Construction method for water seepage treatment of building basement bottom plate

Abstract

The invention relates to the technical field of water seepage treatment, in particular to a construction method for water seepage treatment of a building basement bottom plate, which comprises the following steps: S1, organizing construction according to site construction conditions and procedure arrangement; s2, chiseling away an original decorative surface layer; s3, bottom plate concrete is chiseled away along the position of the existing grouting pipe, and the chiseling opening range is phi 300 * 30 mm; s4, low-pressure grouting is conducted through the existing grouting pipe; s5, water absorption treatment; s6, primary plugging treatment; s7, treating surrounding cracks; s8, redundant slurry pipes are cut off; s9, chiseling off opening sealing and secondary blocking are conducted; s10, pressing and smearing easy plaster; s11, construction of a laminated layer; and S12, building ground restoration. The device has the effect of treating the water seepage condition of the bottom plate.

Description

Technical Field

[0001] The present application relates to the technical field of water seepage treatment, and in particular to a construction method for water seepage treatment of a building basement floor. Background Art

[0002] When shield tunnels pass under existing buildings, grouting is performed to reinforce the soil beneath them for safety reasons, increasing their bearing capacity. However, after the shield tunnel passes through and is re-extended, the soil is disturbed, creating gaps between the soil and the basement floor. Groundwater can flow in through these gaps or seep onto the surface, causing waterlogging and dampness in the basement floor.

[0003] Existing methods often focus solely on surface treatment, which works well for smaller, shallower cracks. However, for wider, deeper, or extended cracks, these methods fail to fundamentally address leakage and fail to penetrate deep into the cracks for filling and reinforcement. Therefore, a new technical solution is needed to address these issues. Summary of the Invention

[0004] In order to deal with the situation of floor seepage, the present application provides a construction method for treating floor seepage in a building basement.

[0005] This application provides a construction method for treating water seepage in a building basement floor, which adopts the following technical solution: A construction method for treating water seepage in a building basement floor comprises the following steps: S1: Organize construction according to on-site construction conditions and process arrangements; S2: Chisel away the original decorative surface layer: Chisel away the original decorative surface layer around the existing grouting pipe where water is seeping, to the bottom plate structure surface layer, with the chiseling opening range being 1000mm*1000mm; S3: Chisel away the bottom slab concrete along the existing grouting pipe. The chiseled opening is a circle with a diameter of 300mm and a depth of 30mm (Φ300*30mm). S4: Low-pressure grouting of existing grouting pipes: select the grouting method according to the on-site water seepage situation, carry out grouting treatment, and grout to the hole mouth; S5: Water absorption treatment: Drill holes along the periphery of the existing grouting pipe to pre-embed water absorption grouting nozzles, and inject hydrophilic polyurethane into the water absorption grouting nozzles; S6: Primary plugging treatment: Drill holes along the periphery of the existing grouting pipe and pre-embed the primary plugging grouting nozzle, and inject acrylate into the primary plugging grouting nozzle; S7: Treatment of surrounding cracks: pre-buried crack grouting nozzles along the crack perimeter, and injected polyurea waterproof coating into the crack grouting nozzles; S8: Excessive grout pipe removal: remove the existing grout pipes, water suction grouting nozzles, primary plugging grouting nozzles, and crack grouting nozzles that protrude from the bottom plate; S9: Sealing of the cutout and secondary plugging: Use sealing materials to seal the cutout of the bottom plate and inject polyurea waterproof coating; S10: Pressing and applying the adhesive: pressing and applying the adhesive on the surface of the base plate; S11: Construction of superimposed layer: tie steel bars at the cutout of the original decorative surface layer and pour concrete; S12: Restoration of the building floor: After the construction of the superimposed layer (13) is completed, the floor is restored to the original decorative surface layer.

[0006] By adopting the above technical solution, first, low-pressure grouting is carried out into the existing grouting pipe until the slurry overflows from the pipe mouth in order to fill the gap between the basement floor and the soil, to deal with the depletion of the basement floor due to the disturbance of the lower soil, and at the same time cut off the path of groundwater upwelling; secondly, hydrophilic polyurethane is used to absorb the residual moisture in the reinforced concrete of the basement floor to keep it as dry as possible; since acrylates can quickly dissolve in water to form a gel, acrylates are used for the initial sealing to fill the cracks in the basement floor; polyurea waterproof coating is used in two places, one is to inject polyurea waterproof coating into the periphery of the existing grouting pipe to fill the gap between the existing grouting pipe and the surrounding floor concrete; the second is to use it in the surrounding small cracks. The surrounding small cracks only need to be surface sealed. Such construction is conducive to improving the stability of the floor seepage treatment.

[0007] Optionally, step S4 further includes the following steps: S4.1: Grouting shall be carried out using 42.5 early-strength ordinary Portland cement, a cement slurry with a water-cement ratio of 0.7-1.1 and a double-liquid slurry of a 1:1 cement-water glass mixture; S4.2: Critical pressure: The initial grouting pressure range is 0.1-0.2 MPa, the final grouting pressure range is 0.2-0.3 MPa, and the pressure is maintained for 10 minutes; S4.3: When grouting begins, lower the grouting pipe to the bottom of the hole, stir the cement slurry according to the water-cement ratio, start the grouting pump, and press the cement slurry to the bottom of the hole until the cement slurry returns from the hole mouth; S4.4: Sealing and flushing: After grouting is completed, seal the hole.

[0008] By adopting the above technical solution, using double slurry, and slowly injecting at low pressure until slurry emerges from the hole, it is beneficial to avoid damaging the basement floor. The low-pressure slow injection method is also beneficial to fully fill the gaps between the basement floor and the soil, and deal with the voids in the basement floor caused by disturbance of the lower soil, while cutting off the path for groundwater to rise.

[0009] Optionally, the water-absorbing grouting nozzle in step S5 is pre-buried to 3 / 4 of the bottom plate thickness, and is paused for 10-15 seconds after the first injection of hydrophilic polyurethane, and then the hydrophilic polyurethane is injected for the second time.

[0010] By adopting the above technical solution, the hydrophilic polyurethane has good hydrophilicity. By pre-embedding to 3 / 4 of the thickness of the base plate and stagnating for 10-15 seconds after the first injection, it is beneficial to ensure that the hydrophilic polyurethane fully absorbs the residual moisture in the reinforced concrete of the basement floor, so that it can be kept as dry as possible.

[0011] Optionally, the initial plugging grouting nozzle in step S6 is 10-15 cm away from the existing grouting pipe, and the initial plugging grouting nozzle is pre-buried at 45° to 1 / 2 of the bottom plate thickness.

[0012] By adopting the above technical solution, acrylate penetrates into the gaps of the hydrophilic polyurethane that has absorbed water and solidifies quickly to form a waterproof sealing colloid, thereby further preventing accumulated water from seeping out of the base plate and completing the sealing of the base plate for the first time.

[0013] Optionally, step S7 further includes the following steps: S7.1: Create a 50mm x 50mm V-shaped groove at the crack opening of the bottom plate; S7.2: Pre-embed the crack grouting nozzle at a 45-degree angle to the crack and pour polyurea waterproof coating into the crack grouting nozzle; S7.3: After grouting is completed, remove and smooth the portion of the crack grouting nozzle that protrudes from the base plate; S7.4: Use epoxy repair adhesive to cover the crack, and the covering range is within 100 mm around the crack grouting nozzle.

[0014] By adopting the above technical solution, the polyurea waterproof coating has the advantages of deep waterproofing and simple construction. The V-shaped groove makes it easy to observe the injection status of the polyurea waterproof coating. After the cracks around the existing grouting pipes are filled, it is beneficial to improve the overall water-proofness of the base plate.

[0015] Optionally, step S9 further includes the following steps: S9.1: Arrange perforated grouting pipes along the perimeter of existing grouting pipes; S9.2: After applying the plugging material and compacting it, evacuate the grouting pipe opening; S9.3: After the sealing material has hardened, inject polyurea waterproofing coating into the opening grouting pipe.

[0016] By adopting the above technical solution, the wall of the open-hole grouting pipe is provided with many regularly arranged small holes, which are conducive to allowing the grouting liquid to flow out evenly and enter the concrete medium that needs to be sealed; polyurea waterproof coating is injected into the open-hole grouting pipe to further fill the gaps in the basement floor and perform secondary sealing; and vacuuming the open-hole grouting pipe is conducive to eliminating air interference and facilitating the polyurea waterproof coating to fully fill the surrounding concrete cracks.

[0017] Optionally, step S11 further includes the following steps: S11.1: Added gluten, gluten is set in two directions; S11.2: Added 180° hook reinforcement; S11.3: Hook reinforcement shall be arranged in a plum blossom pattern with one end of the hook embedded in the base plate to a depth of 15d and the other end of the hook tied to the face reinforcement.

[0018] By adopting the above technical solution, the ribs are helpful to improve the strength of the bottom plate, and the hooked steel bars help to achieve the joint force of the superimposed layer and the original bottom plate, which can better maintain the integrity of the bottom plate under the action of load.

[0019] Optionally, at least two water suction grouting nozzles are provided, and the at least two water suction grouting nozzles are distributed in a circular array along the existing grouting pipe.

[0020] By adopting the above technical solution, the number of water absorption and grouting nozzles is selected according to the moisture content or wetness of the base plate, which is beneficial to reducing the moisture content inside the base plate and keeping the base plate dry.

[0021] Optionally, at least two primary plugging grouting nozzles are provided, and the at least two primary plugging grouting nozzles are distributed in a circular array along the existing grouting pipe.

[0022] By adopting the above technical solution, the number of initial plugging grouting nozzles is selected according to the cracking conditions of the bottom plate around the existing grouting pipes, which is conducive to improving the efficiency of solving the initial plugging of the bottom plate.

[0023] In summary, this application has the following beneficial technical effects: First, low-pressure grouting is carried out into the existing grouting pipe until the slurry overflows from the pipe mouth in order to fill the gap between the basement floor and the soil, to deal with the depletion of the basement floor due to the disturbance of the lower soil, and at the same time to cut off the path of groundwater upwelling; secondly, hydrophilic polyurethane is used to absorb the residual moisture in the reinforced concrete of the basement floor to keep it as dry as possible; since acrylates can quickly dissolve in water to form gels, acrylates are used for the initial sealing to fill the cracks in the basement floor; polyurea waterproof coating is used in two places, one is to inject polyurea waterproof coating on the periphery of the existing grouting pipe to fill the gap between the existing grouting pipe and the surrounding floor concrete; the second is to use it in the surrounding small cracks. The surrounding small cracks only need to be surface sealed. Such construction is conducive to improving the stability of the floor seepage treatment. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the construction steps of the building floor seepage treatment method of the present application; Figure 2 This is a schematic plan view of the building floor before water seepage treatment in this application; Figure 3 is a plan view of steps S2-S3 of the present application; Figure 4 is a plan view of steps S4-S7 of the present application; Figure 5 is a plan view of steps S8-S9 of the present application; Figure 6 is a plan view of step S10 of the present application; Figure 7 It is a plan view of steps S11-S12 of the present application.

[0025] Explanation of the accompanying symbols: 1. Decorative surface layer; 2. Existing grouting pipe; 3. Base plate; 4. Water-absorbing grouting nozzle; 5. Primary sealing grouting nozzle; 6. Crack grouting nozzle; 7. Glue; 8. Hooked steel bar; 9. Sealing material; 10. Glue; 11. Open-hole grouting pipe; 12. V-shaped groove; 13. Overlay layer. DETAILED DESCRIPTION

[0026] The following is combined with Figure 1-7 This application is described in further detail.

[0027] See also Figure 1-7 A construction method for treating water seepage in a building basement floor comprises the following steps: S1: Maintain the construction site and organize construction personnel according to the on-site construction conditions and process arrangements; S2: Chisel away the original decorative surface layer 1: There is an existing grouting pipe 2 on the building base slab 3, and the existing grouting pipe 2 is exposed above the original decorative surface layer 1. Chisel away the original decorative surface layer 1 around the existing grouting pipe 2 that is leaking water, and chisel away until the structural surface layer of the base slab 3 is exposed. The chiseled-away opening of the original decorative surface layer 1 should be 1000mm*1000mm. S3: Chisel away the surface layer of the bottom plate 3 along the periphery of the existing grouting pipe 2, and the chiseled opening of the bottom plate 3 is Φ300*30mm in a cone shape; S4: Low-pressure grouting of the existing grouting pipe 2: Select a suitable grouting method, perform grouting, and grout to the orifice; S5: Water absorption treatment: drilling holes along the periphery of the existing grouting pipe 2, and pre-buried the water absorption grouting nozzle 4, and then injecting hydrophilic polyurethane into the water absorption grouting nozzle 4; S6: Primary plugging treatment: drilling holes along the periphery of the existing grouting pipe 2, pre-buried the primary plugging grouting nozzle 5, and then injecting acrylate into the primary plugging grouting nozzle 5; S7: Crack treatment: pre-embed the crack grouting nozzle 6 along the crack periphery, and inject polyurea waterproof coating into the crack grouting nozzle 6; S8: Excessive grouting pipe removal: remove the existing grouting pipe 2, water absorption grouting nozzle 4, primary plugging grouting nozzle 5, and crack grouting nozzle 6 protruding from the bottom plate 3 to avoid affecting subsequent construction; S9: Sealing the chiseled opening and secondary plugging: Use sealing material 9 to seal the chiseled opening of the bottom plate 3 and inject polyurea waterproof coating; S10: Applying the beneficial glue 10: Applying the beneficial glue 10 on the surface of the bottom plate 3. The thickness of the beneficial glue 10 is 5.0 and is applied in two layers. S11: Construction of the superimposed layer 13: Tie steel bars to the chiseled opening of the original decorative surface layer 1 and pour concrete; S12: Restoration of the building floor: After the construction of the superimposed layer 13 is completed, the floor is restored to the original decorative surface layer 1.

[0028] When sealing water seepage cracks around the existing grouting pipe 2 in the building base slab 3, first locate the existing grouting pipe 2. Then, chisel away the original decorative surface layer 1, centered around the existing grouting pipe 2, within a 1000mm*1000mm area, until the base slab 3 structural surface layer is exposed. Next, chisel away the base slab 3 structural surface layer, again centered around the existing grouting pipe 2, in a conical area measuring 300*30mm in diameter. By observing the water inflow rate from the chiseled opening in the base slab 3, the appropriate grouting method is selected. In this embodiment, low-pressure grouting is employed.

[0029] First, low-pressure grouting is performed into the existing grouting pipe 2 until the slurry overflows from the pipe mouth. This is to fully fill the gap between the basement floor 3 and the soil, to deal with the degassing of the basement floor 3 due to the disturbance of the lower soil, and at the same time cut off the path of groundwater upwelling; secondly, hydrophilic polyurethane is used to absorb the residual moisture in the reinforced concrete of the basement floor 3 to keep it as dry as possible; since acrylate can quickly dissolve in water to form a gel, acrylate is then used to perform the initial sealing and filling of the cracks in the basement floor; polyurea waterproof coating is used in two places. One is to inject polyurea waterproof coating into the periphery of the existing grouting pipe to fill the gap between the existing grouting pipe 2 and the surrounding floor concrete; the second is to use it in the surrounding small cracks. The surrounding small cracks only need to be surface sealed to complete the water seepage treatment of the floor 3.

[0030] Specifically, to facilitate low-pressure grouting into the bottom plate 3, step S4 further includes the following steps: S4.1: Use 42.5 early-strength ordinary Portland cement for grouting, using a dual-liquid grout with a water-cement ratio of 0.7-1.1 and a 1:1 cement-water glass mixture. Use the dual-liquid grout, slowly injecting at low pressure until grout begins to bubble out of the orifice. This helps avoid damage to the basement slab 3 caused by high-pressure grouting. S4.2: Critical pressure: The initial grouting pressure range is 0.1-0.2 MPa, the final grouting pressure range is 0.2-0.3 MPa, and the pressure is maintained for 10 minutes; S4.3: When grouting begins, lower the grouting pipe to the bottom of the hole, stir the cement slurry according to the water-cement ratio, start the grouting pump, and press the cement slurry to the bottom of the hole until the cement slurry returns from the hole mouth; S4.4: Sealing and flushing: After grouting is completed, seal the hole.

[0031] The low-pressure slow injection method is also beneficial for fully filling the gaps between the basement floor 3 and the soil, dealing with the voids in the basement floor 3 caused by the disturbance of the lower soil, and cutting off the path for groundwater to rise.

[0032] For details, see Figure 4 In step S5, the bottom end of the water-absorbing grouting nozzle 4 is pre-buried at 3 / 4 of the thickness of the bottom plate 3, and is stagnant for 10-15 seconds after the first injection of hydrophilic polyurethane, and then the second injection of hydrophilic polyurethane is performed.

[0033] Hydrophilic polyurethane is a polyurethane material with excellent hydrophilicity. By pre-embedding the bottom end of the water-absorbing grouting nozzle 4 at 3 / 4 of the thickness of the basement slab 3, the hydrophilic polyurethane fully absorbs the residual moisture in the reinforced concrete of the basement slab 3, keeping it as dry as possible. By injecting the hydrophilic polyurethane a second time after stagnation, the hydrophilic polyurethane's ability to absorb seepage water is further improved.

[0034] For details, see Figure 4 The primary plugging grouting nozzle 5 in step S6 is arranged at a distance of 10-15 cm from the periphery of the existing grouting pipe 2, and the primary plugging grouting nozzle 5 is pre-buried at 45° to 1 / 2 of the thickness of the bottom plate 3.

[0035] Acrylate grouting reinforcement material performs well in underground engineering, can significantly improve the anti-seepage ability of underground engineering, effectively prevent the infiltration of water, and ensure the dryness and stability of underground structure. It has strong fluidity, can penetrate deep into fine cracks, and can also form gel in water, which is used for the initial plugging of water seepage points. In addition, acrylate grouting material can also enhance the stability of underground structure, disperse stress, reduce crack expansion and structural deformation. By pre-embedding the bottom of the initial plugging grouting nozzle 5 to 1 / 2 of the base plate 3, acrylate is made to flow in the internal gap of hydrophilic polyurethane and quickly solidify to form a waterproof sealing colloid, thereby further preventing water seepage from seeping out of the base plate 3.

[0036] For details, see Figure 4 , step S7 further includes the following steps: S7.1: Open a V-shaped groove 12 with a size of 50 mm * 50 mm at the crack of the bottom plate 3; S7.2: Pre-embed the crack grouting nozzle 6 at a 45° angle to the crack, and pour polyurea waterproof coating into the crack grouting nozzle 6; S7.3: After the grouting is completed, the portion of the crack grouting nozzle 6 protruding from the bottom plate 3 is removed and smoothed; S7.4: Use epoxy repair adhesive to cover the crack, and the covering range is 100mm around the crack grouting nozzle 6.

[0037] Because water seepage in the baseboard 3 is often accompanied by cracks, when cracks in the baseboard 3 need to be treated, a 50mm*50mm V-shaped groove 12 is first cut in the crack opening. A crack grouting nozzle 6 is then pre-embedded at a 45-degree angle into the crack. Polyurea waterproofing coating is then poured into the crack grouting nozzle 6. The filling status of the polyurea waterproofing coating is monitored through the V-shaped groove 12. Finally, epoxy repair adhesive is applied to the cover, ultimately improving the overall water-proofing properties of the baseboard 3.

[0038] For details, see Figure 5 , step S9 further includes the following steps: S9.1: Arrange the perforated grouting pipe 11 along the periphery of the existing grouting pipe 2; S9.2: After applying the plugging material 9 and compacting it, evacuate the opening grouting pipe 11. The plugging material is specifically a leak-proof king. S9.3: After the plugging material 9 hardens, inject polyurea waterproof coating into the open hole grouting pipe 11.

[0039] The perforated grouting pipe 11 has numerous regularly arranged small holes on its wall, allowing the grouting liquid to flow evenly into the concrete medium that needs to be sealed. Injecting polyurea into the perforated grouting pipe 11 further fills the gaps within the basement floor 3, completing a secondary seal. Vacuuming the perforated grouting pipe 11 helps eliminate air interference, allowing the polyurea waterproof coating to more densely fill the cracks. For details, see Figure 7 , step S11 further includes the following steps: S11.1: Added rib 7, which is single-layer and bidirectional, and the specification of rib 7 is Grade 3 steel bar 12@150; S11.2: Add 180° hook steel bar 8, and the specification of hook steel bar 8 is Grade 3 steel bar 8@400*400; S11.3: The hook steel bars 8 are arranged in a plum blossom shape, with one end of the hook steel bar 8 embedded in the bottom plate 3 to a depth of 15d, and the other end of the hook steel bar 8 is tied to the surface reinforcement 7.

[0040] The ribs 7 are beneficial to improving the strength of the bottom plate 3, and the hooked steel bars 8 help the laminated layer 13 and the original bottom plate 3 to bear the force together, so as to better maintain the integrity of the bottom plate under the action of load.

[0041] It is worth noting that see Figure 4 In order to reduce the moisture content inside the bottom plate 3 and keep the bottom plate 3 dry, there are at least two water suction grouting nozzles 4, and at least two water suction grouting nozzles 4 are distributed in a ring array along the existing grouting pipe 2 as the axis.

[0042] Similarly, see Figure 4 In order to improve the efficiency of the initial plugging of the bottom plate 3, the number of the initial plugging grouting nozzles 5 is at least two, and the at least two initial plugging grouting nozzles 5 are distributed in a ring array along the existing grouting pipe 2 as the axis.

[0043] Working principle of a construction method for treating water seepage in building basement floor: When water seepage and leak repair is required on a building base slab 3, the existing grouting pipe 2 is first located. Then, with the existing grouting pipe 2 as the center, the original decorative surface layer 1 is chiseled away within a 1000mm x 1000mm area until the structural surface layer of the base slab 3 is exposed. Next, a 300 x 30mm tapered groove is chiseled into the structural surface layer of the base slab 3, with the existing grouting pipe 2 as the center. The appropriate grouting method is selected by observing the water inflow rate from the chiseled opening of the base slab 3. In this embodiment, low-pressure grouting is used.

[0044] First, low-pressure grouting is performed into the existing grouting pipe 2 until the slurry overflows from the pipe mouth. This is to fill the gap between the basement floor 3 and the soil, to deal with the depletion of the basement floor 3 due to the disturbance of the lower soil, and at the same time cut off the path of groundwater upwelling; secondly, hydrophilic polyurethane is used to absorb the residual moisture in the reinforced concrete of the basement floor 3 to keep it as dry as possible; since acrylates can quickly dissolve in water to form a gel, acrylates are used to initially seal and fill the cracks in the basement floor; polyurea waterproof coating is used in two places. One is to inject polyurea waterproof coating into the periphery of the existing grouting pipe to fill the gap between the existing grouting pipe 2 and the surrounding floor concrete; the second is to use it in the surrounding small cracks. The surrounding small cracks only need to be surface sealed to complete the water seepage treatment of the floor 3.

[0045] To sum up, the use of hydrophilic polyurethane is used to solve the problems of moisture and water seepage in the base plate 3, the use of acrylate is used for primary sealing to solve the problem of water seepage in the concrete cracks around the existing grouting pipe 2 of the base plate 3, and the use of polyurea waterproof coating for secondary sealing can further enhance the waterproof sealing of the base plate 3, which is conducive to improving the stability of handling the water seepage of the base plate 3.

[0046] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A construction method for treating water seepage in a building basement floor, characterized in that: The steps include: S1: Organize construction according to on-site construction conditions and process arrangements; S2: Chiseling off the original decorative surface layer (1): Chiseling off the original decorative surface layer (1) around the existing grouting pipe (2) that is leaking water to the structural surface layer of the bottom plate (3), with the chiseling opening having a range of 1000mm*1000mm; S3: chisel away the concrete of the bottom plate (3) along the existing grouting pipe (2), the chiseled opening is a circle with a diameter of 300 mm and a depth of 30 mm (Φ300*30 mm); S4: Existing grouting pipe (2) low-pressure grouting: select a grouting method according to the on-site water seepage situation, perform grouting treatment, and grout to the hole mouth; S5: water absorption treatment: drilling holes along the periphery of the existing grouting pipe (2) to pre-embed a water absorption grouting nozzle (4), and injecting hydrophilic polyurethane into the water absorption grouting nozzle (4); S6: Primary plugging treatment: drilling holes around the existing grouting pipe (2) and pre-burying the primary plugging grouting nozzle (5), and injecting acrylate into the primary plugging grouting nozzle (5); S7: Treatment of surrounding cracks: pre-embed a crack grouting nozzle (6) along the crack periphery, and inject polyurea waterproof coating into the crack grouting nozzle (6); S8: Removal of redundant grout pipes: remove the parts of the existing grout pipes (2), water absorption grouting nozzles (4), primary plugging grouting nozzles (5), and crack grouting nozzles (6) protruding from the bottom plate (3); S9: Sealing the chiseled opening and secondary plugging: using a plugging material (9) to seal the chiseled opening of the bottom plate (3), and injecting a polyurea waterproof coating; S10: Pressing and applying the beneficial glue (10): Pressing and applying the beneficial glue (10) on the surface of the bottom plate (3); S11: Construction of the superimposed layer (13): tying steel bars at the chiseled opening of the original decorative surface layer (1) and pouring concrete; S12: Restoration of the building floor: After the construction of the superimposed layer (13) is completed, the floor is restored to the original decorative surface layer (1).

2. The construction method for treating water seepage in a building basement floor according to claim 1, characterized in that: The step S4 also includes the following steps: S4.1: Grouting uses 42.5 early-strength ordinary Portland cement, cement slurry with a water-cement ratio of 0.7-1.1 and a double-liquid slurry of 1:1 cement-water glass mixture; S4.2: Critical pressure: The initial pressure range of grouting pressure is 0.1-0.2Mpa, the final pressure of grouting is 0.2-0.3Mpa, and the pressure is maintained for 10 minutes; S4.3: When grouting begins, the grouting pipe is lowered to the bottom of the hole, the cement slurry is stirred according to the water-cement ratio requirements, and the grouting pump is started to press the cement slurry to the bottom of the hole until the cement slurry returns from the hole mouth; S4.4: Sealing and flushing: After grouting is completed, seal the hole.

3. The construction method for treating water seepage in a building basement floor according to claim 1, characterized in that: The water-absorbing grouting nozzle (4) in step S5 is pre-buried to 3 / 4 of the thickness of the bottom plate (3), and is stopped for 10-15 seconds after the first injection of the hydrophilic polyurethane, and then the hydrophilic polyurethane is injected for the second time.

4. The construction method for treating water seepage in a building basement floor according to claim 1, characterized in that: The initial plugging grouting nozzle (5) in step S6 is 10-15 cm away from the existing grouting pipe (2), and the initial plugging grouting nozzle (5) is pre-buried at 45° to 1 / 2 of the thickness of the bottom plate (3).

5. The construction method for treating water seepage in a building basement floor according to claim 1, characterized in that: The step S7 further comprises the following steps: S7.1: Open a 50mm*50mm V-shaped groove (12) at the crack of the bottom plate (3); S7.2: The crack grouting nozzle (6) is pre-buried at the crack at an angle of 45°, and polyurea waterproof coating is poured into the crack grouting nozzle (6); S7.3: After the grouting is completed, the portion of the crack grouting nozzle (6) protruding from the bottom plate (3) is cut off and smoothed; S7.4: Use epoxy repair adhesive to cover the crack, and the cover range is within 100 mm around the crack grouting nozzle (6).

6. The construction method for treating water seepage in a building basement floor according to claim 1, characterized in that: The step S9 also includes the following steps: S9.1: Arrange an open hole grouting pipe (11) along the periphery of the existing grouting pipe (2); S9.2: After the plugging material (9) is compacted, the opening grouting pipe (11) is evacuated; S9.3: After the plugging material (9) hardens, inject polyurea waterproof coating into the opening grouting pipe (11).

7. The construction method for treating water seepage in a building basement floor according to claim 1, characterized in that: The step S11 further comprises the following steps: S11.1: Added gluten (7), gluten (7) is set in two directions; S11.2: Add 180° hook reinforcement (8); S11.3: The hook steel bars (8) are arranged in a plum blossom shape, one end of the hook steel bars (8) is embedded in the bottom plate (3) to a depth of 15d, and the other end of the hook steel bars (8) is tied to the surface reinforcement (7).

8. The construction method for treating water seepage in a building basement floor according to claim 1, characterized in that: At least two water suction grouting nozzles (4) are provided, and the at least two water suction grouting nozzles (4) are respectively distributed in a ring array along the existing grouting pipe (2).

9. The construction method for treating water seepage in a building basement floor according to claim 1, characterized in that: At least two of the primary plugging grouting nozzles (5) are provided, and the at least two primary plugging grouting nozzles (5) are respectively distributed in a ring array along the existing grouting pipe (2).

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