Anti-seepage reinforcing method for existing concrete building

Abstract

The invention provides an anti-seepage reinforcing method for an existing concrete building, which comprises the following steps: step 1, a waterproof layer is built on the top of the concrete building, and the waterproof layer is positioned between a concrete structure layer and a concrete sloping layer; and secondly, wall cracks of the concrete building are blocked.

Description

Technical Field

[0001] The invention relates to the reinforcement of concrete buildings, in particular to a method for anti-leakage reinforcement of existing concrete buildings. Background Art

[0002] After a period of time, many concrete buildings will have cracks on the walls and roofs due to thermal expansion and contraction as the temperature changes throughout the year, which will cause leakage. At present, most of the remedial measures are mainly to paint some materials on the surface of the roof and walls. These materials are difficult to integrate with the original building materials, and it is also difficult to fill the internal cracks. Therefore, these measures are only effective for a short period of time, and leakage will occur again after a period of time. Summary of the invention

[0003] The main purpose of the present invention is to provide a method for reinforcing an existing concrete building against leakage, which is used to reinforce the existing concrete building to achieve the effect of preventing leakage.

[0004] To achieve the above purpose, the technical solution adopted by the present invention is: a method for anti-leakage reinforcement of an existing concrete building, the existing concrete building includes a wall and a top supported on the wall, the top generally includes a concrete structure layer and a concrete slope layer from bottom to top, the method includes the following steps:

[0005] Step 1: Build a waterproof layer on the top of the concrete building, the waterproof layer is located between the concrete structure layer and the concrete slope layer;

[0006] Step 1 specifically includes the following steps:

[0007] Step 11: Install the mobile guardrail in sections;

[0008] Step 12: drilling holes on the top of the concrete building, with multiple holes arranged in a plum blossom shape, and the holes extending between the concrete structure layer and the concrete slope layer;

[0009] Step 13: After the drilling is completed, clean the dust in the hole;

[0010] Step 14: bury a grouting nozzle in each hole, with the grouting nozzle exposed to the ground for a certain distance;

[0011] Step 15, connect the grouting machine to the grouting nozzle;

[0012] Step 16: The grouting machine is operated to inject the mixture of acrylic nitrile grouting water blocking glue and cement into the gap between the concrete structure layer and the concrete slope layer and the cracks in the concrete structure layer;

[0013] Step 18, by observing the exhaust pressure of the adjacent grouting pipe, determine whether the grouting part corresponding to the grouting nozzle has covered the surface of the concrete structure layer. If it is determined that the surface of the concrete structure layer has been covered, perform steps 15-18 on the next adjacent hole until all the holes are grouted;

[0014] Step 19, wait for a while to allow the acrylic nitrile grouting water plugging glue to initially gel;

[0015] Step 110, using a grouting machine to grout each hole with a two-component polyacrylate high-elastic grouting water-blocking glue;

[0016] Step 111, wait for a while, until the two-component polyacrylate high-elastic grouting water-blocking glue is gelled, and then remove the grouting nozzle;

[0017] Step 112: Use epoxy mortar to seal and compact the hole.

[0018] Preferably, before executing step 16, a certain amount of water is first injected through a grouting machine.

[0019] Preferably, the step one further comprises step 113, filling the surface of the concrete slope layer with asphalt seeds to form an asphalt surface layer on the top surface.

[0020] Preferably, the method further comprises step 2 of sealing the wall cracks of the concrete building, which specifically comprises the following steps:

[0021] Step 21: Install the mobile guardrail in sections;

[0022] Step 22: along the extension direction of the crack, holes are drilled on the walls on both sides thereof, the holes on both sides are arranged in a staggered manner, and as the holes go deeper, the holes are inclined toward the crack at a certain inclination angle;

[0023] Step 23: After the drilling is completed, clean the dust in the hole;

[0024] Step 24, bury the grouting nozzle in the hole, with one end of the grouting nozzle exposed to a certain length;

[0025] Step 25, connect the grouting machine to the grouting nozzle for grouting, and the grouting material is a two-component high-permeability epoxy material;

[0026] Step 26, after the two-component high-permeability water-based annular material in all holes solidifies, remove the grouting nozzle;

[0027] Step 27, sealing the hole with epoxy mortar;

[0028] Step 28: Use a hand grinder to grind the crack grouting area.

[0029] Preferably, the method further comprises step 29, wherein slurry is prepared by using NYS acrylic copolymer emulsion and PO425 cement to perform primer coating on the cracks.

[0030] Preferably, when executing step 25, the following steps need to be performed first:

[0031] When grouting the first hole, the grouting pressure is debugged and the stable pressure is determined according to the crack conditions. When debugging the pressure, the pressure starts from the initial value and gradually increases to the stable pressure.

[0032] Preferably, when executing step 25, according to the set grouting pressure, when the grout circulates in the grouting nozzle, the grouting of the hole is completed and the grouting of the adjacent hole is transferred.

[0033] The present invention also provides a method for anti-leakage reinforcement of existing concrete buildings.

[0034] The existing concrete building includes a wall and a top supported on the wall, and the top generally includes a concrete structure layer and a concrete slope layer from bottom to top. The method includes the following steps:

[0035] Step 21: Install the mobile guardrail in sections;

[0036] Step 22: along the extension direction of the crack, holes are drilled on the walls on both sides thereof, the holes on both sides are arranged in a staggered manner, and as the holes go deeper, the holes are inclined toward the crack at a certain inclination angle;

[0037] Step 23: After the drilling is completed, clean the dust in the hole;

[0038] Step 24, bury the grouting nozzle in the hole, with one end of the grouting nozzle exposed to a certain length;

[0039] Step 25, connect the grouting machine to the grouting nozzle for grouting, and the grouting material is a two-component high-permeability epoxy material;

[0040] Step 26, after the two-component high-permeability water-based annular material in all holes solidifies, remove the grouting nozzle;

[0041] Step 27, sealing the hole with epoxy mortar;

[0042] Step 28: Use a hand grinder to grind the crack grouting area.

[0043] Compared with the prior art, the present invention has the following beneficial effects:

[0044] 1) The reinforcement method of the present invention can form a waterproof layer on the top by means of drilling and grouting, and the waterproof slurry can penetrate into the cracks on the top, which can play a good anti-leakage effect; holes are drilled around the cracks in the wall, and the holes are inclined through the cracks, and the slurry penetrates into the cracks from the holes to seal the cracks. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a cross-sectional view of the top of a building after drilling and reinforcement according to the present invention;

[0046] Figure 2 and 3 It is a cross-sectional view of punching holes in cracks of building walls according to the present invention. DETAILED DESCRIPTION

[0047] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0048] The existing concrete building includes walls and a top, and the top generally includes a concrete structure layer 1 and a concrete slope leveling layer 2 from bottom to top.

[0049] A method for anti-leakage reinforcement of an existing concrete building comprises the following steps:

[0050] Step 1: Build a waterproof layer 4 on the top of the concrete building. The waterproof layer 4 is located between the concrete structure layer 1 and the concrete slope layer 2. Figure 1 ;

[0051] Step 2: Seal the cracks in the concrete wall, see Figure 2 and Figure 3 .

[0052] Step 1 specifically includes the following steps:

[0053] Step 11: Install the mobile guardrail in sections;

[0054] Step 12: Use a Φ14 drill to drill holes in a plum blossom shape on the top of the concrete building. The spacing between adjacent holes in the same row and column is 1.5m, and the hole depth is about 27cm;

[0055] Step 13: After the drilling is completed, use a hair dryer to clean the dust in the hole, or inject water to clean it;

[0056] Step 14: Use a grouting nozzle 5 of Φ13, with a length of 30 cm, one end of which is buried in the hole and the other end is exposed about 3 cm above the ground;

[0057] Step 15: After the grouting machine is connected to the grouting nozzle 5, clean water is first injected into the concrete structure layer to ensure that the base surface is moistened, so that the slurry can flow better during the formal grouting, and then cover the entire top to form a waterproof layer;

[0058] Step 16, pouring nitrile acrylic grouting water plugging glue, and determining the ratio of acrylic nitrile grouting water plugging glue to cement according to actual conditions, preferably, nitrile acrylic grouting water plugging glue: cement = 10:1; at the same time, according to actual conditions, a commercial hardener or an early strength agent can be added to the acrylic nitrile grouting water plugging glue to achieve early strength hardening effect;

[0059] Step 17: Use a grouting machine to evenly inject slurry into the gap between the concrete structure layer 1 and the concrete slope layer 2, and seal all cracks in the concrete structure layer by filling, penetrating and compacting, and densely bonding to form a new concrete structure layer with high impermeability and good stability;

[0060] Step 18, by observing the exhaust pressure of the adjacent grouting pipe, determine whether the grouting part corresponding to the grouting nozzle 5 has covered the surface of the concrete structure layer, and when it is confirmed that the surface of the concrete structure layer has been covered, perform steps 15-18 for the next adjacent hole;

[0061] Step 19: After waiting for 1 hour, the acrylic nitrile grouting water plugging glue is initially solidified;

[0062] Step 110, pouring two-component polyacrylate high elastic grouting water blocking glue through a grouting machine;

[0063] Step 111, wait for a while, until the two-component polyacrylate high-elastic grouting water-blocking glue is gelled, and then remove the grouting nozzle 5;

[0064] Step 112, using epoxy mortar to seal and compact the hole;

[0065] Step 113: Fill and compact the surface of the slope leveling layer with asphalt seeds (cold material) to form an asphalt surface layer 6 on the top surface.

[0066] Step 2 specifically includes the following steps:

[0067] Step 21: Install the mobile guardrail in sections;

[0068] Step 22: along the extension direction of the crack, holes are drilled on the walls on both sides thereof, the holes on both sides are arranged in a staggered manner, the diameter of the holes is Φ10 mm, the spacing between the holes on the same side is 25 cm, and as the holes go deeper, the holes are inclined toward the cracks at an angle of about 45°, and the hole depth is 2 / 3 of the wall thickness; the inclination angle of the holes can be determined according to the depth of the cracks, and preferably, the holes pass through the cracks;

[0069] Step 23: After drilling, use a hair dryer to clean the dust in the hole;

[0070] Step 24: Use a grouting nozzle with a length of 15 cm and a diameter of 13 mm and bury it in the hole;

[0071] Step 25: Connect the grouting machine to the grouting nozzle for grouting. The grouting material is a two-component high-permeability epoxy material. The grouting requirements are as follows:

[0072] a. When grouting the first hole, conduct grouting pressure adjustment and determine the stable pressure according to the crack conditions;

[0073] b. When debugging the pressure, the pressure can start from 2.0MPa and gradually increase. The ideal pressure is controlled at 15MPa. Of course, the pressure can be changed according to the on-site conditions;

[0074] c. The grouting volume can be 4 liters / minute;

[0075] d. According to the set grouting pressure, when the grout circulates in the grouting nozzle, the grouting of the hole is completed and the grouting of the adjacent hole can be transferred;

[0076] Step 26, after the two-component high-permeability water-based annular material in all holes solidifies, remove the grouting nozzle;

[0077] Step 27, sealing the hole with epoxy mortar;

[0078] Step 28: Grind the crack grouting area with a hand grinder;

[0079] Step 29: Use NYS acrylic copolymer emulsion and PO425 cement to make a slurry and prime the cracks.

[0080] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention. These changes and improvements fall within the scope of the present invention. The scope of protection claimed by the present invention is defined by the attached claims and their equivalents.

Claims

1. A method for anti-leakage reinforcement of an existing concrete building, wherein the existing concrete building comprises a wall and a top supported on the wall, wherein the top generally comprises a concrete structural layer and a concrete slope layer from bottom to top, and wherein: The reinforcement method comprises the following steps: Step 1: Build a waterproof layer on the top of the concrete building, the waterproof layer is located between the concrete structure layer and the concrete slope layer; Step 1 specifically includes the following steps: Step 11: Install the mobile guardrail in sections; Step 12: drilling holes on the top of the concrete building, with multiple holes arranged in a plum blossom shape, and the holes extending between the concrete structure layer and the concrete slope layer; Step 13: After the drilling is completed, clean the dust in the hole; Step 14: bury a grouting nozzle in each hole, with the grouting nozzle exposed to the ground for a certain distance; Step 15, connect the grouting machine to the grouting nozzle; Step 16: The grouting machine is operated to inject the mixture of acrylic nitrile grouting water blocking glue and cement into the gap between the concrete structure layer and the concrete slope layer and the cracks in the concrete structure layer; Step 18, by observing the exhaust pressure of the adjacent grouting pipe, determine whether the grouting part corresponding to the grouting nozzle has covered the surface of the concrete structure layer. If it is determined that the surface of the concrete structure layer has been covered, perform steps 15-18 on the next adjacent hole until all the holes are grouted; Step 19, wait for a while to allow the acrylic nitrile grouting water plugging glue to initially gel; Step 110, using a grouting machine to grout each hole with a two-component polyacrylate high-elastic grouting water-blocking glue; Step 111, wait for a while, until the two-component polyacrylate high-elastic grouting water-blocking glue is gelled, and then remove the grouting nozzle; Step 112: Use epoxy mortar to seal and compact the hole.

2. The reinforcement method according to claim 1, characterized in that: Before executing step 16, a certain amount of water is injected through the grouting machine.

3. The reinforcement method according to claim 1, characterized in that: The step one also includes step 113, filling the surface of the concrete slope layer with asphalt seeds to form an asphalt surface layer on the top surface.

4. The reinforcement method according to claim 1, characterized in that: The method further includes step 2 of sealing the cracks in the wall of the concrete building, which specifically includes the following steps: Step 21: Install the mobile guardrail in sections; Step 22: Drill holes on the walls on both sides of the crack along its extension direction. The holes on both sides are arranged alternately. As the hole goes deeper, it tilts toward the crack at a certain angle; Step 23: After the drilling is completed, clean the dust in the hole; Step 24, bury the grouting nozzle in the hole, with one end of the grouting nozzle exposed to a certain length; Step 25, connect the grouting machine to the grouting nozzle for grouting, and the grouting material is a two-component high-permeability epoxy material; Step 26, after the two-component high-permeability water-based annular material in all holes solidifies, remove the grouting nozzle; Step 27, sealing the hole with epoxy mortar; Step 28: Use a hand grinder to grind the crack grouting area.

5. The reinforcement method according to claim 4, characterized in that: The method also includes step 29, using NYS acrylic copolymer emulsion and PO425 cement to prepare slurry for priming the cracks.

6. The reinforcement method according to claim 4, characterized in that: When executing step 25, you need to perform the following steps first: When grouting the first hole, the grouting pressure is debugged and the stable pressure is determined according to the crack conditions. When debugging the pressure, the pressure starts from the initial value and gradually increases to the stable pressure.

7. The reinforcement method according to claim 4, characterized in that: When executing step 25, according to the set grouting pressure, when the grout circulates in the grouting nozzle, the grouting of the hole is completed and the grouting of the adjacent hole is transferred.

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