CN113738152A - Leakage maintenance construction method for water-return beam - Google Patents
Leakage maintenance construction method for water-return beam Download PDFInfo
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- CN113738152A CN113738152A CN202111106754.1A CN202111106754A CN113738152A CN 113738152 A CN113738152 A CN 113738152A CN 202111106754 A CN202111106754 A CN 202111106754A CN 113738152 A CN113738152 A CN 113738152A
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- 238000010276 construction Methods 0.000 title claims abstract description 30
- 238000012423 maintenance Methods 0.000 title description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 66
- 238000005553 drilling Methods 0.000 claims abstract description 39
- 238000004140 cleaning Methods 0.000 claims abstract description 14
- 238000012795 verification Methods 0.000 claims abstract description 7
- 238000011835 investigation Methods 0.000 claims abstract description 3
- 239000000463 material Substances 0.000 claims description 40
- 239000004568 cement Substances 0.000 claims description 19
- 239000004593 Epoxy Substances 0.000 claims description 15
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 13
- 239000011248 coating agent Substances 0.000 claims description 13
- 238000000576 coating method Methods 0.000 claims description 13
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 8
- 238000004078 waterproofing Methods 0.000 claims description 8
- 239000011440 grout Substances 0.000 claims description 7
- 230000008439 repair process Effects 0.000 claims description 7
- 238000005520 cutting process Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 4
- 230000001680 brushing effect Effects 0.000 claims description 3
- 229920001971 elastomer Polymers 0.000 claims description 3
- 238000011049 filling Methods 0.000 claims description 3
- 238000002156 mixing Methods 0.000 claims description 3
- 239000004570 mortar (masonry) Substances 0.000 claims description 3
- 238000005498 polishing Methods 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 238000007790 scraping Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims description 3
- 238000005406 washing Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 15
- 239000004567 concrete Substances 0.000 description 18
- 238000000034 method Methods 0.000 description 11
- 239000003822 epoxy resin Substances 0.000 description 5
- 229920000647 polyepoxide Polymers 0.000 description 5
- 239000000428 dust Substances 0.000 description 3
- 239000004033 plastic Substances 0.000 description 3
- 229920003023 plastic Polymers 0.000 description 3
- 239000004927 clay Substances 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000002425 crystallisation Methods 0.000 description 2
- 230000008025 crystallization Effects 0.000 description 2
- 239000003921 oil Substances 0.000 description 2
- 239000003973 paint Substances 0.000 description 2
- 230000035515 penetration Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- CERQOIWHTDAKMF-UHFFFAOYSA-M Methacrylate Chemical compound CC(=C)C([O-])=O CERQOIWHTDAKMF-UHFFFAOYSA-M 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000010426 asphalt Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009435 building construction Methods 0.000 description 1
- 229920005549 butyl rubber Polymers 0.000 description 1
- 238000006757 chemical reactions by type Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 229920006333 epoxy cement Polymers 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 230000010220 ion permeability Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003607 modifier Substances 0.000 description 1
- 239000005543 nano-size silicon particle Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011433 polymer cement mortar Substances 0.000 description 1
- 229920002635 polyurethane Polymers 0.000 description 1
- 239000004814 polyurethane Substances 0.000 description 1
- 229920000915 polyvinyl chloride Polymers 0.000 description 1
- 239000004800 polyvinyl chloride Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
- E04G23/0211—Arrangements for filling cracks or cavities in building constructions using injection
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention discloses a construction method for maintaining leakage of a water-resisting beam, which comprises the following steps: s1, performing site cleaning and investigation, S2, drilling a grouting hole, S3, grouting, and S4, closing up the surface; s2 includes: s21, determining hole positions: selecting hole sites along two sides of the crack in a crossed manner, enabling the distance between the hole sites to be 2-3cm away from the crack, and enabling the distance between every two adjacent hole sites on the same side of the crack to be 25-50 cm; s22, drilling: drilling selected hole sites in sequence, wherein during drilling, a drill hole needs to penetrate through a crack but a structural plate cannot be penetrated, and the drilling angle is not more than 85 degrees; s23, burying a mouth: installing a water stopping needle head in the grouting hole, and screwing the water stopping needle head tightly to ensure that no gap exists between the outer wall of the water stopping needle head and the hole wall; s24, hole site verification: injecting clean water into the water stopping needle head, and observing whether the clean water can overflow from the adjacent holes; if the overflow can be realized, the next operation is carried out, and if the overflow cannot be realized, the hole needs to be checked. The invention can effectively solve the leakage problem of the crack of the water-resisting beam, improves the waterproof effect of the water-resisting beam and has good durability.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a construction method for maintaining leakage of a water-resisting beam.
Background
The current treatment methods for the leakage maintenance of the reverse water beam mainly comprise the following steps: 1. the surface repairing method is characterized in that cement paste and epoxy cement are coated on the surface of a leakage crack or anticorrosive materials such as paint, asphalt and the like are coated on the surface of concrete, and measures such as glass fiber cloth and the like are usually adhered on the surface of the crack in order to prevent the concrete from continuously cracking under the influence of external force while protecting; 2. the grouting method is characterized in that cementing materials are pressed into cracks of concrete by utilizing pressure equipment, and the cementing materials and the concrete form a whole after being hardened, so that the aim of plugging and reinforcing is fulfilled, wherein the commonly used cementing materials comprise cement paste, epoxy resin, methacrylate, polyurethane and other chemical materials; 3. the caulking method is that a groove is usually chiseled along a crack, and a plastic or rigid water stop material is embedded in the groove to achieve the purpose of sealing the crack, wherein the common plastic material comprises polyvinyl chloride cement, plastic factice, butyl rubber and the like, and the common rigid water stop material is polymer cement mortar and the like; wherein, the surface repairing method and the caulking plugging method only plug the surface of the concrete, but the leaked water molecules can still corrode the concrete and the internal reinforcing steel bar structure thereof; the grouting method is limited by the construction technology and the selection of grouting materials, has poor waterproof effect and is easy to have the phenomenon of repeated leakage.
Disclosure of Invention
In order to overcome the defects, the invention aims to provide a construction method for maintaining leakage of a water-reversing beam, which can effectively solve the leakage problem of cracks of the water-reversing beam, improve the waterproof effect of the water-reversing beam and has good durability.
In order to achieve the above purposes, the invention adopts the technical scheme that: a construction method for maintaining leakage of a water-resisting beam is characterized by comprising the following steps: s1, performing site cleaning and investigation, S2, drilling a grouting hole, S3, grouting, and S4, closing up the surface; wherein S2 includes:
s21, determining hole positions: selecting hole sites along two sides of the crack in a crossed manner, enabling the distance between the hole sites to be 2-3cm away from the crack, and enabling the distance between every two adjacent hole sites on the same side of the crack to be 25-50 cm;
s22, drilling: drilling the selected hole sites in sequence by using a drilling tool, wherein during drilling, a drill hole needs to penetrate through the crack but the structural plate cannot be drilled through, and the drilling angle is not more than 85 degrees;
s23, burying a mouth: installing a water stopping needle head in the drilled grouting hole, wherein the rear part of the water stopping needle head is provided with expanded rubber and is screwed tightly in the grouting hole by using a special inner hexagonal wrench, so that no gap exists between the outer wall of the water stopping needle head and the hole wall, and the water does not leak;
s24, hole site verification: injecting clean water into the water stopping needle head by adopting a high-pressure grouting machine, and observing whether the clean water can overflow from adjacent holes; if the overflow can be realized, the next operation is carried out, and if the overflow cannot be realized, the hole needs to be checked.
Further, in S22, 1/2 of the structural plate thickness is not less than 1/2 of the drilling depth is not less than 2/3 of the structural plate thickness. In actual operation, if the drilling depth is too deep, the original waterproof layer is damaged; if the depth of the drilling hole is too shallow, the grouting hole cannot penetrate through the crack, grouting liquid does not enter the crack, and the grouting and water stopping effects cannot be achieved; the drilling depth is between 1/2 and 2/3 of the thickness of the structural plate, so that the original waterproof layer is not damaged, grouting materials can fully enter capillary cavities at the tail ends of cracks to the maximum extent, and the grouting effect is improved.
Further, S1 includes cleaning the surface of the structural slab, confirming the water seepage position of the crack, and distinguishing the crack type, wherein the crack type includes construction cold crack and structural crack. By distinguishing the crack types, the matched maintenance method can be adopted according to the reasons of crack generation, so that the maintenance effect is convenient to improve.
Further, S3 includes grouting the construction cold joint, and grouting the structural crack. Wherein, the construction cold joint is filled with a water-based capillary crystalline waterproofing agent and an acrylate grouting material, and the structural crack is filled with an epoxy grouting material.
For construction cold joints, the water-based capillary crystalline waterproofing agent can enter deeper parts of the cracks in a penetration mode, so that the problem that conventional grouting liquid with smaller diameter cannot reach the deeper parts of the cracks to cause water seepage easily at the deeper parts of the cracks is solved, and the waterproof performance at the deeper parts of the cracks is improved; and the acrylate grouting material has high viscosity and stable condensation effect in water, can be polymerized in cracks to form gel to block a leakage channel, can keep a gel state in water for a long time, can expand for the second time when meeting water, and cannot shrink after water loss, so that the plugging and waterproof effects are improved, and the waterproof duration is prolonged. The structural cracks need to be reinforced, and the epoxy grouting material takes epoxy resin as a main body, and has strong bonding force, small shrinkage and good stability after the epoxy resin is hardened, so that the structural firmness of the structural slab can be enhanced while leakage repairing is carried out, and the leakage resistance of the structural slab is improved.
Further, grouting the construction cold joint comprises: sequentially injecting the water-based capillary crystalline waterproofing agent into the grouting holes along one end of the crack in a low-pressure slow pouring mode, wherein the grouting time is not less than 30 seconds, and curing for 2-3 days in a dry environment after grouting is finished; sequentially injecting the acrylate grouting material into the grouting holes along one end of the crack in a low-pressure slow-grouting mode for not less than 30 seconds; after 5 minutes, carrying out the slurry supplement of the acrylate grouting material again; and after finishing the grout filling, removing the exposed water stopping needle head, and cleaning the grout overflowing to the surface of the structural slab.
Further, grouting the structural fractures comprises: cutting along the 1cm positions on the two sides of the crack, wherein the cutting depth is 1-2cm, mixing epoxy grouting material and cement into a cement paste shape, and scraping the cement paste into a cut groove by using a scraper so as to plug the surface of the crack of the structure; sequentially injecting epoxy grouting materials into the grouting holes along one end of the crack in a low-pressure slow grouting mode, wherein the grouting time is not less than 30 seconds, and the grouting time is kept for 30 minutes after the grouting is finished; and removing the exposed water-stopping needle head, and cleaning grouting liquid overflowing to the surface of the structural plate.
Further, S4 includes: plugging the grouting hole by adopting quick-setting mortar; polishing and roughening the surface of the structural plate, and washing the structural plate by using clear water; and uniformly brushing the cement-based permeable crystalline waterproof coating on the surface of the structural slab along the crack. The waterproof performance of the structural slab is further improved by coating the cement-based capillary crystalline waterproof coating on the surface of the structural slab, the cement-based capillary crystalline waterproof coating is similar to components of concrete and has better compatibility, and the coating is coated on the surface of the structural slab and can react with the concrete on the surface of the structural slab to be fully bonded together, so that the problem of peeling off and peeling of the coating caused by external severe conditions is avoided.
The invention has the beneficial effects that: in S2, grouting liquid can be poured into the crack to the maximum extent on the basis of not damaging the original waterproof layer through the operations of hole site determination, drilling, nozzle burying and hole site verification, and the hole taking angle is set to be not more than 85 degrees, so that the grouting hole can be ensured to penetrate through the crack, and the problem that the crack cannot be penetrated by the drilling hole due to the fact that the drilling hole is parallel to the crack is solved; whether hole taking is correct or not can be checked through hole site verification so as to ensure normal proceeding of subsequent grouting, and dust in cracks can be cleaned through pouring clean water; in S3, the crack can be maintained pertinently better by adopting different grouting materials for different crack types, the waterproof effect after maintenance is improved, and the phenomenon of repeated leakage is reduced.
Detailed Description
The following detailed description of the preferred embodiments of the present invention is provided to enable those skilled in the art to more readily understand the advantages and features of the present invention, and to clearly and unequivocally define the scope of the present invention.
Examples
The invention discloses a construction method for maintaining leakage of a water-resisting beam, which is characterized by comprising the following steps of: s1, site cleaning and surveying, S2, drilling a grouting hole, S3, grouting, S4 and surface closing. The method specifically comprises the following steps:
s1, field cleaning and surveying: cleaning the surface of the structural plate to remove scum, dust and oil stains on the surface of the structural plate so as to keep the surface clean and oil stain-free; then confirming the water seepage position of the crack, and distinguishing the crack type;
the crack types comprise construction cold cracks and structural cracks. The construction cold seam refers to a weak surface formed in a concrete structure because the concrete pouring is interrupted due to unexpected factors in the concrete pouring process, and the interval time exceeds the initial setting time of the concrete but is less than the final setting time of the concrete. Structural cracks are cracks caused by structural problems of the structure itself. The crack type can be different in subsequent repair operations.
S2, drilling a grouting hole, comprising: s21, determining hole positions, S22, drilling, S23, burying a nozzle, and S24, verifying the hole positions;
s21, determining hole positions: selecting hole sites along two sides of the crack in a crossed manner, and enabling the hole sites to be uniformly distributed, wherein the distance between the hole sites and the crack is 2-3cm, and the distance between every two adjacent hole sites on the same side of the crack is 25-50 cm; during actual operation, the hole position and the hole spacing are determined according to actual conditions on site, if the crack is small, the hole spacing can be properly increased, and if the crack is large, the hole spacing can be properly reduced;
s22, drilling: drilling the selected hole sites by using a drilling tool in sequence, wherein during drilling, a drill hole needs to penetrate through the crack but cannot penetrate through the structural plate, the drilling depth is not less than 1/2 of the thickness of the structural plate and not more than 2/3 of the thickness of the structural plate, and the drilling angle is not more than 85 degrees; in actual operation, if the drilling depth is too deep, the original waterproof layer is damaged; if the depth of the drilling hole is too shallow, the grouting hole cannot penetrate through the crack, grouting liquid does not enter the crack, and the grouting and water stopping effects cannot be achieved; the drilling depth is between 1/2 and 2/3 of the thickness of the structural plate, so that the original waterproof layer is not damaged, grouting materials can fully enter capillary cavities at the tail ends of cracks to the maximum extent, and the grouting effect is improved; and will get the hole angle and set up to be not more than 85 and can guarantee that the grout hole runs through to the crack in, prevent that drilling and crack are parallel to lead to the problem that drilling can not run through the crack to appear.
S23, burying a mouth: installing a water stopping needle head in the drilled grouting hole, wherein the rear part of the water stopping needle head is provided with expanded rubber and is screwed tightly in the grouting hole by using a special inner hexagonal wrench, so that no gap exists between the outer wall of the water stopping needle head and the hole wall, and the water does not leak;
s24, hole site verification: injecting clean water into the water stopping needle head at high pressure by using a high-pressure grouting machine, and observing whether the clean water can overflow from adjacent holes; if the overflow can be realized, the next operation is carried out, and if the overflow cannot be realized, the hole needs to be checked. Whether the hole is right or not can be checked through hole site verification, whether the hole is communicated with the hole or not is judged, continuous through during follow-up grouting is guaranteed, and dust in the crack can be cleaned through pouring clean water.
S3, grouting: the method comprises the steps of grouting construction cold joints and grouting structural cracks. Wherein, the construction cold joint is filled with a water-based capillary crystalline waterproofing agent and an acrylate grouting material, and the structural crack is filled with an epoxy grouting material.
For construction cold joints, the water-based capillary crystalline waterproofing agent can enter deeper parts of the cracks in a penetration mode, so that the problem that conventional grouting liquid with smaller diameter cannot reach the deeper parts of the cracks to cause water seepage easily at the deeper parts of the cracks is solved, and the waterproof performance at the deeper parts of the cracks is improved; and the acrylate grouting material has high viscosity and stable condensation effect in water, can be polymerized in cracks to form gel to block a leakage channel, can keep a gel state in water for a long time, can expand for the second time when meeting water, and cannot shrink after water loss, so that the plugging and waterproof effects are improved, and the waterproof duration is prolonged. The structural cracks need to be reinforced, and the epoxy grouting material takes epoxy resin as a main body, and has strong bonding force, small shrinkage and good stability after the epoxy resin is hardened, so that the structural firmness of the structural slab can be enhanced while leakage repairing is carried out, and the leakage resistance of the structural slab is improved.
Specifically, grouting the construction cold joint comprises: sequentially injecting the water-based capillary crystalline waterproofing agent into the grouting holes along one end of the crack in a low-pressure slow pouring mode, wherein the grouting time is not less than 30 seconds, and curing for 2-3 days in a dry environment after grouting is finished; sequentially injecting the acrylate grouting material into the grouting holes along one end of the crack in a low-pressure slow-grouting mode for not less than 30 seconds; after 5 minutes, carrying out the slurry supplement of the acrylate grouting material again; and after finishing the grout filling, removing the exposed water stopping needle head, and cleaning the grout overflowing to the surface of the structural slab.
Grouting the structural fractures includes: cutting along the 1cm positions on the two sides of the crack, wherein the cutting depth is 1-2cm, mixing epoxy grouting material and cement into a cement paste shape, and scraping the cement paste into a cut groove by using a scraper so as to plug the surface of the crack of the structure; sequentially injecting epoxy grouting materials into the grouting holes along one end of the crack in a low-pressure slow grouting mode, wherein the grouting time is not less than 30 seconds, and the grouting time is kept for 30 minutes after the grouting is finished; and removing the exposed water-stopping needle head, and cleaning grouting liquid overflowing to the surface of the structural plate.
In the embodiment, the acrylate slurry adopts a Jiagushi ZJ-1 type acrylate grouting plugging material, the water-based permeable crystallization type waterproof coating adopts a Jiagushi SK series nano silicon ion permeability modifier, the epoxy grouting material adopts a Jiagushi HG series epoxy grouting material, and the cement-based permeable crystallization type polymer waterproof coating adopts a Jiagushi PS-1 high-strength permeable reaction type repairing special material.
S4, the surface closing-in comprises: plugging the grouting hole by adopting quick-setting mortar; polishing and roughening the surface of the structural plate, and washing the structural plate by using clear water; and uniformly brushing the cement-based permeable crystalline waterproof coating on the surface of the structural slab along the crack.
Traditional surface binding off adopts the epoxy clay material more, nevertheless because epoxy clay and concrete are the material of two kinds of properties, the time passes thereupon, its bonding effect with the concrete can reduce, easily the concrete surface drops, lead to the surface seal effect inefficacy, and the cement base infiltration crystalline form waterproof coating that this embodiment adopted, similar with the concrete composition, better compatibility has, and this coating is applied paint on the structural slab surface with a brush, can react with the concrete on structural slab surface with abundant bonding together, avoid the problem of the peeling that this coating leads to because of outside adverse circumstances, further improve the waterproof performance of structural slab.
The above embodiments are merely illustrative of the technical concept and features of the present invention, and the present invention is not limited thereto, and any equivalent changes or modifications made according to the spirit of the present invention should be included in the scope of the present invention.
Claims (7)
1. A construction method for maintaining leakage of a water-resisting beam is characterized by comprising the following steps: s1, performing site cleaning and investigation, S2, drilling a grouting hole, S3, grouting, and S4, closing up the surface; wherein S2 includes:
s21, determining hole positions: selecting hole sites along two sides of the crack in a crossed manner, enabling the distance between the hole sites to be 2-3cm away from the crack, and enabling the distance between every two adjacent hole sites on the same side of the crack to be 25-50 cm;
s22, drilling: drilling the selected hole sites in sequence by using a drilling tool, wherein during drilling, a drill hole needs to penetrate through the crack but the structural plate cannot be drilled through, and the drilling angle is not more than 85 degrees;
s23, burying a mouth: installing a water stopping needle head in the drilled grouting hole, wherein the rear part of the water stopping needle head is provided with expanded rubber and is screwed tightly in the grouting hole by using a special inner hexagonal wrench, so that no gap exists between the outer wall of the water stopping needle head and the hole wall, and the water does not leak;
s24, hole site verification: injecting clean water into the water stopping needle head by adopting a high-pressure grouting machine, and observing whether the clean water can overflow from adjacent holes; if the overflow can be realized, the next operation is carried out, and if the overflow cannot be realized, the hole needs to be checked.
2. The reversed water beam leakage repair construction method according to claim 1, wherein in S22, 1/2 of the thickness of the structural plate is less than or equal to the drilling depth is less than or equal to 2/3 of the thickness of the structural plate.
3. The inverted beam leakage repair construction method according to claim 2, wherein S1 comprises cleaning the surface of the structural slab, confirming the water seepage position of the crack, and distinguishing the crack type, wherein the crack type comprises construction cold crack and structural crack.
4. The inverted beam leakage repair construction method according to claim 3, wherein S3 includes grouting construction cold joints, grouting structural cracks; wherein, the construction cold joint is filled with a water-based capillary crystalline waterproofing agent and an acrylate grouting material, and the structural crack is filled with an epoxy grouting material.
5. The inverted water beam leakage repair construction method according to claim 4, wherein grouting the construction cold joint comprises: sequentially injecting the water-based capillary crystalline waterproofing agent into the grouting holes along one end of the crack in a low-pressure slow pouring mode, wherein the grouting time is not less than 30 seconds, and curing for 2-3 days in a dry environment after grouting is finished; sequentially injecting the acrylate grouting material into the grouting holes along one end of the crack in a low-pressure slow-grouting mode for not less than 30 seconds; after 5 minutes, carrying out the slurry supplement of the acrylate grouting material again; and after finishing the grout filling, removing the exposed water stopping needle head, and cleaning the grout overflowing to the surface of the structural slab.
6. The inverted beam leakage repair construction method according to claim 4, wherein grouting the structural cracks comprises: cutting along the 1cm positions on the two sides of the crack, wherein the cutting depth is 1-2cm, mixing epoxy grouting material and cement into a cement paste shape, and scraping the cement paste into a cut groove by using a scraper so as to plug the surface of the crack of the structure; sequentially injecting epoxy grouting materials into the grouting holes along one end of the crack in a low-pressure slow grouting mode, wherein the grouting time is not less than 30 seconds, and the grouting time is kept for 30 minutes after the grouting is finished; and removing the exposed water-stopping needle head, and cleaning grouting liquid overflowing to the surface of the structural plate.
7. The reversed water beam leakage repair construction method according to any one of claims 1 to 6, wherein S4 includes: plugging the grouting hole by adopting quick-setting mortar; polishing and roughening the surface of the structural plate, and washing the structural plate by using clear water; and uniformly brushing the cement-based permeable crystalline waterproof coating on the surface of the structural slab along the crack.
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| CN202111106754.1A CN113738152A (en) | 2021-09-22 | 2021-09-22 | Leakage maintenance construction method for water-return beam |
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| CN202111106754.1A CN113738152A (en) | 2021-09-22 | 2021-09-22 | Leakage maintenance construction method for water-return beam |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115467550A (en) * | 2022-09-14 | 2022-12-13 | 武汉二航路桥特种工程有限责任公司 | Concrete crack repairing method |
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