CN111794551B - Strong-vibration ramp masonry wall crack prevention and treatment method - Google Patents
Strong-vibration ramp masonry wall crack prevention and treatment method Download PDFInfo
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- CN111794551B CN111794551B CN202010659302.5A CN202010659302A CN111794551B CN 111794551 B CN111794551 B CN 111794551B CN 202010659302 A CN202010659302 A CN 202010659302A CN 111794551 B CN111794551 B CN 111794551B
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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
- E04G23/0218—Increasing or restoring the load-bearing capacity of building construction elements
- E04G23/0222—Replacing or adding wall ties
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Abstract
The invention relates to the technical field of wall crack repair, and discloses a strong-vibration ramp masonry wall crack prevention and treatment method, which comprises the following steps: the method comprises the steps of construction preparation, crack marking, base layer treatment, steel nail injection, crack surface cleaning, crack sealing, steel nail opposite-pull fastening, steel nail pre-embedding, carbon fiber net hanging, surface roughening, plastering and putty powder paint recovery.
Description
Technical Field
The invention relates to the technical field of wall crack repair, in particular to a strong vibration ramp masonry wall crack prevention and treatment method.
Background
With the rapid development of the economy of China, more and more large commercial complexes appear, especially in economically developed areas. As a lot of large-scale machines and construction vehicles pass through the garage ramp during construction, the passing frequency is high, the load is large, and strong vibration can damage the wall built on the two sides of the ramp, so that the wall is cracked. The existing repair technology for wall cracks is mainly used for repairing after chiseling, glass fiber net is hung, plastering is carried out, the structural stability of the wall formed by the repair technology is still poor, the repaired wall can still continuously crack under strong vibration, and the problems of cost increase, construction period extension and the like caused by repeated repair are solved. Therefore, it is necessary to provide a new control method.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a method for preventing and treating cracks of a masonry wall of a strong-vibration ramp.
In order to solve the technical problem, the invention is realized by the following scheme: a method for preventing cracks of masonry walls of strong-vibration ramps comprises the following steps:
(1) construction preparation: the color strip cloth and the waste template are paved on the ground, so that the mortar pieces removed and beaten are prevented from damaging the ground of the ramp;
(2) and (3) crack marking: checking the length, width, depth and trend of the crack, and marking the cutting position of the crack;
(3) base layer treatment: cutting all the plastering surface layers within 100mm of the two sides of the crack according to the marking and scribing range, chiseling the joints by using an electric hammer, chiseling masonry bodies on the two sides of the crack to form a wedge-shaped groove, and performing width cutting treatment on the crack;
(4) steel nail injection: uniformly injecting steel nails into the wedge-shaped grooves on the two sides along the length direction of the gap, and ensuring that the steel nails are injected on the masonry main body;
(5) cleaning the surface of the crack: removing dust and residues on the surfaces of the cracks by using a blower, and drying moisture at the positions of the cracks;
(6) sealing the crack: one person uses high-pressure rare gas to aim at the gap and slowly moves along the length direction, the other person injects structural adhesive along the injection direction of the high-pressure rare gas, and the actions of the two persons are ensured to be continuous until the crack is completely sealed by the structural adhesive;
(7) and (3) oppositely pulling and fastening the steel nails: the steel nails on the two sides are mutually tensioned and fastened by using a powerful drawing wire, so that the interval of the crack tends to be inwards reduced;
(8) pre-burying of steel nails: filling wedge-shaped grooves on two sides of the crack with mortar to ensure that the steel nail is buried;
(9) hanging a carbon fiber net: cutting the fiber net according to the size of chiseling the width of the plastering surface layer, coating SKO mosaic carbon fiber impregnating adhesive on one surface of the carbon fiber net, then pasting the surface coated with the SKO mosaic carbon fiber impregnating adhesive in a foundation pit, and repeatedly rolling the surface of the carbon fiber net along the crack direction by using a special smooth roller until the sizing material seeps out of the surface of the carbon fiber net so as to remove air bubbles and enable the sizing material to fully infiltrate the carbon fiber net;
(10) surface roughening: slurry throwing treatment is carried out on the foundation pit by adopting cement slurry, slurry throwing ensures uniformity, no dead angle and burr pulling-out, slurry throwing burrs protrude 0.8-1 cm, and maintenance is carried out after the slurry reaches certain strength;
(11) plastering: cleaning a base layer and fully wetting the base layer with water before plastering, ensuring layered plastering when plastering, wherein the thickness of each layer is 8-15 mm, and plastering and finishing can be carried out when six or seven layers of bottom ash are dry;
(12) recovering the putty powder and the paint: the surface of the wall body is recovered by using the putty powder and the paint, and the color of the wall body is consistent with that of the surrounding wall surface.
Further, in the step 3, the gradient of the wedge-shaped groove is 30-45 degrees, and the depth is 60-100 mm; the width of the slit is 20-30 mm, and the depth is not less than 50 mm.
Further, in the step 4, the steel nail is injected in the wedge-shaped groove at the middle position along the width direction of the wedge-shaped groove, and the height of the steel nail is not more than 30 mm.
Further, in the step 6, the rare gas injection and the knot formation glue injection are both performed from the upper end to the lower end of the crack, and the time interval between the rare gas injection and the knot formation glue injection at the same position is not more than 10 s.
Further, in the step 6, the structural adhesive is neutral silicone weather-resistant adhesive, an extrusion adhesive gun is used for injecting and forming the structural adhesive, the diameter of a gun nozzle is smaller than the width of the crack, the gun nozzle moves uniformly and slowly, and the crack is ensured to be filled with the sealing structural adhesive.
Further, in the step 10, the cement slurry is prepared by mixing the following components in percentage by weight: sand = 1: 0.66, wherein the self-boiling glue is prepared according to the following ratio: water = 1: 16 are arranged in proportion.
Compared with the prior art, the invention has the beneficial effects that: the control method provided by the invention has the advantages that the integrity and the structural strength of the wall body are improved through the combined action of three modes of injecting knot structural adhesive into cracks, oppositely pulling and fastening steel nails and hanging a carbon fiber net, the capacity of resisting deformation is improved, the influence of vibration on the cracking of the wall body is greatly reduced, the structural adhesive is sealed in a rare gas protection mode during injecting knot structural adhesive, the influence on the strength of the structural adhesive caused by air bubbles generated in the structural adhesive is effectively prevented, the deformation resistance is enhanced, the secondary cracks are avoided after the cracks are treated by the control method, the quality and the impression are effectively guaranteed, and the problems of cost increase, construction period extension and the like caused by repeated repair are solved.
Drawings
FIG. 1 is a flowchart of the steps of the method for preventing cracks in masonry walls of strong vibration ramps according to the present invention;
FIG. 2 is a schematic view of a masonry wall crack control structure of the present invention;
in the drawings: 1. masonry, 2, cracks, 3, structural adhesive, 4, steel nails, 5, strong wire drawing, 6, common cement mortar, 7, a carbon fiber net, 8, cement paste, 9 and a plastering layer.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the advantages and features of the invention can be more readily understood by those skilled in the art, and the scope of the invention will be more clearly and clearly defined.
Referring to the attached drawings 1-2, the method for preventing and treating the crack of the masonry wall of the strong vibration ramp comprises the following steps:
(1) construction preparation: the color strip cloth and the waste template are paved on the ground, so that the mortar pieces removed and beaten are prevented from damaging the ground of the ramp;
(2) and (3) crack marking: checking the length, width, depth and trend of the crack, marking the cutting position of the crack, wherein the cutting range is square and straight, so that later construction is facilitated, and the construction is attractive;
(3) base layer treatment: cutting all the plastering surface layers within 100mm of the two sides of the crack according to the marked marking range, chiseling by using a hammer, chiseling masonry bodies on the two sides of the crack to form a wedge-shaped groove, and finally performing width cutting treatment on the crack, wherein the gradient of the wedge-shaped groove is 30 degrees, and the depth of the wedge-shaped groove is 60 mm; the width of the crack is 20mm, and the depth is 50 mm;
(4) steel nail injection: uniformly injecting steel nails into the wedge-shaped grooves on the two sides along the length direction of the gap, ensuring that the steel nails are injected on the masonry main body, injecting the steel nails into the wedge-shaped grooves at the middle position along the width direction of the wedge-shaped grooves, and ensuring that the height of the steel nails is 30 mm;
(5) cleaning the surface of the crack: removing dust and residues on the surfaces of the cracks by using a blower, blowing water at the positions of the cracks, and ensuring the cracks to be dry during construction;
(6) sealing the crack: one person uses high-pressure rare gas to aim at the gap and slowly move along the length direction, the other person injects structural adhesive along the injection direction of the high-pressure rare gas, the actions of the two persons are ensured to be continuous until the gap is completely sealed by the structural adhesive, trimming is immediately carried out after the injection of the structural adhesive is finished, the structural adhesive which is excessive outside the gap is pressed into the gap by a scraper, the surface of the gap is sequentially scraped to be flat, and the adhesive is in contact with the side edge of the gap;
(7) and (3) oppositely pulling and fastening the steel nails: after the structural adhesive is air-dried, steel nails on two sides are mutually tensioned and fastened by using a powerful wire drawing, so that the interval of cracks tends to be inwardly reduced;
(8) pre-burying of steel nails: filling wedge-shaped grooves on two sides of the crack with common cement mortar to ensure that the steel nails are buried in the cement mortar, standing for 3 hours, and then performing the next step;
(9) hanging a carbon fiber net: cutting the fiber net according to the size of chiseling the width of the plastering surface layer, coating SKO mosaic carbon fiber impregnating adhesive on one surface of the carbon fiber net, then pasting the surface coated with the SKO mosaic carbon fiber impregnating adhesive in a foundation pit, and repeatedly rolling the surface of the carbon fiber net along the crack direction by using a special smooth roller until the sizing material seeps out of the surface of the carbon fiber net so as to remove air bubbles and enable the sizing material to fully infiltrate the carbon fiber net;
(10) surface roughening: firstly, according to the weight ratio of polyvinyl alcohol: water = 1: 16, preparing self-boiling glue water according to the proportion: sand = 1: cement paste is prepared according to the proportion of 0.66, and finally the cement paste is adopted to carry out slurry throwing treatment on the foundation pit, the slurry throwing ensures uniformity, no dead angle and burr pulling-out, the slurry throwing burr protrudes by 0.8-1 cm, the maintenance is carried out after the slurry reaches certain strength, the maintenance is carried out for 3 days, and the burr is ensured not to be whitened in the period; if whitening occurs, the blank is required to be removed and napped again;
(11) plastering: cleaning a base layer and fully wetting the base layer with water before plastering, ensuring layered plastering when plastering, wherein the thickness of each layer is 8-15 mm, spraying water to wet the previous layer when the next layer is plastered, and plastering and collecting the surface when the bottom ash is dried by six or seven;
(12) recovering the putty powder and the paint: the surface of the wall body is restored by using the putty powder and the paint, so that the color of the restored wall body surface is consistent with that of the surrounding wall surface.
In the step 6, injecting the rare gas and injecting the structural adhesive from the upper end to the lower end of the crack, wherein the time interval between injecting the rare gas and injecting the structural adhesive at the same position is not more than 10s, so that the structural adhesive can be effectively protected by the rare gas, the influence of air bubbles on the structural adhesive strength during injecting the structural adhesive is prevented, and the deformation resistance of the structural adhesive is enhanced; in the preferred embodiment, the structural adhesive is neutral silicone weather-resistant adhesive, the structural adhesive is injected and bonded by an extrusion adhesive gun, the diameter of the gun nozzle is smaller than the width of the crack, so that the gun nozzle can extend into the half depth of the crack, the gun nozzle moves uniformly and slowly, the crack is ensured to be filled with the sealing structural adhesive, and bubbles or cavities caused by too fast movement of the gun nozzle are prevented.
The prevention structure shown in figure 2 is formed by the prevention method, wherein the mark 1 is masonry, the mark 2 is crack, the mark 3 is structural adhesive, the mark 4 is steel nail, the mark 5 is strong drawn wire, the mark 6 is common cement mortar, the mark 7 is carbon fiber net, the mark 8 is cement mortar, and the mark 9 is a plastering layer.
The prevention method of the invention improves the integrity and the structural strength of the wall body by injecting structural adhesive into the cracks, fastening the steel nails in a counter-pulling way and hanging the inner layer and the outer layer of the carbon fiber net, the internal and the surface of the cracked masonry are integrally reinforced, the integrity and the structural strength of the crack are ensured, the deformation is uniformly dispersed on the whole wall surface, the capability of resisting the deformation together is increased, the influence of the vibration on the cracking of the wall body is greatly reduced, and the structural adhesive is sealed in a rare gas protection mode when the structural adhesive is injected, so that the influence on the strength of the structural adhesive caused by air bubbles generated in the structural adhesive is effectively prevented, the deformation resistance of the foundation is enhanced, the prevention and treatment method can prevent secondary cracks after the cracks are treated, effectively ensures the quality and the impression, and avoids the problems of cost increase, construction period extension and the like caused by repeated repair.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A strong vibration ramp masonry wall crack prevention and treatment method is characterized by comprising the following steps:
(1) construction preparation: the color strip cloth and the waste template are paved on the ground, so that the mortar pieces removed and beaten are prevented from damaging the ground of the ramp;
(2) and (3) crack marking: checking the length, width, depth and trend of the crack, and marking the cutting position of the crack;
(3) base layer treatment: cutting all the plastering surface layers within 100mm of the two sides of the crack according to the marking and scribing range, chiseling the joints by using an electric hammer, chiseling masonry bodies on the two sides of the crack to form a wedge-shaped groove, and performing width cutting treatment on the crack;
(4) steel nail injection: uniformly injecting steel nails into the wedge-shaped grooves on the two sides along the length direction of the gap, and ensuring that the steel nails are injected on the masonry main body;
(5) cleaning the surface of the crack: removing dust and residues on the surfaces of the cracks by using a blower, and drying moisture at the positions of the cracks;
(6) sealing the crack: one person uses high-pressure rare gas to aim at the gap and slowly moves along the length direction, the other person injects structural adhesive along the injection direction of the high-pressure rare gas, and the actions of the two persons are ensured to be continuous until the crack is completely sealed by the structural adhesive;
(7) and (3) oppositely pulling and fastening the steel nails: the steel nails on the two sides are mutually tensioned and fastened by using a powerful drawing wire, so that the interval of the crack tends to be inwards reduced;
(8) pre-burying of steel nails: filling wedge-shaped grooves on two sides of the crack with mortar to ensure that the steel nail is buried;
(9) hanging a carbon fiber net: cutting the fiber net according to the size of chiseling the width of the plastering surface layer, coating SKO mosaic carbon fiber impregnating adhesive on one surface of the carbon fiber net, then pasting the surface coated with the SKO mosaic carbon fiber impregnating adhesive in a foundation pit, and repeatedly rolling the surface of the carbon fiber net along the crack direction by using a special smooth roller until the sizing material seeps out of the surface of the carbon fiber net so as to remove air bubbles and enable the sizing material to fully infiltrate the carbon fiber net;
(10) surface roughening: slurry throwing treatment is carried out on the foundation pit by adopting cement slurry, slurry throwing ensures uniformity, no dead angle and burr pulling-out, slurry throwing burrs protrude 0.8-1 cm, and maintenance is carried out after the slurry reaches certain strength;
(11) plastering: cleaning a base layer and fully wetting the base layer with water before plastering, ensuring layered plastering when plastering, wherein the thickness of each layer is 8-15 mm, and plastering and finishing can be carried out when six or seven layers of bottom ash are dry;
(12) recovering the putty powder and the paint: the surface of the wall body is recovered by using the putty powder and the paint, and the color of the wall body is consistent with that of the surrounding wall surface.
2. The method for preventing cracks in masonry wall of strong vibration ramp according to claim 1, wherein the method comprises the following steps: in the step 3, the gradient of the wedge-shaped groove is 30-45 degrees, and the depth is 60-100 mm; the width of the slit is 20-30 mm, and the depth is not less than 50 mm.
3. The method for preventing cracks in masonry wall of strong vibration ramp according to claim 1, wherein the method comprises the following steps: in the step 4, the steel nail is injected in the wedge-shaped groove at the middle position along the width direction of the wedge-shaped groove, and the height of the steel nail is not more than 30 mm.
4. The method for preventing cracks in masonry wall of strong vibration ramp according to claim 1, wherein the method comprises the following steps: in the step 6, the rare gas injection and the knot formation glue injection are carried out from the upper end to the lower end of the crack, and the time interval between the rare gas injection and the knot formation glue injection at the same position is not more than 10 s.
5. The method for preventing cracks in masonry wall of strong vibration ramp according to claim 1, wherein the method comprises the following steps: in the step 6, the structural adhesive is neutral silicone weather-resistant adhesive, an extrusion adhesive gun is used for injecting and forming the structural adhesive, the diameter of a gun nozzle is smaller than the width of the crack, the gun nozzle moves uniformly and slowly, and the crack is ensured to be filled with the sealing structural adhesive.
6. The method for preventing cracks in masonry wall of strong vibration ramp according to claim 1, wherein the method comprises the following steps: in the step 10, the cement paste is prepared by self-decocting the cement paste: sand = 1: 0.66, wherein the self-boiling glue is prepared according to the following ratio: water = 1: 16 are arranged in proportion.
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| KR100503237B1 (en) * | 2001-12-03 | 2005-07-25 | 이창남 | Reinforcing Method of Structural Members attaching the Strengthened membrane to the Faces |
| CN104405139B (en) * | 2014-12-03 | 2017-01-11 | 西南科技大学 | Strengthening method for stone wall body |
| CN104612398B (en) * | 2014-12-15 | 2016-09-07 | 陕西省建筑科学研究院 | Sunken wire tube position prevention and cure of crack construction method after masonry |
| CN108149945A (en) * | 2018-01-16 | 2018-06-12 | 江苏中森建筑设计有限公司 | A kind of quick crack repairing structure of easy construction and its construction method |
| CN108412222A (en) * | 2018-03-13 | 2018-08-17 | 广西金雨伞防水装饰有限公司 | A kind of construction leakage internal maintenance waterproof layer structure and construction technology |
| CN109024313A (en) * | 2018-08-20 | 2018-12-18 | 中水电第十工程局（郑州）有限公司 | A kind of lossless Concrete Paving Layer of Bridge Floor crack treatment construction method |
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Address after: 518000 No.3, area 39, Central District, Shiyan Town, Bao'an District, Shenzhen City, Guangdong Province (Hongfa Building) (Office) Patentee after: Shenzhen Hongyuan Construction Technology Co.,Ltd. Address before: 518108 No.3, area 39, Central District, Shiyan Town, Bao'an District, Shenzhen City, Guangdong Province (Hongfa Building) (Office) Patentee before: SHENZHEN HONG-YUAN CONSTRUCTION PROJECT CO.,LTD. |