in structural reinforcement. The carbon fiber cloth uses 300g carbon fiber and matching adhesive.

[0013] In the technical solution, in both step (1) and step (2), the concrete with seepage / whitening cracks, cracks and corrosion is removed by a concrete scraping assembly, wherein the concrete scraping assembly includes a construction assembly, a lifting mechanism is provided at the bottom of the construction assembly, a translation mechanism is fixedly installed inside the construction assembly, a scraping mechanism is provided on the top of the translation mechanism, and a collecting mechanism is fixedly installed on the top of the construction assembly located below the scraping mechanism.

[0014] In the present technical scheme, the construction assembly includes a base plate, vertical poles and a top plate. The base plate is fixedly connected to the top plate via vertical poles on all sides. Hydraulic cylinders are fixedly installed on all sides of the bottom of the base plate. The telescopic ends of the hydraulic cylinders penetrate the base plate and are fixedly connected to the lifting mechanism. The lifting mechanism consists of a base, which is fixedly connected to the telescopic end of the hydraulic cylinder. The bottom of the base is rotatably connected to the roller, and both sides of the base are fixedly connected to the limit plates. The limit plates are fitted and connected to the surfaces of the vertical poles. The inner walls of the limit plates are fixedly connected to the limit ribs, and the limit ribs are fitted and slidably engaged with the inside of the slide grooves provided on the base plate and the vertical poles.

[0015] In the technical solution, the translation mechanism includes a side plate, the side plate is fixedly installed to the top of the bottom plate between the two vertical poles, the side plate is fixedly connected to the two ends of the support plate respectively, the cross-section of the support plate is a U-shaped structure, a translation motor is fixedly installed on the top of the support plate, the output end of the translation motor is fixedly connected to an output gear, the output gear is meshed with the end gear, and the end gear is fixedly connected to one end of the long screw, the long screw is rotatably connected to the inner wall of the side plate, and the long screw is threadedly sleeved with the internal thread of the sleeve, the sleeve cross-section is a square structure and is connected to the inner wall of the slide plate The slide plate is located below the support plate, and the slide plates on both sides of the support plate are fixedly connected to the sleeve plate through guide rods. The sleeve plate is slidably connected to the bottom of the top plate, and a shell is sleeved through the sleeve plate. A reducer is fixedly installed on the top of the slide plate, and the reducer is fixedly connected to the driving motor, and the output end of the driving motor is fixedly connected to the input shaft of the reducer, and the output shaft of the reducer is fixedly connected to the crankshaft, the middle part of the crankshaft is rotatably connected to the movable shaft, and the movable shaft is fixedly connected to one end of the connecting rod.

[0016] In the present technical solution, the scraping mechanism includes a shell, a connecting seat is fixedly installed on the bottom of the shell, the connecting seat is rotatably connected to the top of the connecting rod, a frame is fixedly installed on the top of the shell, a number of evenly distributed cross plates are fixedly installed inside the frame, and the surface of the cross plate is fixedly connected to the scraping teeth for scraping concrete at the joints of underground continuous walls, a partition is fixedly installed inside the frame, a crushing roller is rotatably connected inside the frame on one side of the partition, a guide plate is fixedly installed on the side wall of the partition located on the top of the crushing roller, and both ends of the crushing roller are fixedly connected to transmission gears located on the outside of the frame.

[0017] In the present technical solution, a limit rod is fixedly installed on the bottom of the frame, and the limit rod is inserted through the inside of the limit rod, the gear rod is meshed with the transmission gear, and a connecting plate is fixedly connected to the bottom of the gear rod, the connecting plate is fit-connected with the top surface of the top plate, the middle part of the top plate is inserted through the shell, and an opening for horizontal movement of the shell is opened in the middle part of the top plate, the shell and the surface of the frame are fixedly connected to the water supply pipe, a spray pipe is fixedly installed on the top of the water supply pipe, and a plurality of nozzles corresponding to the scraping teeth are provided on one side of the spray pipe.

[0018] In the present technical solution, the collecting mechanism includes a collecting trough, which is slidably connected to the surface of the top plate, and the side walls at both ends of the collecting trough are fixedly connected to the guide rod, and the guide rod is inserted through the inside of the limit block, and a connecting plate is provided between the guide rod and the top plate, one end of the guide rod is connected to the fixed seat through a spring, and the fixed seat and the limit block are fixedly connected to the top surface of the top plate, and the collecting trough is correspondingly arranged below the frame, and the bottom of the collecting trough is connected to the inside of the shell through a second hose, and an inclined net frame is fixedly installed inside the shell, and a cover plate is hinged on the outer wall of the shell located on one side of the net frame, and the second hose is located above the net frame, and a water pump is fixedly installed at the bottom of the top plate, and the water pump is respectively connected to the bottom of the water supply pipe and the bottom of the shell through the first hose.

[0019] On the basis of being in accordance with the common sense in the art, the above-mentioned preferred conditions can be arbitrarily combined to obtain the preferred embodiments of the present invention.

[0020] The positive and progressive effects of the present invention are:

[0021] The above-mentioned method for treating defects in underground continuous wall joints can achieve the repair of severe water seepage / whitening cracks at underground continuous wall joints and the treatment of various joint defects such as concrete peeling and exposed reinforcement. It solves the problem of needing to chisel out and re-construct underground continuous wall joints, or solves the problem of re-constructing the drainage system and then applying secondary lining when the structural clearance is occupied. The construction components are used to scrape the concrete at the joints of the underground continuous wall, which can achieve rapid cleaning of the concrete to facilitate the treatment of defects and improve construction efficiency. It can also perform rapid construction according to actual conditions, solve the problem of difficult rapid construction of high joints of underground continuous walls, and crush the concrete while scraping the concrete to facilitate subsequent collection and treatment. The dust diffusion problem during construction is solved by the collection mechanism, which improves the construction quality and ensures the high efficiency and durability of the treatment of defects at the joints of the continuous wall. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 Schematic diagram of the treatment method of the present invention.

[0023] Figure 2 It is a schematic diagram of the overall three-dimensional structure of the present invention.

[0024] Figure 3 It is a schematic diagram of the internal side structure of the present invention.

[0025] Figure 4 It is a schematic diagram of the internal front view structure of the present invention.

[0026] Figure 5 It is a schematic diagram of the top plate structure of the present invention from above.

[0027] Figure 6 It is a schematic diagram of the top view of the frame of the present invention.

[0028] Figure 7 It is a schematic diagram of the three-dimensional structure of the support plate of the present invention.

[0029] Figure 8 It is a schematic diagram of the three-dimensional structure of the shaft sleeve of the present invention.

[0030] Fig. 9 It is a schematic diagram of the three-dimensional structure of the crankshaft of the present invention.

[0031] Fig.10 It is a schematic diagram of the internal three-dimensional structure of the shell of the present invention.

[0032] Description of Reference Numerals

[0033] 101, bottom plate; 102, vertical pole; 103, top plate; 104, hydraulic cylinder; 105, side plate; 106, support plate; 107, translation motor; 108, output gear; 109, end gear; 110, long screw; 111, bushing; 112, slide plate; 113, reducer; 114, driving motor; 115, crankshaft; 116, movable shaft; 117, connecting rod; 118, guide rod; 119, sleeve plate;

[0034] 201, shell; 202, connecting seat; 203, cover plate; 204, mesh frame; 205, frame; 206, water supply pipe; 207, spray pipe; 208, horizontal plate; 209, scraper; 210, partition; 211, guide plate; 212, crushing roller; 213, transmission gear; 214, limit rod; 215, water pump; 216, first hose;

[0035] 301, fixing seat; 302, spring; 303, guide rod; 304, limit block; 305, collecting tank; 306, second hose; 307, connecting plate; 308, gear rod;

[0036] 401, base; 402, roller; 403, limit plate; 404, limit rib. DETAILED DESCRIPTION

[0037] The present invention is further described below by way of examples, but the present invention is not limited to the scope of the examples.

[0038] like Figure 1 As shown, the method for treating underground continuous wall joint defects comprises the following steps:

[0039] (1) Repair of severe water seepage / whitening cracks;

[0040] (2) Treatment of concrete spalling and exposed reinforcement;

[0041] (3) Joint drainage treatment.

[0042] In the technical scheme, in the step (1), the concrete surface to be constructed and its surroundings are first cleaned to remove surface dirt, etc., and loose, hollow and honeycomb structures are shoveled to remove stagnant water and visible water; a U-shaped groove is chiseled along the seepage / whitening crack, with a width of 5 cm and a depth of 6 cm, and the dust and debris in the groove are cleaned up. The steel bars cannot be cut off when chiseling the groove; the groove is filled with epoxy resin grouting material and the surface is smoothed; holes are drilled and grouting pipes are installed. The grouting pipes should penetrate the cracks with a spacing of 20 cm; an inclined hole is first drilled and modified polyurethane slurry is injected for water blocking treatment until the slurry fills the cracks. The vertical depth of the drilled hole should not be less than 1 / 3 of the structure thickness D; an inclined hole is drilled again, and modified epoxy resin slurry is injected for reinforcement until the cracks are filled with the slurry. Until the cracks are filled with slurry, the vertical depth of the borehole should not be less than 1 / 2 of the structure thickness D, and the drilling position and angle can be adjusted appropriately according to the direction of the cracks; the hole should be cleaned after drilling, and the hole with flowing water can be cleaned when the water becomes clear, and the hole without flowing water can be cleaned with pressurized water; install the grouting pipe in the cleaned borehole, connect the grouting pipe to the grouting pump, and slowly inject the grouting material into the grouting hole; stop grouting when the slurry seeps out from the adjacent borehole and there is no obvious leakage after grouting; when the grouting and plugging are all completed and there is no change after 12 hours of observation, use epoxy resin grouting material to fill and seal the grouting holes, and smooth the surface; after the treatment, the surface of the original tunnel structure is coated with cement-based penetrating crystalline waterproof coating with a thickness of not less than 1mm.

[0043] In the technical scheme, in the step (2), all the cracked and corroded concrete that has been repaired is chiseled off until the interface of fresh lining concrete is exposed, and the rust layer on the surface of the steel bar is removed; epoxy resin is used to seal the water leakage on the concrete surface, and after the sealing is completed, a cement-based penetrating crystalline waterproof coating is used for waterproofing. The active chemical substances contained in the cement-based penetrating crystalline waterproof coating penetrate and fill into the micropores and cracks of the concrete structure, catalyzing the multiple hydration of the cement that is not fully hydrated in the structure to form water-insoluble dendrite-like crystals, thereby improving the concrete density and achieving the purpose of sealing and waterproofing. The rust on the corroded steel bars shall be removed and the repair area shall be determined. The repair treatment range shall be expanded outward than the actual damaged range, and the thickness of the existing outermost steel bar protective layer shall not be less than 1.5 cm. The vertical edge of the concrete repair area shall be cut or chiseled out. The chiseling depth of the repair area shall be 0.5 cm below the annular main reinforcement. All loose concrete within the treatment range shall be repaired. The rust and impurities on the surface of the exposed steel bars in the repair area shall be cleaned. Then φ8×60 expansion screw holes shall be drilled at a spacing of 20×20 cm, and 80 mm long φ8 expansion bolts shall be implanted, and the exposed heads shall be 2 to 3 cm to be welded to the φ8@20×20 cm steel mesh.

[0044] In the present technical scheme, in the step (3), after the crack leakage treatment, concrete peeling, exposed reinforcement and other treatments are completed and the strength is formed, the damaged vertical drainage pipe is removed, and a vertical (or circumferential) groove installation belt is excavated on both sides of the joint of the ground-connected wall on the surface of the structure according to the designed size position. The specific length of the excavated groove should be determined according to the actual water seepage situation; a half-cut φ75mm HDPE drainage pipe is buried in the groove, and the half-cut pipe is fixed with nails and expansion screws with a spacing of 50cm; the bottom of the water pipe is grooved and buried at the junction of the bottom of the cable trench, and part of the cable trench concrete is chiseled and drilled to drain the leaked water through the φ50 HDPE drainage pipe to the tunnel drainage ditch for discharge; finally, it can be considered to set carbon fiber cloth on the inner surface of the reinforcement material repair to play a role in structural reinforcement. The carbon fiber cloth uses 300g carbon fiber and matching adhesive.

[0045] like Figure 2-10 As shown, in the present technical solution, in both step (1) and step (2), the concrete scraping assembly is used to remove the water seepage / whitening cracks, cracks, and corroded concrete, wherein the concrete scraping assembly includes a construction assembly, a lifting mechanism is provided at the bottom of the construction assembly, a translation mechanism is fixedly installed inside the construction assembly, a scraping mechanism is provided on the top of the translation mechanism, and a collecting mechanism is fixedly installed on the top of the construction assembly located below the scraping mechanism.

[0046] In the present technical solution, the construction assembly includes a bottom plate 101, a vertical pole 102 and a top plate 103. The bottom plate 101 is fixedly connected to the top plate 103 via the vertical pole 102. A hydraulic cylinder 104 is fixedly installed around the bottom of the bottom plate 101. The telescopic end of the hydraulic cylinder 104 penetrates the bottom plate 101 and is fixedly connected to the lifting mechanism. The construction assembly can be raised by the telescopic end of the hydraulic cylinder 104, and the height can be adjusted during construction. The lifting mechanism consists of a base 401. The base 401 is fixedly connected to the telescopic end of the hydraulic cylinder 104, the bottom of the base 401 is rotatably connected to the roller 402, and both sides of the base 401 are fixedly connected to the limit plates 403, the limit plates 403 are fitted and connected to the surface of the vertical pole 102, the inner wall of the limit plate 403 is fixedly connected to the limit rib 404, and the limit rib 404 is slidably engaged with the inside of the slide groove provided in the bottom plate 101 and the vertical pole 102, and the stable lifting and lowering of the construction component is ensured by the limit rib 404.

[0047] In the present technical solution, the translation mechanism includes a side plate 105, the side plate 105 is fixedly installed to the top of the bottom plate 101 between the two uprights 102, the side plate 105 is fixedly connected to the two ends of the support plate 106, the cross-section of the support plate 106 is a U-shaped structure, a translation motor 107 is fixedly installed on the top of the support plate 106, the output end of the translation motor 107 is fixedly connected to an output gear 108, the output gear 108 is meshed with the end gear 109, and the end The face gear 109 is fixedly connected to one end of the long screw 110, the long screw 110 is rotatably connected to the inner wall of the side plate 105, and the long screw 110 is threadedly sleeved with the inner surface of the shaft sleeve 111. The shaft sleeve 111 has a square cross-section and slides vertically inside the slide plate 112. The slide plate 112 is slidably connected to the surface of the bottom plate 101. The slide plate 112 is located below the support plate 106. The slide plates 112 located on both sides of the support plate 106 are fixedly connected to the sleeve plate 119 through guide rods 118. The sleeve plate 119 is slidably connected to the bottom of the top plate 103, and the sleeve plate 119 is penetrated and sleeved with a housing 201. A reducer 113 is fixedly installed on the top of the slide plate 112. The reducer 113 is fixedly connected to the drive motor 114. The output end of the drive motor 114 is fixedly connected to the input shaft of the reducer 113, and the output shaft of the reducer 113 is fixedly connected to the crankshaft 115. The middle part of the crankshaft 115 is rotatably connected to the movable shaft 116, and the movable shaft 11 6 is fixedly connected to one end of the connecting rod 117. When the long screw 110 rotates, it can drive the sleeve 111 to translate, and drive the slide plate 112 to move between the support plate 106 and the bottom plate 101, thereby realizing the translation function. The crankshaft 115 and the movable shaft 116 are used to cooperate to realize the rotation of the connecting rod 117, thereby driving the scraping mechanism to move back and forth. When the slide plate 112 moves, it drives the guide rod 118 and the sleeve plate 119 to move, so that the scraping mechanism is limited by the sleeve plate 119 when it moves back and forth, ensuring stable movement.

[0048] In the present technical solution, the scraping mechanism includes a shell 201, a connecting seat 202 is fixedly installed at the bottom of the shell 201, and the connecting seat 202 is rotatably connected to the top of the connecting rod 117. A frame 205 is fixedly installed on the top of the shell 201, and a plurality of evenly distributed horizontal plates 208 are fixedly installed inside the frame 205. The surface of the horizontal plate 208 is fixedly connected to the scraping teeth 209 for scraping concrete at the joints of the underground continuous wall. A partition 210 is fixedly installed inside the frame 205. A crushing roller 212 is rotatably connected inside the frame 205 on one side of the partition 210, and a guide plate 211 is fixedly installed on the side wall of the partition 210 located on the top of the crushing roller 212. Both ends of the crushing roller 212 are fixedly connected to a transmission gear 213 located on the outside of the frame 205. The scraping teeth 209 inside the frame 205 are used to scrape the concrete at the joint, so that larger concrete enters the frame 205 from the cross plate 208 for collection, and the concrete is crushed and collected through the rotation of the crushing roller 212.

[0049] In the present technical solution, a limit rod 214 is fixedly installed at the bottom of the frame 205, and the limit rod 214 is inserted through the toothed rod 308, and the toothed rod 308 is meshed with the transmission gear 213, and a connecting plate 307 is fixedly connected to the bottom of the toothed rod 308, and the connecting plate 307 is connected to the top surface of the top plate 103, and the middle of the top plate 103 is inserted through the shell 201, and the middle of the top plate 103 is provided with an opening for the horizontal movement of the shell 201, and the shell 201 and the frame 205 are connected. The surfaces are fixedly connected to the water supply pipe 206, a spray pipe 207 is fixedly installed on the top of the water supply pipe 206, and a plurality of nozzles corresponding to the scraping teeth 209 are provided on one side of the spray pipe 207. When the frame 205 moves back and forth, the transmission gear 213 moves on the gear rod 308. At this time, the transmission gear 213 drives the crushing roller 212 to rotate. When the frame 205 moves upward, the connecting plate 307 is restricted by the guide rod 303 to realize the reverse rotation of the transmission gear 213, and the concrete is crushed into fine particles that fall into the inside of the shell 201.

[0050] In the present technical solution, the collecting mechanism includes a collecting tank 305, the collecting tank 305 is slidably connected to the surface of the top plate 103, the side walls at both ends of the collecting tank 305 are fixedly connected to the guide rod 303, and the guide rod 303 is inserted through the inside of the limit block 304, a connecting plate 307 is provided between the guide rod 303 and the top plate 103, one end of the guide rod 303 is connected to the fixing seat 301 through a spring 302, and the fixing seat 301 and the limit block 304 are fixedly connected to the top surface of the top plate 103, the collecting tank 305 is correspondingly arranged below the frame 205, the bottom of the collecting tank 305 is connected to the inside of the shell 201 through a second hose 306, the An inclined mesh frame 204 is fixedly installed inside the shell 201, and a cover plate 203 is hingedly connected to the outer wall of the shell 201 on one side of the mesh frame 204. The second hose 306 is located above the mesh frame 204. A water pump 215 is fixedly installed at the bottom of the top plate 103. The water pump 215 is connected to the bottom of the water supply pipe 206 and the bottom of the shell 201 through the first hose 216 respectively. The collecting trough 305 is used to collect fallen concrete fragments and can ensure that it is always in contact with the wall surface of the continuous wall, and the concrete and sewage are transported to the inside of the shell 201 through the second hose 306 for collection, and solid-liquid separation is achieved through the mesh frame 204, which is convenient for subsequent processing.

[0051] The present invention is not limited to the above-mentioned embodiments. Any changes in shape or structure are within the protection scope of the present invention. The protection scope of the present invention is defined by the attached claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principle and essence of the present invention, but these changes and modifications are within the protection scope of the present invention.

Claims

1. A method for treating underground continuous wall joint defects, characterized in that: The treatment method comprises the following steps: (1) Repair of severe water seepage / whitening cracks; (2) Treatment of concrete spalling and exposed reinforcement; (3) Joint drainage treatment.

2. A method for treating underground continuous wall joint defects as claimed in claim 1, characterized in that: In the step (1), the concrete surface to be constructed and its surroundings are first cleaned to remove surface dirt, etc., and loose, hollow and honeycomb structures are removed, and stagnant water and visible water are removed; a U-shaped groove is chiseled along the seepage / whitening crack, with a width of 5 cm and a depth of 6 cm, and the floating dust and debris in the groove are cleaned. The steel bars cannot be cut off when chiseling the groove; the groove is filled with epoxy resin grouting material and the surface is smoothed; Drill holes and install grouting pipes. The grouting pipes should penetrate the cracks with a spacing of 20 cm. Drill inclined holes first and inject modified polyurethane slurry for water blocking until the cracks are filled with slurry. The vertical depth of the drilled hole should not be less than 1 / 3 of the structure thickness D. Drill inclined holes again and inject modified epoxy resin slurry for reinforcement until the cracks are filled with slurry. The vertical depth of the drilled hole should not be less than 1 / 2 of the structure thickness D. The drilling position and angle can be adjusted appropriately according to the direction of the cracks. After drilling, the hole should be cleaned and the hole with flowing water should be left for water to flow. For holes without flowing water, the mortar in the holes can be cleaned with pressurized water; install the grouting pipe in the cleaned borehole, connect the grouting pipe to the grouting pump, and slowly inject the grouting material into the grouting hole; stop grouting when the slurry seeps out from the adjacent borehole and there is no obvious leakage after grouting and plugging; when the grouting and plugging are all completed and there is no change after 12 hours of observation, use epoxy resin grouting material to fill and seal the grouting holes, and smooth the surface; after the treatment, apply cement-based penetrating crystalline waterproof coating with a thickness of not less than 1mm on the surface of the original tunnel structure.

3. A method for treating underground continuous wall joint defects as claimed in claim 1, characterized in that: In the step (2), all the cracked and corroded concrete that has been repaired is chiseled off until the interface of fresh lining concrete is exposed, and the rust layer on the surface of the steel bar is removed; epoxy resin is used to seal the water leakage on the concrete surface, and after the sealing is completed, a cement-based penetrating crystalline waterproof coating is used for waterproofing. The active chemical substances contained in the cement-based penetrating crystalline waterproof coating penetrate and fill the micropores and cracks of the concrete structure, catalyzing the multiple hydration of the cement that is not fully hydrated in the structure to form water-insoluble dendrite-like crystals, thereby improving the concrete density and achieving the purpose of sealing and waterproofing; Derust the steel bars and determine the repair area. The repair treatment range should be expanded outward than the actual damaged range, with the thickness of the existing outermost steel bar protective layer being no less than 1.5 cm. Cut or chisel out the vertical edge of the concrete repair area. The chiseling depth of the repair area is 0.5 cm below the annular main reinforcement. Carry out all loose concrete within the treatment range, clean the rust and impurities on the surface of the exposed steel bars in the repair area, and then drill φ8×60 expansion screw holes at a spacing of 20×20 cm, implant 80 mm long φ8 expansion bolts, and expose 2 to 3 cm to weld to the φ8@20×20 cm steel mesh.

4. A method for treating underground continuous wall joint defects as claimed in claim 1, characterized in that: In the step (3), after the crack leakage treatment, concrete peeling, exposed reinforcement and other treatments are completed and the strength is formed, the damaged vertical drainage pipe is removed, and a vertical (or circumferential) groove installation belt is excavated on both sides of the joint of the ground-connected wall on the surface of the structure according to the designed size. The specific length of the excavated groove should be determined according to the actual water seepage situation; a half-cut φ75mm HDPE drainage pipe is buried in the groove, and the half-cut pipe is fixed with nails and expansion screws with a spacing of 50cm; the bottom of the water pipe is grooved and buried at the junction of the bottom of the cable trench, and part of the cable trench concrete is chiseled and drilled to drain the leaked water through the φ50 HDPE drainage pipe to the tunnel drainage ditch for discharge; finally, it can be considered to set carbon fiber cloth on the inner surface of the reinforcement material repair to play a role in structural reinforcement. The carbon fiber cloth uses 300g carbon fiber and matching adhesive.

5. A method for treating underground continuous wall joint defects as claimed in claim 1, characterized in that: In both step (1) and step (2), the concrete with seepage / whitening cracks, cracks and corrosion is removed by a concrete scraping assembly, wherein the concrete scraping assembly includes a construction assembly, a lifting mechanism is provided at the bottom of the construction assembly, a translation mechanism is fixedly installed inside the construction assembly, a scraping mechanism is provided on the top of the translation mechanism, and a collecting mechanism is fixedly installed on the top of the construction assembly located below the scraping mechanism.

6. A method for treating underground continuous wall joint defects as claimed in claim 5, characterized in that: The construction assembly comprises a bottom plate (101), a vertical pole (102) and a top plate (103); the bottom plate (101) is fixedly connected to the top plate (103) via the vertical pole (102) on all sides; hydraulic cylinders (104) are fixedly installed on all sides of the bottom of the bottom plate (101); the telescopic end of the hydraulic cylinder (104) penetrates the bottom plate (101) and is fixedly connected to a lifting mechanism; the lifting mechanism is composed of a base (401); the base (401) The base (401) is fixedly connected to the telescopic end of the hydraulic cylinder (104); the bottom of the base (401) is rotatably connected to the roller (402); both sides of the base (401) are fixedly connected to the limit plates (403); the limit plates (403) are fitted and connected to the surface of the vertical pole (102); the inner wall of the limit plate (403) is fixedly connected to the limit rib (404); and the limit rib (404) is fitted and slidably engaged with the inside of the slide grooves provided in the bottom plate (101) and the vertical pole (102).

7. A method for treating underground continuous wall joint defects as claimed in claim 5, characterized in that: The translation mechanism comprises a side plate (105), wherein the side plate (105) is fixedly mounted to the top of the bottom plate (101) between the two vertical poles (102), and the side plate (105) is respectively fixedly connected to the two ends of a support plate (106), wherein the cross section of the support plate (106) is a U-shaped structure, and a translation motor (107) is fixedly mounted on the top of the support plate (106), and an output gear (108) is fixedly connected to the output end of the translation motor (107), wherein the output gear (108) is meshingly connected to an end face gear (109), and the end face gear (109) is fixedly connected to one end of a long screw rod (110), wherein the long screw rod (110) is rotationally connected to the inner wall of the side plate (105), and wherein the long screw rod (110) is threadedly sleeved with the inner part of a shaft sleeve (111), wherein the cross section of the shaft sleeve (111) is a square structure and vertically slides with the inside of a slide plate (112), and wherein the slide plate ( The slide plate (112) is slidably connected to the surface of the bottom plate (101), the slide plate (112) is located below the support plate (106), the slide plates (112) located on both sides of the support plate (106) are fixedly connected to the sleeve plate (119) through guide rods (118), the sleeve plate (119) is slidably connected to the bottom of the top plate (103), and a shell (201) is sleeved through the inside of the sleeve plate (119), a reducer (113) is fixedly installed on the top of the slide plate (112), the reducer (113) is fixedly connected to the driving motor (114), the output end of the driving motor (114) is fixedly connected to the input shaft of the reducer (113), and the output shaft of the reducer (113) is fixedly connected to the crankshaft (115), the middle part of the crankshaft (115) is rotatably connected to the movable shaft (116), and the movable shaft (116) is fixedly connected to one end of the connecting rod (117).

8. A method for treating underground continuous wall joint defects as claimed in claim 5, characterized in that: The scraping mechanism comprises a shell (201), a connecting seat (202) is fixedly installed at the bottom of the shell (201), the connecting seat (202) is rotatably connected to the top of the connecting rod (117), a frame (205) is fixedly installed at the top of the shell (201), a plurality of evenly distributed transverse plates (208) are fixedly installed inside the frame (205), and the surface of the transverse plates (208) is fixedly connected to the scraping teeth (209) for scraping concrete at the joints of underground continuous walls, a partition (210) is fixedly installed inside the frame (205), a crushing roller (212) is rotatably connected inside the frame (205) on one side of the partition (210), a guide plate (211) is fixedly installed on the side wall of the partition (210) located at the top of the crushing roller (212), and both ends of the crushing roller (212) are fixedly connected to transmission gears (213) located outside the frame (205).

9. A method for treating underground continuous wall joint defects as claimed in claim 8, characterized in that: A limit rod (214) is fixedly installed at the bottom of the frame (205), and the inside of the limit rod (214) is inserted through the tooth rod (308), and the tooth rod (308) is meshed with the transmission gear (213). A connecting plate (307) is fixedly connected to the bottom of the tooth rod (308), and the connecting plate (307) is fitted and connected to the top surface of the top plate (103). The middle of the top plate (103) is inserted through the shell (201), and an opening for horizontal movement of the shell (201) is provided in the middle of the top plate (103). The surfaces of the shell (201) and the frame (205) are fixedly connected to the water supply pipe (206), and a spray pipe (207) is fixedly installed on the top of the water supply pipe (206), and a plurality of nozzles distributed corresponding to the scraping teeth (209) are provided on one side of the spray pipe (207).

10. A method for treating underground continuous wall joint defects as claimed in claim 5, characterized in that: The collecting mechanism comprises a collecting groove (305), the collecting groove (305) is slidably connected to the surface of the top plate (103), the side walls at both ends of the collecting groove (305) are fixedly connected to the guide rod (303), and the guide rod (303) and the limit block (304) are inserted through the inside, a connecting plate (307) is provided between the guide rod (303) and the top plate (103), one end of the guide rod (303) is connected to the fixing seat (301) through a spring (302), and the fixing seat (301) and the limit block (304) are fixedly connected to the top surface of the top plate (103), and the collecting groove (305) is correspondingly provided Below the frame (205), the bottom of the collecting tank (305) is connected to the inside of the shell (201) through a second hose (306); an inclined screen frame (204) is fixedly installed inside the shell (201); a cover plate (203) is hingedly connected to the outer wall of the shell (201) located on one side of the screen frame (204); the second hose (306) is located above the screen frame (204); a water pump (215) is fixedly installed at the bottom of the top plate (103); and the water pump (215) is respectively connected to the bottom of the water supply pipe (206) and the bottom of the shell (201) through a first hose (216).

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