Method and device for repairing anti-floating structure with raised bottom plate

Abstract

The device comprises a permeable steel casing, a drilling machine and a counter-force frame, the permeable steel casing is provided with a permeable steel casing window and a permeable hole, a base is arranged at the bottom of the drilling machine, the drilling machine can be installed in the permeable steel casing through the base, and the counter-force frame is connected with the permeable steel casing window. And a turntable is arranged on the base. The high-pressure jet flow soil sampling rod on the drilling machine can rotate by 360 degrees, spouted high-pressure water makes raised soil below a bottom plate into slurry, the slurry is discharged into the permeable steel casing and pumped out of the ground through a slurry pump, a raised area of the bottom plate is emptied and then pressurized through a jack to restore to the original position, the slurry is replaced with the cement slurry, and a new bottom plate bearing layer is formed after reinforcement. The permeable steel casing for soil sampling is transformed into the dewatering well, the underground water level is controlled below the bottom surface of the basement bottom plate all the time through linkage of the automatic water level gauge and the water pump, and the problem that the underground water level of the basement bottom plate swells in extreme weather to cause damage and failure of an anti-floating structure again is solved.

Description

Technical Field

[0001] The invention belongs to the technical field of anti-floating of underground engineering, and in particular relates to a method and a device for repairing an anti-floating structure with a raised bottom plate. Background Art

[0002] The anti-floating design of urban buildings and underground projects involves the game between the anti-floating safety factor and the construction cost. The determination of the anti-floating defense water level, an important design parameter that affects the anti-floating safety, is a difficult problem that currently plagues the engineering community. Due to the uncertainty of the groundwater level, frequent extreme weather disasters, and frequent floods above the warning level in rivers and lakes, the groundwater level rises sharply. When the groundwater level exceeds the basement defense water level, basement floor floating accidents are likely to occur.

[0003] When a basement floor floats up, the basement and the upper structure may have been partially or completely completed. The basement floor bulges and cracks due to the floating, and the foundation soil bulges along with it. If the bulged foundation soil is not removed, the floating floor cannot be restored to its original position. Existing repair devices are difficult to remove the bulged foundation soil, making it difficult to repair the cracks and prevent the floor from floating up again. Therefore, we propose a method and device for repairing an anti-floating structure with a bulged floor. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a method and device for repairing an anti-floating structure with a raised base plate, by drilling holes at the locations where cracks and raised base plates are formed, installing permeable steel casings, and using horizontal high-pressure jet soil drilling rods to spray high-pressure water to make mud from the raised soil under the base plate and drain it away. After all the loose soil is removed, a hollow area is formed, and a reaction frame and a jack are used to restore the raised area of ​​the base plate to its original position, and structural adhesive is poured into the cracks to repair the basement base plate. After the basement base plate is reset, cement slurry is poured into the remaining hollow area to replace the mud. Through the automatic drainage system of the precipitation well transformed from the permeable steel casing, the groundwater level is controlled below the bottom of the basement base plate, thereby realizing the repair of the basement basement base plate.

[0005] The present invention is achieved as follows: a device for repairing an anti-floating structure with a raised bottom plate comprises a permeable steel casing, a drilling rig and a reaction frame, wherein the permeable steel casing is provided with a permeable steel casing window and a water-permeable hole, a base is provided at the bottom of the drilling rig, the drilling rig can be installed inside the permeable steel casing through the base, a turntable is provided on the base, the base and the turntable are connected by a bearing, a high-pressure jet soil drilling rod is provided on the drilling rig, the reaction frame is fixed to the surrounding basement columns by a clamp, a jack is provided on the reaction frame, the jack applies pressure to the hollowed area of ​​the raised basement bottom plate, so that the basement bottom plate can be restored to its original position.

[0006] Optionally, the upper part of the permeable steel casing is impermeable, the permeable steel casing window is opened in the middle position of the permeable steel casing, the permeable holes are opened in the lower position of the permeable steel casing, and the permeable holes are arranged in a plum blossom shape, and the bottom end of the permeable steel casing is an open structure.

[0007] Optionally, a diesel generator is provided on the top of the turntable, and the diesel generator is connected to the high-pressure jet soil drilling rod through a transmission device. The transmission device includes a drill rod claw and a guide rail. The drill rod claw is provided on the outside of the high-pressure jet soil drilling rod, and the high-pressure jet soil drilling rod is slidably connected to the guide rail.

[0008] Optionally, a spiral blade drill bit is installed at the head of the high-pressure jet soil drilling rod, the top of the spiral blade drill bit is a cone and is provided with a nozzle, and nozzles are also provided around the high-pressure jet soil drilling rod.

[0009] Optionally, a steel bull leg is installed above the clamp, and the jack is installed at the bottom of the reaction frame.

[0010] Optionally, an inner tube is arranged inside the permeable steel casing, and graded gravel is arranged between the permeable steel casing and the inner tube. The permeable steel casing, the inner tube and the graded gravel form a precipitation well composite structure, and a water pump, a drainage pipe, an automatic water level gauge and a steel well cover are installed inside the inner tube to form a drainage automatic control system.

[0011] Optionally, the sensor of the automatic water level gauge in the drainage automatic control system is buried below the waterproof layer on the bottom surface of the basement floor, and the automatic water level gauge is electrically connected to the water pump.

[0012] Optionally, a method for repairing an anti-floating structure with raised bottom plate comprises the following steps: S1. Determine the location of the hole in the basement floor, break the concrete of the floor, install the permeable steel casing, take soil and sink the permeable steel casing; S2. Install a drilling rig in the permeable steel casing, align the high-pressure jet soil extraction drill rod with the window of the permeable steel casing, rotate horizontally, and spray high-pressure water to make the soil into mud and discharge it to form a hollow area; S3. Install the reaction frame and use the jack to pressurize the hollowed-out area of ​​the basement floor so that the basement floor returns to its original position; S4. A groove is opened along the crack of the bottom plate, and an oblique drill hole is opened on the side of the groove to penetrate the deep part of the crack of the bottom plate, and then structural glue is poured into the oblique drill hole to seal it. A water stop strip is placed in the groove, and then it is sealed with waterproof mortar; S5. Use window sealing plates to seal the windows of the permeable steel casing, weld external threaded pipes through the reserved grouting holes, insert grouting pipes, and pour cement slurry into the remaining hollowed-out area after the basement floor is reset to replace the slurry to form a new foundation bearing layer; S6. Transform the permeable steel casing used for soil extraction into a composite structure of a precipitation well, and install a drainage automatic control system in the composite structure of the precipitation well; S7. Repair the damaged basement floor at the permeable steel casing.

[0013] Compared with the prior art, the present invention has the following beneficial effects: 1. A rotatable turntable is installed on the base of the drilling rig of the present invention, so that the high-pressure jet soil sampling rod can rotate 360 ​​degrees. The high-pressure water sprayed out will make the raised soil under the bottom plate into mud and discharge it into the permeable steel casing. The mud pump will pump it out of the ground. After the raised area of ​​the bottom plate is hollowed out, it can be restored to its original position by pressurizing it with a jack.

[0014] 2. The present invention replaces mud with cement slurry to form a new bottom plate bearing layer after reinforcement.

[0015] 3. The present invention transforms the permeable steel casing used for soil extraction into a precipitation well, and controls the groundwater level below the bottom surface of the basement floor through the linkage of an automatic water level gauge and a water pump, thereby solving the problem of the anti-floating structure being damaged and failing again due to a sudden rise in the groundwater level of the basement floor in extreme weather.

[0016] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of water gushing from the basement floor slab bulging and cracking provided by the present invention; Figure 2 It is a schematic diagram of taking soil from under the basement floor to make mud provided by the present invention; Figure 3 It is a schematic diagram of the structure of the water-permeable steel casing provided by the present invention; Figure 4 It is a partial structural schematic diagram of the high-pressure jet soil drilling rod provided by the present invention; Figure 5 It is a schematic diagram of the coverage range of a high-pressure jet soil drilling rod provided by the present invention in a window; Figure 6 It is a schematic diagram of the reaction frame provided by the present invention pressurizing and resetting the bottom plate; Figure 7 yes Figure 6 A schematic diagram of the local enlarged structure at point A in the middle; Figure 8 It is a schematic diagram of sealing a water-permeable steel casing window with a steel plate provided by the present invention; Fig. 9 It is a schematic diagram of replacing mud by pouring cement slurry into the hollowed area under the basement floor provided by the present invention; Fig.10 It is a schematic diagram of sealing the hollowed-out area under the basement floor provided by the present invention by pouring cement slurry; Fig.11 It is a schematic diagram of the connection structure between the precipitation well and the basement floor provided by the present invention; Fig.12 yes Fig.11 A schematic diagram of the local enlarged structure at B in the middle; Fig.13 The present invention is a schematic structural diagram of a high-pressure jet soil drilling rod and a drilling rig provided by the present invention.

[0018] In the figure: 1. Basement floor; 101. Floor concrete; 102. Grouting layer; 103. Floor longitudinal reinforcement; 104. Floor transverse reinforcement; 105. Welding point; 106. Sealing concrete; 107. Waterproof layer; 2. Engineering piles; 201. Capping platform; 202. Basement column; 3. Water gushing point; 301. Floor crack; 302. Grooving; 303. Oblique drilling hole; 304. Water stop strip; 305. Waterproof mortar; 4. Permeable steel casing; 401. Permeable hole; 402. Steel strip; 403. Permeable steel casing window; 404. Permeable steel casing wall; 405. Mud; 406. Screw hole; 407. Screw; 408. Window Sealing plate; 409, grouting hole; 5, drilling rig; 501, base; 502, turntable; 503, high-pressure jet soil drilling rod; 504, nozzle; 505, spiral blade drill bit; 506, diesel generator; 507, transmission device; 508, drill rod clamp; 509, guide rail; 6, inner tube; 601, inner tube water permeable hole; 602, water pump; 603, drainage pipe; 604, steel manhole cover; 605, graded crushed stone; 606, water-stop steel plate; 607, automatic water level gauge; 7, reaction frame; 701, jack; 702, clamp; 703, steel corbel; 8, grouting pipe; 801, external threaded pipe; 802, nut cover. DETAILED DESCRIPTION

[0019] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0020] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0021] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0022] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0023] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0024] The structure of the present invention is described in detail below in conjunction with the accompanying drawings.

[0025] like Figures 1 to 13 As shown, an anti-floating structure repair device for a raised bottom plate provided in an embodiment of the present invention comprises a permeable steel casing 4, a drilling rig 5 and a reaction frame 7. The permeable steel casing 4 is provided with a permeable steel casing window 403 and a permeable hole 401. A base 501 is provided at the bottom of the drilling rig 5. The drilling rig 5 can be installed inside the permeable steel casing 4 through the base 501. A turntable 502 is provided on the base 501. The base 501 and the turntable 502 are connected by a bearing. A high-pressure jet soil drilling rod 503 is provided on the drilling rig 5. The reaction frame 7 is fixed to the surrounding basement columns 202 by clamps 702. A jack 701 is provided on the reaction frame 7. The jack 701 applies pressure to the hollowed area of ​​the raised basement bottom plate 1, so that the basement bottom plate 1 can be restored to its original position.

[0026] Furthermore, the upper part of the permeable steel casing 4 is impermeable, the permeable steel casing window 403 is opened in the middle position of the permeable steel casing 4, the permeable holes 401 are opened in the lower position of the permeable steel casing 4, and the permeable holes 401 are arranged in a plum blossom shape, and the bottom end of the permeable steel casing 4 is an open structure.

[0027] The permeable steel casing 4 is installed at the highest part of the uplift of the basement floor 1, and the top surface of the permeable steel casing 4 is driven into the bottom surface of the basement floor 1. The diameter of the permeable steel casing 4 is more than 2.5m, which is convenient for the drilling rig 5 to operate inside it. No less than six permeable steel casing windows 403 are arranged in the middle of the permeable steel casing 4, which are used for the high-pressure jet soil drilling rod 503 to obtain soil from the bottom of the uplift of the basement floor 1 through the permeable steel casing windows 403 to form mud 405. The preferred diameter of the plum blossom-shaped water-permeable holes 401 at the lower part of the permeable steel casing 4 is 1.0mm-3.0mm, and the spacing is 10mm-20mm.

[0028] Furthermore, a diesel generator 506 is provided on the top of the turntable 502, and the diesel generator 506 is connected to the high-pressure jet soil drilling rod 503 through a transmission device 507. The transmission device 507 includes a drill rod claw 508 and a guide rail 509. The drill rod claw 508 is arranged on the outside of the high-pressure jet soil drilling rod 503, and the high-pressure jet soil drilling rod 503 is slidably connected to the guide rail 509.

[0029] The transmission device 507 of the diesel generator 506 drives the high-pressure jet soil drilling rod 503 to rotate and drill. During drilling, the drill rod claws 508 lock the high-pressure jet soil drilling rod 503 and transmit pressure to the high-pressure jet soil drilling rod 503. The high-pressure jet soil drilling rod 503 drills along the guide rail 509. When stopping, the drill rod claws 508 are released, the high-pressure jet soil drilling rod 503 is taken out, the base 501 is leveled and fixed, and the turntable 502 can rotate 360° horizontally.

[0030] Furthermore, a spiral blade drill bit 505 is installed at the head of the high-pressure jet soil drilling rod 503. The top of the spiral blade drill bit 505 is a cone and is provided with a nozzle 504. There are no less than three spiral blades on the spiral blade drill bit 505. Nozzles 504 are also provided around the high-pressure jet soil drilling rod 503.

[0031] During drilling, the high-pressure jet soil drilling rod 503 rotates and sprays high-pressure water, cutting the soil into mud 405, which is discharged into the permeable steel casing 4 and pumped away by the mud pump. Specifically, the fan-shaped angle of the high-pressure jet soil drilling rod 503 rotating in a permeable steel casing window 403 is 65°-75°, and the adjacent window fan-shaped areas overlap by 5°-10°. The high-pressure jet soil drilling rod 503 rotates around the permeable steel casing 4 once, and the area of ​​the raised soil under the basement floor 1 treated is a circular area with the high-pressure jet soil drilling rod 503 as the radius.

[0032] Furthermore, two grooved steel plates of the clamp 702 are placed on both sides of the basement column 202 and are tightened by fastening bolts. A steel bracket 703 is installed above the clamp 702, and a jack 701 is installed at the bottom of the reaction frame 7.

[0033] The number of jacks 701 is determined according to the area of ​​the basement floor 1 formed by the basement columns 202 connected by four adjacent engineering piles 2 and the cap 201. The controlled area of ​​one jack 701 is not less than one square meter.

[0034] Furthermore, an inner tube 6 is arranged inside the permeable steel casing 4, and graded gravel 605 is arranged between the permeable steel casing 4 and the inner tube 6. The permeable steel casing 4, the inner tube 6 and the graded gravel 605 form a precipitation well composite structure, and a water pump 602, a drainage pipe 603, an automatic water level meter 607 and a steel well cover 604 are installed inside the inner tube 6 to form a drainage automatic control system.

[0035] The inner tube 6 is provided with an inner tube water-permeable hole 601, and the inner tube 6 is arranged in the permeable steel casing wall 404. The diameter of the inner tube 6 is not less than 1 / 5 of the permeable steel casing 4. The inner tube 6 is a bottom closed structure, and a steel plate covered with holes is welded. A circle of water-stopping steel plate 606 is welded on the outer wall of the inner tube 6. The area below the water-stopping steel plate 606 is processed into a flower tube and wrapped with two layers of filter screens.

[0036] Furthermore, the sensor of the automatic water level gauge 607 in the drainage automatic control system is buried below the waterproof layer 107 on the bottom surface of the basement floor 1, and the automatic water level gauge 607 is electrically connected to the water pump 602. When the sensor of the automatic water level gauge 607 is immersed in water, the circuit is turned on, and the water pump 602 is started to drain water. When the sensor of the automatic water level gauge 607 is higher than the groundwater level, the circuit is disconnected, and the water pump 602 is automatically controlled.

[0037] Furthermore, the present invention provides a method for repairing an anti-floating structure with raised bottom plate, comprising the following steps: S1, determine the location of the hole in the basement floor 1, break the floor concrete 101, install the permeable steel casing 4, take soil and sink the permeable steel casing 4; S2, install the drilling rig 5 in the permeable steel casing 4, and use the high-pressure jet soil extraction drill rod 503 to align with the permeable steel casing window 403 and rotate horizontally to drill and spray high-pressure water, so that the soil is made into mud 405 and discharged to form a hollow area; S3, installing the reaction frame 7, and using the jack 701 to pressurize the hollowed-out area of ​​the raised basement floor 1, so that the basement floor 1 returns to its original position; S4, a chisel groove 302 is opened along the bottom plate crack 301 at the water gushing point 3, and an oblique drill hole 303 is opened on the side of the chisel groove 302 to penetrate the deep part of the bottom plate crack 301, and then structural glue is poured into the oblique drill hole 303 to seal it, and a water stop strip 304 is placed in the chisel groove 302, and then it is sealed with waterproof mortar 305; S5. Use the window sealing plate 408 to seal the permeable steel casing window 403, weld the external threaded pipe 801 through the reserved grouting hole 409, insert the grouting pipe 8, and pour cement slurry into the remaining hollowed area after the basement floor 1 is reset, replacing the mud 405 to form a new foundation bearing layer; S6, transforming the permeable steel casing 4 used for soil extraction into a precipitation well composite structure, and installing a drainage automatic control system in the precipitation well composite structure; S7. Repair the basement floor 1 that was damaged in 4 places of the permeable steel casing.

[0038] Specifically, in step S4, a groove 302 is opened along the bottom plate crack 301, the groove length is not shorter than the crack length, the groove depth is 0.1m-0.3m, and an oblique drill hole 303 is opened at a distance of 0.2m-0.5m from the side of the crack. The number of drill holes is determined according to the length of the crack. Structural adhesive is poured into the crack, a water stop strip 304 is placed on the bottom surface of the groove 302, and then waterproof mortar 305 is poured to seal it.

[0039] Specifically, in step S5, after the raised soil under the basement floor 1 is made into mud 405 and drained away, all the loose soil is taken away to form a hollow area, and then the window sealing plate 408 is used to seal the permeable steel casing window 403, and the window sealing plate 408 is fixed to the steel plate 402 through the screw hole 406 by using the screw 407, and the grouting hole 409 is reserved on the window sealing plate 408. The grouting hole 409 is welded with an external threaded pipe 801, and the grouting pipe 8 is inserted into the hollow area of ​​the basement floor 1, and cement slurry is poured from the inside to the outside to form a grouting layer 102 to replace the mud 405, and finally the nut cover 802 is used to tighten the external threaded pipe 801 to block the grouting hole 409.

[0040] Specifically, in step S7, when repairing the damaged basement floor 1, the longitudinal reinforcement 103 and the transverse reinforcement 104 of the basement floor 1 are connected to the inner tube 6 through the welding point 105, and welded to the steel bars on the original basement floor 1, an interface agent is applied to the old concrete interface, and a waterproof layer 107 is laid on the cushion layer, and sealing concrete 106 is poured and cured to complete the repair of the basement floor 1.

[0041] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0042] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A device for repairing an anti-floating structure with a raised bottom plate, comprising a permeable steel casing (4), a drilling rig (5) and a reaction frame (7), characterized in that: The permeable steel casing (4) is provided with a permeable steel casing window (403) and a permeable hole (401). The bottom of the drilling rig (5) is provided with a base (501). The drilling rig (5) can be installed inside the permeable steel casing (4) through the base (501). A turntable (502) is provided on the base (501). The base (501) and the turntable (502) are connected via a bearing. A high-pressure jet soil drilling rod (503) is provided on the drilling rig (5). The reaction frame (7) is fixed to the surrounding basement columns (202) by means of a clamp (702). A jack (701) is provided on the reaction frame (7). The jack (701) applies pressure to the hollowed-out area of ​​the basement floor (1) so that the basement floor (1) can be restored to its original position.

2. The device for repairing an anti-floating structure with raised bottom plate according to claim 1, characterized in that: The upper portion of the water-permeable steel casing (4) is water-impermeable, the water-permeable steel casing window (403) is provided at the middle position of the water-permeable steel casing (4), the water-permeable holes (401) are provided at the lower position of the water-permeable steel casing (4), and the water-permeable holes (401) are arranged in a plum blossom shape, and the bottom end of the water-permeable steel casing (4) is an open structure.

3. The device for repairing an anti-floating structure with raised bottom plate according to claim 1, characterized in that: A diesel generator (506) is arranged on the top of the turntable (502); the diesel generator (506) is connected to the high-pressure jet soil drilling rod (503) via a transmission device (507); the transmission device (507) comprises a drill rod clamp (508) and a guide rail (509); the drill rod clamp (508) is arranged on the outside of the high-pressure jet soil drilling rod (503); and the high-pressure jet soil drilling rod (503) is slidably connected to the guide rail (509).

4. The device for repairing an anti-floating structure with raised bottom plate according to claim 1, characterized in that: A spiral blade drill bit (505) is installed at the head of the high-pressure jet soil drilling rod (503); the top of the spiral blade drill bit (505) is a cone and is provided with a nozzle (504); nozzles (504) are also provided around the high-pressure jet soil drilling rod (503).

5. The device for repairing an anti-floating structure with raised bottom plate according to claim 1, characterized in that: A steel bracket (703) is installed above the clamp (702), and the jack (701) is installed at the bottom of the reaction frame (7).

6. The device for repairing an anti-floating structure with raised bottom plate according to claim 1, characterized in that: An inner tube (6) is arranged inside the permeable steel casing (4), and graded crushed stone (605) is arranged between the permeable steel casing (4) and the inner tube (6). The permeable steel casing (4), the inner tube (6) and the graded crushed stone (605) form a precipitation well composite structure, and a water pump (602), a drainage pipe (603), an automatic water level gauge (607) and a steel well cover (604) are installed inside the inner tube (6), forming a drainage automatic control system.

7. The device for repairing an anti-floating structure with raised bottom plate according to claim 6, characterized in that: The sensor of the automatic water level meter (607) in the drainage automatic control system is buried below the waterproof layer (107) on the bottom surface of the basement floor (1), and the automatic water level meter (607) is electrically connected to the water pump (602).

8. A method for repairing an anti-floating structure with raised bottom plate, using any one of the anti-floating structure repairing devices with raised bottom plate according to claims 1 to 7, characterized in that: The steps include: S1, determine the location of the hole for the basement floor (1), break the floor concrete (101), install the permeable steel casing (4), take soil and sink the permeable steel casing (4); S2, installing a drilling rig (5) in the permeable steel casing (4), aiming a high-pressure jet soil extraction drill rod (503) at the window (403) of the permeable steel casing, drilling horizontally and spraying high-pressure water, and turning the soil into mud (405) and discharging it to form a hollowing area; S3, installing the reaction frame (7), and using the jack (701) to apply pressure to the hollowed-out area of ​​the raised basement floor (1), so that the basement floor (1) returns to its original position; S4, a chisel groove (302) is opened along the bottom plate crack (301), and an oblique drill hole (303) is opened on the side of the chisel groove (302) to penetrate the deep part of the bottom plate crack (301), and then a structural adhesive is poured into the oblique drill hole (303) to seal it, and a water stop strip (304) is placed in the chisel groove (302), and then it is sealed with waterproof mortar (305); S5. Use a window sealing plate (408) to seal the permeable steel casing window (403), weld an external threaded pipe (801) through the reserved grouting hole (409), insert a grouting pipe (8), and pour cement slurry into the remaining hollowed-out area after the basement floor (1) is reset, replacing the slurry (405) to form a new foundation bearing layer; S6, transforming the permeable steel casing (4) used for soil extraction into a drainage well composite structure, and installing a drainage automatic control system in the drainage well composite structure; S7. Repair the damaged basement floor (1) at the permeable steel casing (4).

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