Repair treatment process for hollowing area of concrete floor

Abstract

The invention discloses a concrete floor hollowing area grouting repair treatment process which comprises the following steps: S1, drilling holes in a floor hollowing area, respectively drilling pin holes and grouting holes, and cleaning dust in the holes; s2, pins are arranged at the hollowing position of the plain concrete ground surface layer; s3, a grouting nozzle is arranged at the hollowing position of the plain concrete ground surface layer; s4, the joint-cut part of the concrete ground is cleaned; s5, a polymer cement-based grouting material is injected into the grouting nozzle through a low-pressure grouting machine, and it is ensured that the hollowing area of the floor is densely filled; and S6, joint cutting is conducted on the joint-sealed part of the concrete ground again, the cut joint is treated through epoxy resin materials, and it is guaranteed that the edge of the cut joint is neat, and sealing is good. By means of the key technology of drilling, pin implanting, grouting nozzle implanting, seam sealing, grouting and seam cutting, the vacancy of the repairing process for hollowing of the concrete ground can be effectively made up.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, in particular to a repair and treatment process for a hollow area of ​​a concrete floor. Background Art

[0002] Hollowing is caused by incomplete cleaning of the base layer during the concrete pouring process, which makes the newly poured concrete unable to firmly bond with the base layer, or by uneven expansion and contraction caused by the temperature difference between high and low temperatures.

[0003] There are various reasons for the formation of concrete hollowing in construction projects, as follows:

[0004] (1) Concrete hollowing caused by incomplete cleaning of the base layer.

[0005] (2) Concrete hollowing caused by the base surface being too smooth.

[0006] (3) Concrete hollowing caused by insufficient moisture in the base layer or excessive water accumulation.

[0007] (4) Concrete hollowing caused by insufficient compaction of concrete.

[0008] (5) Concrete hollowing caused by uneven concrete pouring thickness.

[0009] Hollowing of concrete floors can cause great damage and harm to building structures, mainly including decreased ground bearing capacity, damaged ground flatness, and deterioration in appearance quality.

[0010] At present, the methods for treating concrete cracks at home and abroad mainly include re-casting concrete, surface treatment and repair, cutting and repairing, resin injection, and microporous grouting technology. The above methods can effectively repair the hollow area of ​​concrete, but the appearance of the repaired hollow area is too different from the surrounding environment, which is visually unsightly. Therefore, the present invention aims at the obvious hollowing of the basement floor slab. On the basis of concrete microporous grouting technology, the construction process is improved, and while effectively repairing the hollow area of ​​concrete, the appearance of the repaired hollow area of ​​concrete is beautified, so that it is integrated with the surrounding environment, and the concrete slab in the hollow area can be prevented from warping. Summary of the invention

[0011] The present invention provides a concrete floor hollowing repair process for obvious hollowing of concrete floors, wherein a round cap-shaped pin is implanted into concrete and a grouting nozzle is implanted to seal the hollowing area of ​​the concrete floor, and a low-pressure grouting machine is used to inject a polymer cement-based grouting material into the grouting nozzle to re-cut the sealed part of the concrete floor. The ability of the hollowing area of ​​the concrete to maintain after repair is improved, and the appearance of the hollowing area of ​​the concrete is also beautified.

[0012] A concrete floor hollow repair process, comprising the following steps:

[0013] S1: Drill holes in the hollow area 1 of the floor and clean the dust in the holes;

[0014] S2: Arrange pins 2 in the hollow area of ​​the concrete floor;

[0015] S3: Arrange a grouting nozzle 3 in the hollow area 1 of the concrete floor;

[0016] S4: The concrete floor has been previously cut and sealed, and epoxy cement sealing material is injected into the cut 4;

[0017] S5: Use a low-pressure grouting machine to inject the polymer cement-based grouting material into the grouting nozzle 3 to ensure that the hollow area 1 is filled densely;

[0018] S6: Re-cut the sealed joints of the concrete floor 4.

[0019] Preferably, in step S1, when drilling pin holes and grouting nozzle holes, an electric hammer is used to drill the pin holes and grouting nozzle holes, and it is ensured that the pin holes are implanted into the building surface layer and the depth of the structural layer is not less than 100 mm, and the depth of the grouting nozzle hole should reach the bottom of the hollow layer but not penetrate the structural layer.

[0020] Preferably, in step S2, after the pin is driven in, its firmness should be checked to ensure that it is tightly combined with the floor without looseness or tilting. If the pin is higher than the decorative surface layer, a punch can be used to gently tap the pin head. Use anchoring glue to fully stick and fix, so that the round cap reinforcement of the pin cap is tightly and reliably with the base surface. Wipe the excess caulking agent or repair material around the pin with a damp cloth to ensure that the surface of the decorative surface layer is clean and tidy.

[0021] Preferably, when the grouting nozzle is implanted in step S3, the grouting nozzle is implanted: the spacing between the grouting nozzles is 1m / 4, and the grouting nozzle is implanted in the hole. The grouting nozzle is inserted into the drilled hole, and the depth should reach the bottom of the hollow layer but not penetrate the structural layer. Use a rubber ring or sealant to seal the connection between the grouting nozzle and the orifice to prevent leakage of the grouting material. Make sure that the sealing material fits the grouting nozzle and the orifice tightly. Gently pull the grouting nozzle by hand to ensure that it is firmly fixed and well sealed. Check whether there are gaps around the orifice to ensure that there is no leakage. Before starting formal grouting, a low-pressure test can be performed to check the installation effect and sealing performance of the grouting nozzle.

[0022] Preferably, in step S4, the part of the concrete floor where the seams have been cut is cleaned, and dust and debris in the seams are removed using tools such as brushes and hair dryers to ensure that the sealing material can be effectively adhered. During the cleaning process, special attention should be paid to the depth and edges of the seams to ensure that there are no residues. For deeper seams, a fine brush and a vacuum cleaner can be used for auxiliary cleaning to ensure thorough cleaning.

[0023] Preferably, in step S5, a low-pressure grouting machine is used to inject the polymer cement-based grouting material into the grouting nozzle to ensure that the hollow area of ​​the floor is filled densely, and the pressure is observed during the grouting process to prevent the floor from warping. The grouting equipment is debugged before grouting to ensure that the working pressure and flow of the equipment are stable. Equipment debugging should include inspection and adjustment of the grouting pump, pipeline and grouting head to ensure that each component works normally. During the debugging process, the fluidity and filling effect of the grouting material should be checked to ensure that the grouting material can be smoothly injected into the hollow area. The grouting material is poured into the hollow area through the grouting hole to ensure that the grouting material is evenly distributed and fills the hollow area. The grouting speed and pressure should be controlled during grouting to avoid the grouting material from being too fast or too slow to affect the filling effect. During the grouting process, the pressure relief hole should be closely monitored to observe the overflow of the grouting material in the surrounding pressure relief holes to judge the hollow filling effect. After the grouting is completed, the orifice should be kept clean to prevent the grouting material from overflowing and contaminating the floor.

[0024] Preferably, in step S6, the parts of the concrete floor that have been sealed are re-cut, and the cut seams are treated with epoxy resin materials to ensure that the cut seam edges are neat and well sealed. Select high-power cutting equipment and equip it with suitable cutting blades. The cutting machine should have high efficiency and stability and be able to cut the floor evenly. The material and specifications of the cutting blade should be selected according to the material and thickness of the floor to ensure the cutting effect.

[0025] Compared with the prior art, the beneficial effects of the present invention are: the present invention improves the traditional hollow grouting method, proposes a method of implanting pins, which increases the bearing capacity of the hollow area of ​​the concrete floor and improves the aesthetic effect of the hollow area of ​​the concrete floor after repair.

[0026] This repair construction process can effectively deal with the phenomenon of hollowing in concrete floors through the key technologies of drilling - pin implantation - grouting nozzle implantation - sealing - grouting - cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 The present invention is a construction process diagram for repairing the hollow area of ​​the concrete floor.

[0028] Description of reference numerals:

[0029] 1-hollow area; 2-pin; 3-grouting nozzle; 4-cutting seam. DETAILED DESCRIPTION

[0030] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0031] like Figure 1 As shown, a repair process for cracks on a basement floor provided by an embodiment of the present invention includes the following steps:

[0032] S1: Drill holes in the hollow area 1 of the floor and clean the dust in the holes;

[0033] S2: Arrange pins 2 in the hollow area of ​​the concrete floor;

[0034] S3: Arrange a grouting nozzle 3 in the hollow area 1 of the concrete floor;

[0035] S4: The concrete floor has been previously cut and sealed, and epoxy cement sealing material is injected into the cut 4;

[0036] S5: Use a low-pressure grouting machine to inject the polymer cement-based grouting material into the grouting nozzle 3 to ensure that the hollow area 1 is filled densely;

[0037] S6: Re-cut the seams in the sealed areas of the concrete floor.

[0038] The details are as follows:

[0039] (1) Drilling

[0040] When drilling pin holes and grouting nozzle holes, use an electric hammer to drill the pin holes and grouting nozzle holes, and ensure that the pin holes are implanted into the structural layer to a depth of not less than 100mm in the building surface layer. The depth of the grouting nozzle hole should reach the bottom of the hollow layer but not penetrate the structural layer.

[0041] (2) Pin implantation

[0042] When implanting the pins, check their firmness after driving them in to ensure that they are tightly bonded to the floor without looseness or tilting. If the pins are higher than the decorative surface, use a punch to gently tap the pin heads. Use anchoring glue to fully adhere and fix the round cap bars of the pin caps to the base surface tightly and reliably. Use a damp cloth to wipe off the excess caulking agent or repair material around the pins to ensure that the surface of the decorative surface is clean and tidy.

[0043] (3) Grouting nozzle implantation

[0044] Place grouting nozzles at the hollows of the surface layer of the plain concrete floor, with a spacing of 1m / 4 grouting nozzles, and implant the grouting nozzles into the holes. Insert the grouting nozzle into the drilled hole, and the depth should reach the bottom of the hollow layer but not penetrate the structural layer. Make sure the grouting nozzle is inserted in place. Use a rubber ring or sealant to seal the connection between the grouting nozzle and the orifice to prevent grouting material from leaking. Make sure the sealing material fits the grouting nozzle and the orifice tightly. Gently pull the grouting nozzle by hand to ensure that it is firmly fixed and well sealed. Check whether there are any gaps around the orifice to ensure that there are no leaks. Before starting the formal grouting, you can perform a low-pressure test to check the installation effect and sealing performance of the grouting nozzle.

[0045] (4) Sealing

[0046] Clean the areas where the concrete floor has been cut, using brushes, hair dryers and other tools to remove dust and debris from the gaps to ensure that the sealing material can adhere effectively. During the cleaning process, special attention should be paid to the depth and edges of the gaps to ensure that there are no residues. For deeper gaps, a fine brush and vacuum cleaner can be used for auxiliary cleaning to ensure thorough cleaning.

[0047] (5) Grouting

[0048] Use a low-pressure grouting machine to inject the polymer cement-based grouting material into the grouting nozzle to ensure that the hollow area of ​​the floor is filled densely. Observe the pressure during the grouting process to prevent the floor from warping. Debug the grouting equipment before grouting to ensure that the working pressure and flow of the equipment are stable. Equipment debugging should include inspection and adjustment of the grouting pump, pipeline and grouting head to ensure the normal operation of each component. During the debugging process, the fluidity and filling effect of the grouting material should be checked to ensure that the grouting material can be smoothly injected into the hollow area. Pour the grouting material into the hollow area through the grouting hole to ensure that the grouting material is evenly distributed and fills the hollow area. The grouting speed and pressure should be controlled during grouting to avoid the grouting material being too fast or too slow to affect the filling effect. During the grouting process, the pressure relief hole should be closely monitored to observe the overflow of the grouting material in the surrounding pressure relief holes to judge the hollow filling effect. After the grouting is completed, the hole mouth should be kept clean to prevent the grouting material from overflowing and contaminating the floor.

[0049] (6) Cutting

[0050] Re-cut the parts of the concrete floor that have been sealed, and use epoxy resin materials to treat the cut seams to ensure that the cut edges are neat and well sealed. Choose high-power cutting equipment and equip it with suitable cutting blades. The cutting machine should have high efficiency and stability to cut the floor evenly. The material and specifications of the cutting blade should be selected according to the material and thickness of the floor to ensure the cutting effect.

[0051] Working principle:

[0052] (1) Drill holes in the hollow area of ​​the floor, drill pin holes and grouting holes respectively, and clean the dust in the holes to ensure that the pins and grouting nozzles are successfully implanted.

[0053] (2) Pins are placed in the hollow areas of the surface layer of the plain concrete floor, with a spacing of 1m per pin. Self-processed "round cap-shaped" stainless steel pins with a nominal diameter of 12mm and a length of 200mm are used. The pins are fully wrapped with anchoring glue and implanted into the holes.

[0054] (3) Grouting nozzles are arranged at the hollow places of the surface layer of the plain concrete floor, with a spacing of 1m / 4. A grouting nozzle with a nominal diameter of 10mm is used and the grouting nozzle is implanted into the hole.

[0055] (4) This repair process can effectively solve the problem of hollowing of concrete floors through the key technologies of drilling - pin implantation - grouting nozzle implantation - sealing - grouting - cutting.

[0056] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit and essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0057] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A repair process for hollow areas of concrete floors, characterized in that: The steps include: S1: Drill holes in the hollow area of ​​the floor and clean the dust in the holes; S2: Place pins in the hollow area of ​​the concrete floor; S3: Arrange grouting nozzles in the hollow area of ​​the concrete floor; S4: The concrete floor has been previously cut and sealed, and epoxy adhesive sealing material is injected into the cut seams; S5: Use a low-pressure grouting machine to inject the polymer cement-based grouting material into the grouting nozzle to ensure that the hollow area is filled densely; S6: Re-cut the seams in the sealed areas of the concrete floor.

2. A repair process for hollow areas of concrete floor as claimed in claim 1, characterized in that: In step S1, when drilling, the pin hole and the grouting nozzle hole are drilled respectively, so that the pin hole is embedded into the building surface layer to a depth of not less than 100 mm in the structural layer, and the depth of the grouting nozzle hole reaches the bottom of the hollow layer without penetrating the structural layer.

3. The repair process for hollow areas of concrete floor as claimed in claim 1, characterized in that: In step S2, after the pin is implanted, it is prevented from protruding from the building surface layer, and is fully fixed with anchoring glue so that the round cap reinforcement of the pin cap is tightly connected to the base surface; the excess caulking agent or repair material around the pin is wiped with a wet cloth to ensure that the surface of the decorative surface layer is clean and tidy.

4. The repair process for hollow areas of concrete floor according to claim 1, characterized in that: In step S3, when the grouting nozzles are implanted, the spacing between the grouting nozzles is 1m / 4, and the grouting nozzles are implanted in the hole to a depth that reaches the bottom of the hollow layer but does not penetrate the structural layer.

5. The repair process for hollow areas of concrete floor as claimed in claim 1, characterized in that: In step S4, the parts of the concrete floor where the seams have been cut are cleaned, and dust and debris in the seams are removed using tools to ensure that the sealing material can be effectively adhered.

6. The repair process for hollow areas of concrete floor as claimed in claim 1, characterized in that: In step S5, a low-pressure grouting method is used to inject polymer cement-based grouting material, and the pressure range is controlled between 0.2MPa-1.5MPa; during the grouting process, the overflow of the grouting material in the surrounding pressure relief holes is judged to judge the hollow filling effect; after the grouting is completed, the hole mouth is kept clean.

7. The repair process for the hollow area of ​​the ground according to claim 1, characterized in that: In step S6, the slit is treated with a sealing material to ensure that the slit edges are neat and well sealed; the sealing material is evenly applied or injected into the slit using a scraper or syringe to ensure that the gap is completely filled; after the sealing is completed, wait for the material to solidify, and the curing time is 24 hours; after the material is completely solidified, check the sealing effect.

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