Basement bottom plate tower crane foundation hole water gushing plugging structure

Abstract

The utility model relates to the technical field of building construction, in particular to a basement bottom plate tower crane foundation hole gushing water blocking structure which comprises a blind pipe assembly 1, a water stop steel sleeve assembly 2 and a water pumping pipe 3. A broken stone hardcore 802 is laid on the top of the tower crane foundation 801 and plays a role in gap drainage. A blind pipe assembly 1 is buried in the broken stone hardcore 802, an opening in the top of the blind pipe assembly 1 faces upwards, and the blind pipe assembly 1 is wrapped with geotechnical cloth 803, so that soil particles of a basement bottom plate are prevented from being taken away by later water pumping; and geotechnical cloth 803 is laid on the broken stone hardcore 802 and plays a role in isolation. And through multi-layer waterproof measures and grouting hardening treatment, the water burst problem of the basement bottom plate tower crane foundation hole is effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a water gushing blocking structure for a basement floor tower crane foundation opening. Background Art

[0002] When there is high-pressure groundwater under the basement floor, water gushing out before the basement floor crane foundation hole is closed, the basement floor crane foundation hole is not equipped with advanced water stop or waterproofing fails, and the basement floor hole is closed by underwater pouring concrete on site, the grouting plugging effect is not ideal, and water gushing still occurs;

[0003] The reason is that the water pressure is relatively high, the un-finally set concrete is diluted by water, and even penetrates the sand holes, resulting in countless sand holes leaking water. The sand holes are irregular, and grouting is injected to stop the leakage, but other sand holes leak water again, and the strength of the bottom plate of the opening does not meet the design requirements. This is a technical problem that people in this field urgently need to solve. Summary of the invention

[0004] Technical problem to be solved: In order to overcome the above shortcomings, a water seepage blocking structure for the opening of the tower crane foundation in the basement floor is provided.

[0005] The technical solution is: a water inrush plugging structure for the basement floor tower crane foundation hole, including a blind pipe assembly, a water-stop steel casing assembly and a pumping pipe; a crushed stone cushion layer is laid on the top of the tower crane foundation to play a role in gap drainage; a blind pipe assembly is buried in the crushed stone cushion layer, the opening at the top of the blind pipe assembly faces upward and is wrapped with geotextile to prevent the later pumping away soil particles of the basement floor; a geotextile is laid on the crushed stone cushion layer to play an isolation role;

[0006] The blind pipe assembly is connected with a water-stop steel casing assembly; the water-stop steel casing assembly comprises two sections of hot-dip galvanized steel pipes and a water-stop steel ring coaxially welded, and a water-stop steel ring is formed inside and outside the galvanized steel pipe; the lower section of the galvanized steel pipe is cut into a comb-shaped water-repellent portion, and the upper end of the upper section of the galvanized steel pipe is opened with a threaded opening, and the first gate valve is connected through the threaded opening; the galvanized steel pipe is detachably connected with a pumping pipe;

[0007] A waterproof board layer is cast on the top of the geotextile; a hole waterproofing membrane is laid on the top of the waterproof board layer; and a hole waterproofing membrane protective layer is cast on the top of the hole waterproofing membrane.

[0008] Preferably, the blind pipe assembly includes a plastic blind pipe, a straight tee and a right-angle elbow. Plastic blind pipes are buried around the tower crane opening. The intersection points of the plastic blind pipes on each side are connected with right-angle elbows. A straight tee is connected to the middle of the side length of the plastic blind pipe, with a single port facing upward. The top opening of the straight tee is wrapped with geotextile to prevent soil particles from the basement floor from being carried away by water in the later stage.

[0009] Preferably, the invention further comprises: a basement floor cushion layer is cast on the outward expansion foundation around the tower crane foundation opening; a leveling layer is cast on the top of the basement floor cushion layer; a tower crane foundation waterproofing membrane is laid around the top of the tower crane foundation opening and at right angles to the inner wall; a basement floor waterproofing membrane is laid on the top of the leveling layer, and a section of the basement floor reserved waterproofing membrane is extended; the basement floor reserved waterproofing membrane is firmly overlapped with the opening waterproofing membrane; a basement floor membrane protective layer is cast on the top of the basement floor waterproofing membrane; a basement floor is cast on the top of the basement floor membrane protective layer;

[0010] Preferably, the method further includes burying a water-stop steel plate in the middle during the pouring of the basement floor, arranging it in a closed manner along the perimeter of the basement floor, and welding and fixing it; laying expansion strips along the perimeter of the corners around the top of the basement floor roll material protective layer; roughening the side of the basement floor close to the tower crane opening to form a roughened portion;

[0011] Preferably, it also includes a gate valve opening template, which is connected to the lower part of the first gate valve as a guardrail; a post-cast closed bottom plate for the opening is cast on the top of the opening waterproof membrane protective layer;

[0012] Preferably, the top opening of the first gate valve is connected to a second gate valve; the top opening of the second gate valve is connected to a grouting pipe assembly; and the gravel cushion layer is grout-hardened by the grouting pipe assembly;

[0013] Preferably, the grouting pipe assembly comprises a galvanized steel pipe, the upper part of the galvanized steel pipe is connected to a grouting pipe, and a grouting ball valve is arranged in the middle of the grouting pipe;

[0014] Preferably, after the gravel cushion layer is grouting and hardened, the gate valve opening template and the grouting pipe assembly are removed, and the opening after the gate valve opening template is removed is roughened and cleaned, and then poured with concrete to seal it; a plastic drain board is laid on the top of the post-cast closed bottom plate of the opening, the plastic drain board is connected to the basement drainage ditch, and building ground concrete is poured on the top of the plastic drain board.

[0015] Beneficial effects: 1. Lay a gravel cushion layer to bury the blind pipe, and use corrosion-resistant geotextile to wrap the blind pipe opening, and pump water through the blind pipe assembly, water-stop steel casing assembly and pumping pipe to ensure the pouring of concrete and subsequent normal curing.

[0016] 2. Lay multiple layers of waterproof membrane and firmly overlap the opening waterproof membrane with the reserved basement floor waterproof membrane to ensure that the waterproof effect is long-lasting and durable.

[0017] 3. Through the blind pipe assembly, water-stop steel casing assembly and grouting pipe assembly, grouting hardening treatment is carried out to effectively block the water gushing problem at the opening of the tower crane foundation on the basement floor. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of a top plan structure of a water seepage blocking structure of a basement floor tower crane foundation opening.

[0019] Figure 2 The utility model is a schematic diagram of the cross-sectional structure of a blind pipe component in a water inrush plugging structure of a basement floor tower crane foundation opening.

[0020] Figure 3 The utility model is a schematic diagram of the cross-sectional structure of a water-stop steel casing assembly in a water-gushing plugging structure for a basement floor tower crane foundation opening and the pouring of a tower crane foundation.

[0021] Figure 4 The utility model is a schematic diagram of the planar structure of a water-stop steel casing assembly and a water pumping pipe in a water-gushing plugging structure for a basement floor tower crane foundation opening.

[0022] Figure 5 It is an enlarged cross-sectional structure diagram of the laying and overlapping of the waterproof membrane at the tower crane opening in the water seepage blocking structure of the tower crane foundation opening of the basement floor slab of the utility model.

[0023] Figure 6 The utility model is a schematic diagram of the cross-sectional structure of a gate valve opening template installed in a water inrush blocking structure of a tower crane foundation opening on a basement floor.

[0024] Figure 7 The utility model is a schematic cross-sectional structure diagram of a second gate valve and a grouting pipe assembly installed in a water inrush blocking structure of a tower crane foundation opening in a basement floor.

[0025] Figure 8 The utility model is a schematic cross-sectional structure diagram of removing a grouting pipe assembly and closing a gate valve opening in a water inrush blocking structure for a tower crane foundation opening on a basement floor.

[0026] The markings in the attached drawings are: 1-blind pipe assembly, 101-plastic blind pipe, 102-positive tee, 103-right angle elbow; 2-waterstop steel casing assembly, 201-first gate valve, 202-upper section galvanized steel pipe, 203-waterstop steel ring, 204-lower section galvanized steel pipe, 205-drainage part, 3-pumping pipe; 4-second gate valve, 5-gate valve opening template, 6-grouting pipe assembly, 601-galvanized steel pipe, 602-grouting pipe, 603-grouting ball valve; 701-basement floor, 702 basement floor roll material protective layer, 703-ground Waterproofing membrane for basement floor, 704-tower crane foundation waterproofing membrane, 705-leveling layer, 706-basement floor cushion, 707-foundation, 708-basement floor reserved waterproofing membrane; 801-tower crane foundation, 802-gravel cushion, 803-geotextile, 804-waterproof board layer, 805-hole waterproofing membrane, 806-hole waterproofing membrane protective layer, 807-hole post-cast closed bottom plate, 808-plastic drainage board, 809-concrete on the building floor; 901-roughened part, 902-expansion rubber strip, 903-waterstop steel plate. DETAILED DESCRIPTION

[0027] The present invention is described in detail below with reference to the accompanying drawings and specific embodiments, but is not intended to limit the present invention.

[0028] like Figure 1-8 As shown, a water inrush plugging structure of a basement floor tower crane foundation 801 hole includes a blind pipe assembly 1, a water-stop steel casing assembly 2 and a pumping pipe 3; a crushed stone cushion layer 802 is laid on the top of the tower crane foundation 801 to play a role in gap drainage; and a blind pipe assembly 1 is buried in the crushed stone cushion layer 802, the opening at the top of the blind pipe assembly 1 faces upward and is wrapped with a geotextile 803 to prevent the later pumping away of soil particles from the basement floor; a geotextile 803 is laid on the crushed stone cushion layer 802 to play an isolation role;

[0029] The blind pipe assembly 1 is connected with a water-stop steel casing assembly 2; the water-stop steel casing assembly 2 comprises two sections of hot-dip galvanized steel pipes and a water-stop steel ring 203 coaxially welded, and the water-stop steel ring 203 is formed inside and outside the galvanized steel pipe; the lower section of the galvanized steel pipe 204 is cut into a comb-shaped hydrophobic portion 205, and the upper section of the galvanized steel pipe 202 is opened with a threaded opening at the upper end, and the first gate valve 201 is connected through the threaded opening; the galvanized steel pipe is detachably connected with a pumping pipe 3;

[0030] A waterproof board layer 804 is cast on the top of the geotextile 803; a hole waterproofing membrane is laid on the top of the waterproof board layer 804; a hole waterproofing membrane protection layer 806 is cast on the top of the hole waterproofing membrane;

[0031] In the specific implementation process, the blind pipe assembly 1 includes a plastic blind pipe 101, a straight tee 102 and a right-angle elbow 103. Plastic blind pipes 101 are buried around the tower crane opening. The intersection points of the plastic blind pipes 101 on each side are connected by a right-angle elbow 103. A straight tee 102 is connected to the middle of the side length of the plastic blind pipe 101, with a single port facing upward. The top opening of the straight tee 102 is wrapped with a geotextile 803 to prevent the basement floor soil particles from being taken away by water pumping in the later stage.

[0032] In the specific implementation process, it also includes pouring a basement floor cushion layer 706 on the outward expansion foundation 707 around the tower crane foundation 801 opening; pouring a leveling layer 705 on the top of the basement floor cushion layer 706; laying a tower crane foundation waterproofing membrane 704 around the top of the tower crane foundation opening and at the right angles of the inner wall; laying a basement floor waterproofing membrane 703 on the top of the leveling layer 705, and extending a section of the basement floor reserved waterproofing membrane 708; the basement floor reserved waterproofing membrane 708 and the opening waterproofing membrane 805 are firmly overlapped; the basement floor waterproofing membrane 703 is poured on the top of the basement floor waterproofing membrane 702; the basement floor 701 is poured on the top of the basement floor waterproofing membrane 702;

[0033] In the specific implementation process, it also includes burying a water-stop steel plate 903 in the middle during the pouring of the basement floor, arranging it along the perimeter of the basement floor, and welding and fixing it; laying expansion strips 902 along the perimeter of the wall corners around the top of the basement floor roll material protection layer 702; roughening the side of the basement floor near the tower crane opening to form a roughening part 901;

[0034] In the specific implementation process, it also includes a gate valve opening template 5, which is connected to the lower part of the first gate valve 201 as a guardrail; a post-cast closed bottom plate 807 is cast on the top of the opening waterproof membrane protection layer 806;

[0035] In the specific implementation process, the top opening of the first gate valve 201 is connected to the second gate valve 4; the top opening of the second gate valve 4 is connected to the grouting pipe 602 assembly; the gravel cushion layer 802 is grouting hardened through the grouting pipe 602 assembly;

[0036] In the specific implementation process, the grouting pipe assembly 6 includes a galvanized steel pipe 601, the upper part of the galvanized steel pipe 601 is connected to a grouting pipe 602, and a grouting ball valve 603 is arranged in the middle of the grouting pipe 602;

[0037] In the specific implementation process, after the gravel cushion layer 802 is grouting and hardened, it also includes removing the gate valve opening template 5 and the grouting pipe 602 assembly, and the hole after the gate valve opening template 5 is removed is roughened and cleaned, and then poured with concrete to seal it; a plastic drain board 808 is laid on the top of the post-cast closed bottom plate 807 of the hole, and the plastic drain board 808 is connected to the basement drainage ditch, and the building ground concrete 809 is poured on the top of the plastic drain board 808.

[0038] The utility model also provides a construction system for the above-mentioned basement floor tower crane foundation hole water inrush blocking structure, and its construction process is as follows:

[0039] The tower crane foundation 801 should be a sunken tower crane foundation 801, which means that the top elevation of the tower crane foundation 801 should be at least 300mm lower than the bottom elevation of the basement floor, h2>300mm. If h2 is less than 300mm, the top of the tower crane foundation 801 should be chiseled off.

[0040] If the water source is found to be below the tower crane foundation waterproofing membrane 704 through on-site investigation, it indicates that the tower crane foundation waterproofing membrane 704 has failed. The tower crane foundation waterproofing membrane 704 should be cut and the roll strip with a width of more than 200 mm should be retained as the overlap width of the waterproofing membrane for closing the opening.

[0041] If the source of the gushing water is below the basement floor waterproofing membrane 703, it indicates that the waterproofing membrane at other locations of the basement floor has failed. The opening of the tower crane foundation on the basement floor should be expanded by 200mm, the concrete cushion layer and brick membrane under the floor should be chiseled off, and the waterproofing membrane in this width should be removed to form a water flow channel with a cross-section of 200mm*300mm, and the gushing water will flow to the opening of the tower crane foundation 801.

[0042] The height difference between the top of the basement floor and the top of the tower crane foundation 801 should be H>500H=h1+h2, in order to leave enough water storage space, which should be determined according to the water gushing rate.

[0043] like Figure 1-2 As shown, a HDPE blind pipe D100 is buried on the top of the tower crane foundation 801. The blind pipe is arranged along the periphery of the tower crane opening. The blind pipe is 500 mm away from the edge of the opening. The blind pipe is connected by a PVC-U DN100 straight tee 102 and a 90-degree elbow joint; the single port of the PVC-U DN100 straight tee 102 faces vertically upward.

[0044] A crushed stone cushion layer with a specification of 15-40 mm is laid on the top of the tower crane foundation 801, and the thickness of the crushed stone cushion layer 802 is higher than the top of the single-port PVC-U straight tee 102.

[0045] The blind pipe is wrapped with corrosion-resistant geotextile 803 to prevent the soil under the basement floor from being lost during the pumping process, which would affect the structural safety.

[0046] like Figure 4As shown, the waterstop sleeve is inserted into the single port of the regular tee 102. The waterstop sleeve is composed of two sections of DN50*3mm hot-dip galvanized steel pipes and a waterstop steel plate 903 ring coaxially welded. The waterstop steel plate 903 ring is located between the two sections of steel pipes and is perpendicular to each other. The specification of the waterstop steel plate 903 ring is 30mm inner diameter * 156mm outer diameter. The waterstop steel plate 903 ring is formed inside the galvanized steel pipe and outside the galvanized steel pipe. The lower section of the steel pipe is cut into a comb shape, and a threaded opening is left at the upper end of the upper section of the steel pipe, which is connected to a DN50 stainless steel gate valve.

[0047] The gap between the galvanized steel pipe and the PVC-U straight tee 102 is filled with geotextile 803.

[0048] Connect the PVC water pumping pipe 3DN25 to the galvanized steel pipe and the water stop steel ring 203 through the first gate valve 201, and insert it to the bottom of the positive tee 102; the bottom of the PVC water pumping pipe 3 is cut into a comb-shaped hydrophobic part 205.

[0049] The PVC water suction pipe 3 is connected to a vacuum water suction pump. The vacuum water pump is set to be automatically or manually supervised. Pumping water lowers the water level at the top of the tower crane foundation 801 to 50 mm below the top of the gravel cushion layer 802.

[0050] 2 sets of water-stop sleeves, 2 sets of PVC straight tees 102, and a vacuum water suction pump, one for use and one for backup, are combined into a group; the number of water-stop sleeves, PVC straight tees 102 and vacuum water suction pumps is determined based on the water gushing volume of the basement tower crane foundation 801; ensure that the groundwater level is balanced to 50mm below the top of the gravel cushion layer 802.

[0051] A layer of geotextile 803 is laid on the gravel cushion layer 802 to prevent the concrete slurry during the pouring of the watertight slab concrete from flowing into the gravel cushion layer 802 below and blocking the gaps in the gravel cushion layer 802.

[0052] Pour C20 fine stone concrete waterproof board layer 804 on the geotextile 803, preferably with a thickness of >50mm; and maintain for 1 day.

[0053] Roughen the cross-section of the tower crane opening reserved on the basement floor, clean the embedded water-stop steel plate 903, and clean the surface of the waterproof plate.

[0054] like Figure 5 As shown, the opening waterproofing membrane 805 is laid on the baffle plate and overlapped with the reserved waterproofing membrane 708 of the basement floor, which is the same as the waterproofing method of the basement floor in the engineering design drawings.

[0055] After the waterproofing membrane is reported to the supervision engineer for acceptance, the protective layer of waterproofing membrane 806 at the opening is poured according to the design drawings and maintained for 1 day;

[0056] like Figure 6As shown, at the bottom of the tower crane opening section reserved in the basement floor, a water-expandable rubber strip 902 is laid along the perimeter and fixed;

[0057] Install the tower crane opening reinforcement according to the design drawings and specifications, fix the waterstop steel casing, and report to the supervising engineer for acceptance.

[0058] After the steel bars of the tower crane opening are accepted, the post-poured concrete of the tower crane opening of the basement floor is sealed according to the design and specification requirements, using shrinkage compensating concrete one grade higher than the designed basement floor concrete grade; before pouring concrete, a guardrail structure with a reserved gate valve opening template 5 is used to protect the first gate valve 201 to prevent concrete from contaminating the gate valve.

[0059] After the post-cast concrete at the tower crane opening has been cured for 7 days or has reached 75% of the design strength, the PVC suction pipe 3 and the suction pump shall be removed.

[0060] like Figure 7 As shown, the first gate valve 201 is connected to the grouting pipe 602 assembly through the second gate valve 4, and the grouting pipe 602 assembly consists of a DN50 galvanized steel pipe + a plug + a DN25 galvanized steel pipe + a threaded DN25 ball valve + a DN25 galvanized steel pipe grouting joint;

[0061] Open the stainless steel grouting ball valve 603, grout the gravel cushion layer 802 on site for hardening treatment, use 42.5 cement + HQS-Super100 Huaqiansu to configure non-diffusion grouting liquid in water, until thick cement slurry emerges from the opposite water-stop steel casing gate valve, close the opposite gate valve, and continue grouting to fill the gaps under the basement floor and the gravel gaps. When the grouting pressure gauge stabilizes to 3.0MPa for 10 minutes, close the stainless steel gate valve, close the grouting ball valve 603, stop grouting, and perform additional grouting after 30 minutes. After 3.0MPa is stabilized for 10 minutes, close the stainless steel gate valve, close the grouting ball valve 603, stop grouting, remove the grouting pipe assembly 6, and clean the stainless steel second gate valve 4 and grouting pipe 602, etc.

[0062] 50 hours after grouting or after the slurry is finally set, open the second gate valve 4, check whether the cement slurry in the water stop sleeve is full, and observe whether there is water leakage in the water stop sleeve; if there is water coming out of the water stop sleeve, clean the gate valve, connect the grouting pipe 602 again, and perform supplementary grouting. The supplementary grouting uses 42.5 cement + HQS-Super100 Huaqiansu to configure non-diffusion grouting liquid in water for steady pressure grouting as above;

[0063] like Figure 8As shown, the grouting pipe assembly 6 is removed, and the hole after the gate valve hole template 5 is removed is cleaned and roughened; and concrete is poured and sealed, and the shrinkage compensation concrete with the same label as the hole is poured later. The second gate valve 4 and the first gate valve 201 are both in a closed state, and polyurea is filled between the second gate valve 4 and the first gate valve 201, and polyurethane foam is filled on the outside of the second gate valve 4. If there is water leakage in the later stage, the polyurethane foam can be removed and grouting is performed again; the two gate valves are permanently buried in the concrete to form a permanent water stop; the relative column grid coordinates should be collected before the gate valve hole is closed and poured, and marked in the completion drawing;

[0064] A plastic drainage board 808 is laid at the opening of the tower crane and connected to the basement drainage ditch. If there is a small amount of water leakage during the later operation, the water will be led to the basement drainage ditch; a layer of building ground concrete 809 is poured on the drainage board, compacted and smoothed, and maintenance is strengthened.

[0065] The above embodiments are provided for persons familiar with the art to implement or use the present invention. Personnel familiar with the art can make various modifications or changes to the above embodiments without departing from the inventive concept of the present invention. Therefore, the protection scope of the present invention is not limited to the above embodiments, but should be the maximum scope of the innovative features mentioned in the claims.

Claims

1. A water-blocking structure for the opening of a tower crane foundation in a basement floor, characterized in that: It comprises a blind pipe assembly (1), a water-stop steel casing assembly (2) and a pumping pipe (3); a crushed stone cushion layer (802) is laid on the top of the tower crane foundation (801) to play a role in gap drainage; a blind pipe assembly (1) is buried in the crushed stone cushion layer (802), the opening at the top of the blind pipe assembly (1) faces upward and is wrapped with a geotextile (803) to prevent the basement floor soil particles from being taken away by water pumping in the later stage; a geotextile (803) is laid on the crushed stone cushion layer (802) to play an isolation role; The blind pipe assembly (1) is connected to a water-stop steel sleeve assembly (2); the water-stop steel sleeve assembly (2) comprises two sections of hot-dip galvanized steel pipes and a water-stop steel ring (203) coaxially welded together, and the water-stop steel ring (203) is formed inside and outside the galvanized steel pipe; the lower section of the galvanized steel pipe (204) is cut into a comb-shaped water-repellent portion (205); the upper section of the galvanized steel pipe (202) is provided with a threaded opening at the upper end, and a first gate valve (201) is connected via the threaded opening; a water pumping pipe (3) is detachably connected inside the galvanized steel pipe; A waterproof board layer (804) is cast on the top of the geotextile (803); a hole waterproofing roll (805) is laid on the top of the waterproof board layer (804); and a hole waterproofing roll protective layer (806) is cast on the top of the hole waterproofing roll (805).

2. The water inrush blocking structure for the basement floor tower crane foundation opening according to claim 1 is characterized in that: The blind pipe assembly (1) comprises a plastic blind pipe (101), a straight tee (102) and a right-angle elbow (103). Plastic blind pipes (101) are buried around the tower crane opening. The intersections of the plastic blind pipes (101) on each side are connected by a right-angle elbow (103). A straight tee (102) is connected in the middle of the side length of the plastic blind pipe (101), with the single port facing upward. The top opening of the straight tee (102) is wrapped with a geotextile (803) to prevent soil particles from being carried away from the basement floor by pumping water later.

3. The water inrush blocking structure for the basement floor tower crane foundation opening according to claim 1 is characterized in that: The method further comprises: pouring a basement floor cushion layer (706) on the outwardly extended foundation (707) around the opening of the tower crane foundation (801); pouring a leveling layer (705) on the top of the basement floor cushion layer (706); laying a tower crane foundation waterproofing membrane (704) around the top of the opening of the tower crane foundation and at the right angles of the inner wall; laying a basement floor waterproofing membrane (703) on the top of the leveling layer (705), and extending a section of the basement floor reserved waterproofing membrane (708); the basement floor reserved waterproofing membrane (708) and the opening waterproofing membrane (805) are firmly overlapped; pouring a basement floor waterproofing membrane protective layer (702) on the top of the basement floor waterproofing membrane (703); and pouring a basement floor (701) on the top of the basement floor waterproofing membrane (702).

4. The water inrush blocking structure for the basement floor tower crane foundation opening according to claim 1 is characterized in that: During the pouring process of the basement floor, a water-stop steel plate (903) is buried in the middle, arranged along the perimeter of the basement floor, and welded and fixed; expansion strips (902) are laid along the perimeter of the four corners of the top of the basement floor roll material protection layer (702); the side of the basement floor close to the tower crane opening is roughened to form a roughened portion (901); It also includes a gate valve opening template (5), which is connected to the lower part of the first gate valve (201) as a guardrail; and a post-cast opening closed bottom plate (807) is cast on the top of the opening waterproof membrane protection layer (806).

5. The water inrush blocking structure for the basement floor tower crane foundation opening according to claim 4 is characterized in that: The invention also comprises that the top opening of the first gate valve (201) is connected to a second gate valve (4); the top opening of the second gate valve (4) is connected to a grouting pipe assembly (6); and the crushed stone cushion layer (802) is grouting-hardened through the grouting pipe assembly (6).

6. The water inrush blocking structure for the basement floor tower crane foundation opening according to claim 5 is characterized in that: The grouting pipe assembly (6) comprises a galvanized steel pipe (601), the upper part of the galvanized steel pipe (601) is connected to a grouting pipe (602), and a grouting ball valve (603) is arranged in the middle of the grouting pipe (602).

7. The water inrush blocking structure for the basement floor tower crane foundation opening according to claim 5 is characterized in that: After the crushed stone cushion layer (802) is grout-cast and hardened, the gate valve opening template (5) and the grouting pipe assembly (6) are removed, and the opening after the gate valve opening template (5) is roughened and cleaned, and then poured with concrete to seal it; a plastic drainage board (808) is laid on the top of the post-cast closed bottom plate (807) of the opening, and the plastic drainage board (808) is connected to the basement drainage ditch, and building ground concrete (809) is poured on the top of the plastic drainage board (808).

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