Method for preventing water and leaking stoppage of inverted roof through high-pressure grouting

Abstract

The invention discloses an inverted roof high-pressure grouting waterproof plugging method which comprises the following steps: S1, firstly, determining a water seepage position, and cleaning a roof around the water seepage position to determine a grouting plugging range; s2, according to the grouting position of the wall body, the structure thickness of a building method is determined, the depth of drilled grouting holes is determined, and the grouting holes are distributed; and grouting water stop needle heads are embedded in the grouting holes. According to the method, inverted roof leakage repairing is carried out, construction with water can be carried out, the construction period is short, and the non-seepage and non-leakage effect can be completely achieved through a 24-48 h closed water test; meanwhile, inverted roof leakage repairing can be carried out, the original structure of the building does not need to be damaged, and the structural safety of the building subjected to leaking stoppage repairing is guaranteed; and compared with a roof waterproof structure which is integrally manufactured again, the cost is greatly reduced.

Description

Technical Field

[0001] The invention relates to the technical field of building waterproofing, and in particular to a method for high-pressure grouting waterproofing and leak-proofing of an inverted roof. Background Art

[0002] Inverted roofing has become the mainstream choice due to its advantages such as improved waterproofing reliability, simplified construction, and extended waterproofing layer life. However, roof leaks are still inevitable, seriously affecting the user experience and reducing the building's service life.

[0003] Roof leaks are typically located by locating the leak point inside the house. However, if the waterproof layer of an inverted roof leaks, water can break through. Patent CN111779201A relates to a method for plugging leaks in an inverted roof, but the layout of the grouting holes is unclear, and the spacing between the grouting holes is slightly larger.

[0004] The commonly used grouting and leak repair methods at present are epoxy resin and polyurethane foam grouting. Epoxy resin is mostly used for structural reinforcement of buildings, while polyurethane foam grouting is mostly used for leak repair of buildings.

[0005] Although polyurethane foam grouting sealing materials have the characteristics of instant expansion and water stopping during construction, they also have the disadvantages that there may be gaps in the foam itself and it will shrink in the future. It often leaks again three months after construction and cannot completely solve the leakage problem.

[0006] Therefore, how to achieve rapid grouting and plugging of leakage parts, improve the quality of plugging, and improve the durability of plugging without destroying the original structure and function of the building to meet the current needs of building development is a technical problem that technical personnel in this field urgently need to solve. Summary of the Invention

[0007] The purpose of the present invention is to provide a method for high-pressure grouting waterproofing and plugging in an inverted roof. The high-pressure grouting and plugging method can realize rapid grouting and plugging of the roof of a basement or underground garage, improve the plugging quality, improve the durability of the plugging, and do not destroy the original structure and function of the building, thereby meeting the current needs of building development.

[0008] In order to achieve the above object, the present invention adopts the following technical solutions:

[0009] A method for high-pressure grouting waterproofing and leak-proofing of an inverted roof comprises the following steps:

[0010] S1. First, identify the water seepage location and clean the roof around the water seepage location to determine the scope of grouting and plugging.

[0011] S2. Determine the thickness of the building structure according to the grouting position of the wall, determine the depth of the grouting holes, and arrange the grouting holes; and bury the grouting water stop needles in the grouting holes;

[0012] S3, using grouting equipment to pour elastic resin grouting material into the grouting holes of step 2), with a pouring pressure of 0.6-0.8 MPa. When the grouting volume of each grouting hole is ≤2 L / min and the pressure is stable for more than 1 min, stop grouting;

[0013] S4. One hour after the first grouting is completed and the elastic resin grouting material at the crack opening is completely cured, remove the original water stop needle, continue drilling on the basis of the original grouting hole, and bury a new water stop needle;

[0014] S5. Use grouting equipment to inject a two-component cement-based waterproof slurry into the new water-stop needle in step 4) at a grouting pressure of 0.4-0.6 MPa. Stop grouting when the grouting volume of each grouting hole is ≤1 L / min and the pressure is stable for more than 1 minute;

[0015] S6. 2 hours after grouting, conduct water-tightness test to observe the sealing effect;

[0016] S7. If there is leakage, repeat steps 5 and 6 until the leakage point stops.

[0017] S8. After the leak is successfully plugged, remove the water-stop needle and seal the grouting hole with leak-stopping agent. At the same time, use polymer waterproof mortar to paint the entire grouting range.

[0018] Preferably, the grouting range is extended outward by more than 500 mm based on the indoor water overflow location to ensure that all leakage locations are covered.

[0019] Preferably, the depth of the first grouting hole is ≥20mm into the leveling layer under the waterproof layer.

[0020] Preferably, the depth of the secondary grouting hole should be deep enough to allow the waterproof membrane layer to be visible.

[0021] Preferably, sheet-like leaks should be arranged in a plum blossom pattern; linear leaks should be arranged in a straddling pattern; the spacing between grouting holes should be ≤500mm, and the distance between edge grouting holes and the grouting range should be ≤200mm.

[0022] Preferably, the elastic resin grouting material is an elastomer grouting material, which is composed of acrylic resin, a cross-linking agent, and water, and component B is composed of a curing agent, a mesh aggregate, and additives.

[0023] Preferably, the elastic resin grouting material component A is made of the following raw materials in weight percentage: 20%-30% acrylic resin, 10%-20% potassium acrylate, 0.5%-1.5% N,N'-methylenebisacrylamide, 0.5%-1.0% ammonium persulfate, appropriate amount of defoaming agent and leveling agent, and the balance water.

[0024] Preferably, the elastic resin grouting material component B is made of the following raw materials in weight percentage: 30%-50% ordinary Portland cement, 10%-20% aluminum sulfate cement, 10%-20% quartz powder, 5%-10% silicon dioxide, 0.5%-1.5% water reducer, 1%-3% expansion agent, and 0.5%-1.0% waterproofing agent.

[0025] Preferably, the two-component cement-based waterproof slurry consists of component A which is a liquid material composed of acrylic emulsion, defoamer and leveling agent, etc., and component B which is a powder prepared by grinding, stirring and sieving cement silica, etc.

[0026] Preferably, component A of the two-component cement-based waterproof slurry is made of the following raw materials in percentage by weight: 30%-50% acrylic resin, 0.1%-0.5% defoaming agent, 0.2%-0.8% leveling agent, 0.1%-0.5% wetting agent and the balance water.

[0027] Preferably, component B of the two-component cement-based waterproof slurry is made of the following raw materials in the following weight percentages: 30%-50% ordinary Portland cement, 10%-20% quartz sand, 5%-10% silicon dioxide, 0.5%-1.5% water reducer, 1%-2% waterproofing agent, 1%-2% expansion agent and the balance water.

[0028] The beneficial effects of the present invention are:

[0029] 1. The method of the present invention is used to repair inverted roof leakage, which can be carried out with water, has a short construction period, and can completely achieve the effect of no leakage after a 24-48h closed water test.

[0030] 2. The method of the present invention is used to repair inverted roof leakage without destroying the original structure of the building, thus ensuring the structural safety of the building after the leak is repaired.

[0031] 3. Compared with re-roof waterproofing, the method of the present invention is economical. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 Schematic diagram of grouting range and grouting hole arrangement;

[0033] Figure 2 This is a schematic diagram of the cross section of the grouting hole for the first grouting;

[0034] Figure 3 This is a schematic diagram of the cross section of the secondary grouting grouting hole;

[0035] In the figure: 1 water stop needle, 2 grouting hole, 3 protective layer and roof surface layer, 4 isolation layer, 5 insulation layer, 6 waterproof layer, 7 leveling layer, 8 slope layer, 9 roof structure board, 10 grouting range, 11 leakage and water range. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0037] Reference Figure 1-3 A method for high-pressure grouting waterproofing and leak-proofing of an inverted roof comprises the following steps:

[0038] S1. First, identify the water seepage location and clean the roof around the water seepage location to determine the scope of grouting and plugging.

[0039] S2. According to the roof grouting position and the thickness of the roof construction method, the grouting hole depth is determined and the grouting holes are arranged. Grouting water stop needles are buried in the grouting holes;

[0040] S3, using grouting equipment to pour elastic resin grouting material into the grouting holes of step 2), with a pouring pressure of 0.6-0.8 MPa. When the grouting volume of each grouting hole is ≤2 L / min and the pressure is stable for more than 1 min, stop grouting;

[0041] S4. After the first grouting is completed for 12 hours and the elastic resin grouting material at the crack opening is completely cured, remove the original water stop needle, continue drilling on the basis of the original grouting hole, and bury a new water stop needle;

[0042] S5. Use grouting equipment to inject a two-component cement-based waterproof slurry into the new water-stop needle in step 4) at a grouting pressure of 0.4-0.6 MPa. Stop grouting when the grouting volume of each grouting hole is ≤1 L / min and the pressure is stable for more than 1 minute;

[0043] S6. 24 hours after grouting, conduct water-tightness test to observe the sealing effect;

[0044] S7. If there is leakage, repeat steps 5 and 6 until the leakage point stops.

[0045] S8. After the leak is successfully plugged, remove the water-stop needle and seal the grouting hole with leak-stopping agent. At the same time, use polymer waterproof mortar to brush the entire grouting area;

[0046] The sealing principle of the high-pressure grouting sealing method for basement or underground garage roof provided in this application is as follows:

[0047] 1. The elastic resin has extremely low viscosity and good permeability, which can ensure that the slurry can penetrate into gaps as wide as 0.1mm. The curing time of acrylate is adjustable, with fast curing taking only 30s-2min and slow curing taking more than 10min. The gel has high elasticity and an elongation of up to 200%, effectively solving the problem of structural expansion and contraction. Elasticity does not require continuous contact with water. The added expansion component has an expansion rate of more than 100% when exposed to water, solving the problem of dry-wet cycling of the gel. The elastic resin has good chemical resistance to most acids and alkalis and is not affected by biological invasion;

[0048] 2. Taking advantage of the elastic resin's low initial viscosity, large permeability coefficient, and ability to penetrate into tiny cracks or pores, the first grouting is used to form a new waterproof layer between the waterproof layer and the structural layer. At the same time, the good elasticity of the gel and the expansibility of the expansion part are used to ensure a tight fit between the new waterproof layer and the original waterproof layer.

[0049] 3. The two-component cement-based waterproof slurry has good adhesion to a variety of substrates (such as concrete and masonry). At the same time, the polymer emulsion provides elasticity and adapts to the slight deformation of the substrate. After curing, it forms a dense waterproof layer that effectively prevents water penetration.

[0050] 4. According to the characteristics of the above-mentioned cement-based waterproof slurry, a new waterproof layer is formed on the upper part of the original waterproof layer during the secondary grouting. This waterproof layer can effectively combine with the original waterproof layer and repair the failed part of the original waterproof layer at the same time;

[0051] 5. This application utilizes the inverted roof waterproofing layout characteristics, the combination of building structural materials and different grouting materials, to form a new waterproof layer below the waterproof layer at the leakage site during the first grouting, and to repair the original waterproof failure while forming a new second waterproof layer above the waterproof layer at the leakage site during the second grouting.

[0052] 7. This application not only repairs the original waterproof failure part, but also forms two waterproof layers above and below the original waterproof layer, effectively strengthening the leakage part, improving the quality of the plugging, and improving the durability of the plugging without destroying the original structure and function of the building, meeting the current construction development needs;

[0053] 6. The present invention has no restrictions on the processing equipment and process parameters not mentioned in the above method, and the processing equipment and process parameters well known to those skilled in the art can be used.

[0054] Example 1:

[0055] like Figure 1 , Figure 2 , Figure 3As shown:

[0056] The inverted roof leak repair construction scheme designed according to the present invention has the following specific steps:

[0057] S1. First, identify the location of water seepage and clean the roof around the location to determine the scope of grouting and plugging.

[0058] S2. According to the roof grouting position and the thickness of the roof construction method, the grouting hole depth is determined and the grouting holes are arranged. Grouting water stop needles are buried in the grouting holes.

[0059] S3. Use grouting equipment to inject elastic resin grouting material into the grouting holes of S2 with a grouting pressure of 0.6 MPa. Stop grouting when the grouting volume of each grouting hole is ≤2 L / min and the pressure is stable for more than 1 minute.

[0060] S4. After the first grouting is completed for 12 hours and the elastic resin grouting material at the crack opening is completely cured, remove the original water stop needle, continue drilling on the basis of the original grouting hole, and bury a new water stop needle;

[0061] S5. Use grouting equipment to inject two-component cement-based waterproof slurry into the new water-stop needle in step 4) at a grouting pressure of 0.4 MPa. Stop grouting when the grouting volume of each grouting hole is ≤1 L / min and the pressure is stable for more than 1 minute.

[0062] S6. 24 hours after the grouting is completed, a water-tightness test is carried out to ensure that no leakage occurs at the leakage point.

[0063] S7. After the leak is successfully plugged, remove the water-stop needle and seal the grouting hole with leak-stopping agent. At the same time, use polymer waterproof mortar to brush the entire grouting area;

[0064] Example 2:

[0065] like Figure 1 , Figure 2 , Figure 3 As shown:

[0066] The inverted roof leak repair construction scheme designed according to the present invention has the following specific steps:

[0067] S1. First, identify the location of water seepage and clean the roof around the location to determine the scope of grouting and plugging.

[0068] S2. According to the roof grouting position and the thickness of the roof construction method, the grouting hole depth is determined and the grouting holes are arranged. Grouting water stop needles are buried in the grouting holes.

[0069] S3. Use grouting equipment to pour elastic resin grouting material into the grouting holes of step S2 at a grouting pressure of 0.8 MPa. Stop grouting when the grouting volume of each grouting hole is ≤2 L / min and the pressure is stable for more than 1 minute.

[0070] S4. After the first grouting is completed for 2 hours and the elastic resin grouting material at the crack opening is completely cured, remove the original water stop needle, continue drilling on the basis of the original grouting hole, and bury a new water stop needle;

[0071] S5. Use grouting equipment to inject two-component cement-based waterproof slurry into the new water-stop needle in step 4) at a grouting pressure of 0.6 MPa. Stop grouting when the grouting volume of each grouting hole is ≤1 L / min and the pressure is stable for more than 1 minute.

[0072] S6. 24 hours after the grouting is completed, a water-tightness test is carried out to ensure that no leakage occurs at the leakage point.

[0073] After the leak is successfully plugged, remove the water-stop needle and seal the grouting hole with leak-stopping agent. At the same time, use polymer waterproof mortar to paint the entire grouting range.

[0074] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A method for high-pressure grouting waterproofing and leak-proofing of an inverted roof, characterized in that: The following steps are involved: S1. First, identify the water seepage location and clean the roof around the water seepage location to determine the scope of grouting and plugging. S2. Determine the thickness of the building structure according to the wall grouting position, determine the depth of the grouting holes, and arrange the grouting holes; And bury the grouting water stop needle in the grouting hole; S3, using grouting equipment to pour elastic resin grouting material into the grouting holes of step 2), with a pouring pressure of 0.6-0.8 MPa. When the grouting volume of each grouting hole is ≤2 L / min and the pressure is stable for more than 1 min, stop grouting; S4. One hour after the first grouting is completed and the elastic resin grouting material at the crack opening is completely cured, remove the original water stop needle, continue drilling on the basis of the original grouting hole, and bury a new water stop needle; S5. Use grouting equipment to inject a two-component cement-based waterproof slurry into the new water-stop needle in step 4) at a grouting pressure of 0.4-0.6 MPa. Stop grouting when the grouting volume of each grouting hole is ≤1 L / min and the pressure is stable for more than 1 minute; S6. 2 hours after grouting, conduct water-tightness test to observe the sealing effect; S7. If there is leakage, repeat steps 5 and 6 until the leakage point stops. S8. After the leak is successfully plugged, remove the water-stop needle and seal the grouting hole with leak-stopping agent. At the same time, use polymer waterproof mortar to paint the entire grouting range.

2. A method for waterproofing and plugging inverted roofing by high-pressure grouting according to claim 1, characterized in that: The grouting range is extended outward by more than 500mm based on the indoor water leakage location to ensure that all leakage locations are covered.

3. The method for high-pressure grouting waterproofing and leak-proofing of an inverted roof according to claim 1, characterized in that: The depth of the first grouting hole should be ≥20mm into the leveling layer under the waterproof layer.

4. The method for high-pressure grouting waterproofing and leak-proofing of an inverted roof according to claim 1, characterized in that: The depth of the secondary grouting hole should be such that the waterproof membrane layer can be seen.

5. The method for high-pressure grouting waterproofing and leak-proofing of an inverted roof according to claim 1, characterized in that: For sheet-like leaks, a plum blossom pattern is used; for linear leaks, a straddle pattern is used; the spacing between grouting holes is ≤500mm. The distance between edge grouting holes and the grouting range is ≤200mm.

6. The method for high-pressure grouting waterproofing and leak-proofing of an inverted roof according to claim 1, characterized in that: The elastic resin grouting material is an elastomer grouting material, which is composed of acrylic resin, a cross-linking agent, and water, and the B component is composed of a curing agent, a mesh aggregate, and additives.

7. The method for high-pressure grouting waterproofing and leak-proofing of an inverted roof according to claim 1, characterized in that: The acrylic resin slurry component A is made of the following raw materials in weight percentage: 20%-30% acrylic resin, 10%-20% potassium acrylate, 0.5%-1.5% N,N'-methylenebisacrylamide, 0.5%-1.0% ammonium persulfate, appropriate amounts of defoaming agent and leveling agent, and the balance water.

8. The method for high-pressure grouting waterproofing and leak-proofing of an inverted roof according to claim 1, characterized in that: The elastic resin grouting material component B is made of the following raw materials in weight percentage: 30%-50% ordinary Portland cement, 10%-20% aluminum sulfate cement, 10%-20% quartz powder, 5%-10% silicon dioxide, 0.5%-1.5% water reducer, 1%-3% expansion agent, and 0.5%-1.0% waterproofing agent.

9. The method for high-pressure grouting waterproofing and leak-proofing of an inverted roof according to claim 1, characterized in that: The two-component cement-based waterproof slurry comprises component A, which is a liquid material composed of acrylic emulsion, defoaming agent, and leveling agent, and component B, which is a powder prepared by grinding, stirring, and sieving cement silica.

10. The method for high-pressure grouting waterproofing and leak-proofing of an inverted roof according to claim 1, characterized in that: The two-component cement-based waterproof slurry component A is made of the following raw materials in percentage by weight: 30%-50% of acrylic resin, 0.1%-0.5% of defoaming agent, 0.2%-0.8% of leveling agent, 0.1%-0.5% of wetting agent and the balance of water.

11. The method for high-pressure grouting waterproofing and leak-proofing of an inverted roof according to claim 1, characterized in that: The two-component cement-based waterproof slurry component B is made of the following raw materials in the following weight percentages: 30%-50% ordinary Portland cement, 10%-20% quartz sand, 5%-10% silicon dioxide, 0.5%-1.5% water reducer, 1%-2% waterproofing agent, 1%-2% expansion agent and the balance water.

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