CN110863671B - Repairing, reinforcing and reinforcing method for cement transmission tower and reinforcing component thereof - Google Patents
Repairing, reinforcing and reinforcing method for cement transmission tower and reinforcing component thereof Download PDFInfo
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- CN110863671B CN110863671B CN201911271949.4A CN201911271949A CN110863671B CN 110863671 B CN110863671 B CN 110863671B CN 201911271949 A CN201911271949 A CN 201911271949A CN 110863671 B CN110863671 B CN 110863671B
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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
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/62—Insulation or other protection; Elements or use of specified material therefor
- E04B1/66—Sealings
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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
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/24—Safety or protective measures preventing damage to building parts or finishing work during construction
Abstract
The invention discloses a repairing, reinforcing and reinforcing method of a cement transmission tower and a reinforcing component thereof, which finish repairing, reinforcing and reinforcing by seven steps of cleaning a damaged part of the cement transmission tower, derusting a steel bar, painting an antirust coating, repairing concrete, coating an outer anticorrosive layer, installing the reinforcing component and painting a waterproof layer of the reinforcing component; the reinforcing component is simple and convenient to operate and easy to install, and can effectively support the damaged part of the cement transmission tower; the zinc phosphate precipitates on the surface of the steel bar in the process of flushing, and is solidified into a protective film after being dried, so that dirt on the surface of the steel bar can be removed; the graphene oxide is added into the water-based strong zinc protective coating, the graphene oxide has good dispersion performance and is easy to disperse in the coating, and the graphene oxide also improves the wear resistance and the corrosion resistance of the water-based strong zinc protective coating, so that the cement transmission tower can be better protected, and the service life of the cement transmission tower is effectively prolonged.
Description
Technical Field
The invention relates to the technical field of maintenance of power towers, in particular to a repairing, reinforcing and reinforcing method and a reinforcing component for a cement transmission tower.
Background
The transmission tower is one of basic devices in an overhead distribution line, mainly made of three materials, namely wood, metal and cement, wherein the cement transmission tower has the advantages of long service life, simplicity in maintenance, low cost and the like, and is widely applied. The cement transmission tower can be damaged by aging, cracking and even falling off of a cement layer of the tower body due to wind erosion, water erosion and even mechanical impact in the long-time use process. The strength of the damaged cement transmission tower is reduced, and the damaged cement transmission tower should be replaced or reinforced in time. However, long-time power failure is required for replacing the cement transmission tower, so that the reinforcement is a main method for maintaining the damaged cement transmission tower.
The traditional repairing means is that cement grouting is carried out at a place where cement damage occurs or simple components such as hoops are used for fastening after cement is coated, or the concrete is only reinforced through a simple reinforcing assembly, but the repairing effect of the mode is poor, the symptoms are treated, the root causes are not treated, and even the secondary damage of the cement transmission tower can be caused.
Patent 2014204046546 discloses an old cement wire pole reinforcing apparatus, comprises vertical gusset plate, transverse connection pole and outer casing the system has the outer casing mounting hole in the middle part of the plate body of vertical gusset plate, the outer casing pass through the screw and install it between two liang of vertical gusset plates the both ends of vertical gusset plate still symmetrical system have adjustable connecting hole, this adjustable connecting hole comprises 2-4 connecting holes that communicate mutually, wear to be equipped with transverse connection pole through this adjustable connecting hole between two liang of vertical gusset plates, pass through the nut maintenance at the both ends of connecting rod. The patent is ingenious in conception, but due to the limitation of the condition for fixing the plate, if deformation occurs or one screw is loosened, the integral fixation is easy to be unstable, and the reinforcing member even falls off.
Therefore, the above problems should be solved in time by those skilled in the art.
Disclosure of Invention
The invention aims to provide a repairing, reinforcing and reinforcing method of a cement transmission tower and a reinforcing component thereof, aiming at the problems, wherein the reinforcing component is simple and convenient to operate and easy to install, and can effectively support the damaged part of the cement transmission tower; the zinc phosphate precipitates on the surface of the steel bar in the process of flushing, and is solidified into a protective film after being dried, so that dirt on the surface of the steel bar can be removed; the graphene oxide is added into the water-based strong zinc protective coating, the graphene oxide has good dispersion performance and is easy to disperse in the coating, and the graphene oxide also improves the wear resistance and the corrosion resistance of the water-based strong zinc protective coating, so that the cement transmission tower can be better protected, and the service life of the cement transmission tower is effectively prolonged.
A repairing, reinforcing and reinforcing method for a cement transmission tower is characterized by comprising the following steps:
step 1, cleaning damaged parts of a cement transmission tower: chiseling out damaged concrete until no unfirm concrete exists and steel bars are exposed; chiseling the surface of the concrete and removing concrete powder by using a brush;
step 2, derusting the steel bars: firstly, removing the rust, and then coating a rust removing liquid; finally, washing with an ethanol solution; forming a protective film outside the steel bar after drying;
step 3, brushing an antirust coating: firstly, coating a layer of water-based primer on the protective film to serve as inner-layer protection, and coating an outer-layer water-based strong zinc protective coating after the primer is dried;
step 4, reinforcing the concrete: preparing concrete filler, filling the concrete filler at the damaged part of the cement transmission tower, drying and shaping the concrete filler to be consistent with the shape of the original cement transmission tower;
step 5, coating an outer anticorrosive layer: coating the water-based strong zinc protective coating in the step 3 for three times;
step 6, installing a reinforcing component: installing a reinforcing component outside the cement transmission tower;
step 7, painting a waterproof layer of the reinforcing component: and (4) coating the water-based strong zinc protective coating in the step (3) on the reinforcing component for two times to finish the repair and reinforcement.
Preferably, the rust removing liquid in the step 2 is prepared from 0.1-1 part of zinc phosphate, 3-4 parts of nonionic surfactant and an antifoaming agent: 0.08-0.1, 8-10 parts of monoammonium citrate and water: 88.82-84.9 above components are mixed; the volume fraction of the ethanol solution is 75-95%.
Preferably, the formula of the aqueous strong zinc protective coating in the step 3 and the weight percentages of the components are as follows: single-component water-based epoxy coating: 20-30% of a single-component waterborne polyurethane coating: 30-40% of zinc powder: 25-35% of graphene oxide powder: 0.02-1%, rare earth element RE: 0.5 to 1.5 percent.
Further, in the step 3, the aqueous strong zinc protective coating single-component aqueous polyurethane coating comprises the following components in parts by weight: 99.85-99.2, and the graphene oxide powder comprises the following components in parts by weight: 0.15 to 0.8.
Preferably, when preparing concrete in the step 4, cement is stirred by the diluted one-component aqueous polyurethane coating; the dilution method of the single-component waterborne polyurethane coating is characterized in that the single-component waterborne polyurethane coating and water are diluted according to the volume ratio of 1: 1-3.
Further, in the step 4, 0.5Kg to 1.2Kg of steel fiber is added to every 100Kg of concrete.
The steel fiber comprises the following components in parts by mass: the length-diameter ratio of the steel fiber is 30-60: 50-70, length-diameter ratio of 80-100: 50-30.
The steel fiber is in a mixed mode of one or more of wave type, twist type and end configuration;
the utility model provides a cement transmission tower's reinforcement subassembly which characterized in that: the reinforcing component is cylindrical in overall structure and comprises a first body and a second body which are centrosymmetric, wherein the first body and the second body respectively comprise a semicircular reinforcing cylinder; two ends of the reinforcing cylinder are welded with two connecting lugs; the first body and the second body are connected through a connecting hole bolt of the connecting lug;
the reinforcing component also comprises an anchor clamping piece and a steel strand; a reinforcing plate is welded at the top of the reinforcing cylinder along the axial direction of the reinforcing cylinder, a plurality of through holes are formed in the reinforcing plate along the axial direction of the reinforcing cylinder, the through hole at the first end of the reinforcing plate is an anchor hole, and the anchor hole is matched with the anchor clamping piece; the steel strand is spirally wound outside the reinforcing component; the first end of the steel strand is anchored with the anchor hole of the first body through the anchor clamping piece; and the second end of the steel strand is anchored with the anchor hole of the second body through the anchor clamping piece.
Preferably, the anchor clamping piece is of a two-piece type and comprises a first clamping piece and a second clamping piece, semi-cylindrical grooves are formed in the circle centers of the first clamping piece and the second clamping piece, and a plurality of convex teeth are arranged on the side walls of the grooves.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the monoammonium citrate in the antirust liquid can react with the iron rust on the surface of the steel bar to form a complex, the surfactant can remove oil stains on the surface of the steel bar, 75-95% of ethanol solution can fully wash away the monoammonium citrate, the complex, the nonionic surfactant and the like in the antirust liquid, and the zinc phosphate is insoluble in ethanol and pure water, so that the zinc phosphate is precipitated on the surface of the steel bar in the washing process, and is solidified into a protective film after being dried;
according to the invention, the graphene oxide is added into the water-based strong zinc protective coating, the graphene oxide has good dispersion performance and is easy to disperse in the coating, and the graphene oxide also improves the wear resistance and the corrosion resistance of the water-based strong zinc protective coating, so that a cement transmission tower can be better protected;
the single-component waterborne polyurethane coating doped in the concrete improves the binding power between new and old concrete and shortens the drying time of the concrete; the steel fiber improves the shear strength, the compressive strength and the compressive toughness of the concrete, and effectively strengthens the bearing capacity and the bending resistance of the cement transmission tower;
the reinforcing component has the advantages of simple structure, simplicity and convenience in operation and easiness in installation, can effectively support the damaged part of the cement transmission tower, thereby effectively prolonging the service life of the cement transmission tower, is easy to realize and is suitable for popularization and application.
Drawings
FIG. 1 is a schematic diagram of the matching relationship between a fixing part and a steel strand in the invention;
FIG. 2 is a schematic diagram of the structure of the add-on firmware of the present invention;
FIG. 3 is a schematic structural diagram of a first body of the fastener of the present invention;
FIG. 4 is a schematic structural diagram of a second body of the fastener of the present invention;
FIG. 5 is a schematic structural view of an anchor clip according to the present invention;
FIG. 6 is a schematic view of a first clip structure according to the present invention;
reference numeral, 100-reinforcement, 101-first body, 102-second body, 103-reinforcement cylinder, 104 engaging lug, 105-reinforcement plate, 106-anchor hole, 200-anchor clip, 201-first clip, 202-second clip, 203 groove, 204-convex tooth.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings, which are shown in fig. 1-6.
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific examples described herein are only for illustrating the present invention and are not intended to limit the present invention, and the one-component aqueous polyurethane waterproofing coating according to the present invention is not limited to a certain brand, model or a certain specific component; the graphene oxide can be any commercially available graphene oxide. The nonionic surfactant is one of fatty alcohol polyethylene (7) ether, fatty alcohol polyethylene (15) ether, fatty amine polyoxyethylene ether and polysiloxane polyether copolymer. The steel fiber is one or a mixture of a plurality of wave-shaped, twisted or end head configurations; the defoaming agent can be selected from polyether defoaming agent, silicon defoaming agent, polyether modified silicon defoaming agent and other defoaming agents.
The first embodiment is as follows:
a method for repairing, reinforcing and reinforcing a cement transmission tower comprises the following steps:
(1) and (4) cleaning the damaged part of the cement transmission tower. The damaged concrete is chiseled by using an angle grinder, an electric hammer or a chisel until no insecure concrete exists, the reinforcing steel bars are exposed to form a regular gap, then the surface of the gap concrete is chiseled by using the angle grinder or the chisel, and finally the powder on the surface of the concrete is removed by using a brush.
(2) And (5) derusting the steel bars. Firstly, using tools such as steel wire balls or sand paper to remove the rust on the surface layer of the steel bar, and then brushing the rust removing liquid to deeply remove the rust on the steel bar. The preparation method of 1Kg of rust removing liquid is that 0.05Kg of monoammonium citrate is added into 0.909Kg of water and stirred evenly, then 0.001Kg of zinc phosphate is added and stirred evenly, and finally 0.03Kg of nonionic surfactant and 0.001Kg of defoaming agent are added and stirred evenly.
And (4) coating or spraying the rust removing liquid on the surface of the steel bar to remove the oxidation layer. Then the surface of the steel bar is cleaned by using 75-95% (volume fraction) of ethanol solution.
(3) And (4) brushing an antirust coating. Firstly, a layer of water-based primer is coated outside the protective film to serve as inner-layer protection, and after the primer is dried, an outer-layer water-based strong zinc protective coating is coated. The water-based strong zinc protective coating comprises A, B two components, wherein the component A is a single-component water-based polyurethane coating, and the component B is graphene oxide powder. The preparation method of 1Kg of water-based strong zinc protective coating comprises the steps of adding 0.0002Kg of graphene oxide powder into 0.9998Kg of single-component water-based polyurethane coating, and uniformly stirring by using a low-speed stirrer.
And (3) brushing the water-based strong zinc protective coating after uniformly stirring for three times, brushing the first paint for the second time after the first paint is dried, brushing the second paint for the third time after the second time is dried, wherein the thickness of each paint cannot be lower than 40 mu m.
(4) And (5) reinforcing the concrete. Preparing concrete, diluting the concrete by using water and the single-component waterborne polyurethane coating according to the volume ratio of 1:1, and stirring the concrete by using the diluted single-component waterborne polyurethane coating. 0.5Kg of steel fibres is added per 100Kg of concrete. The steel fibers added to the concrete were mixed with 0.25Kg of steel fibers having an aspect ratio of 30 and 0.25Kg of steel fibers having an aspect ratio of 80. And filling the concrete into the damaged part of the cement transmission tower. And after the concrete is dried, polishing the concrete by using an angle grinder to ensure that the outer surface of the supplemented concrete is consistent with the shape of the cement pole.
(5) And coating an outer anticorrosive layer. Firstly, coating a boundary finish on the outer surface of the concrete, and coating a protective coating after the finish is dried. And (4) coating the water-based strong zinc protective coating in the step (3) with a total thickness of 0.5mm and a coating size exceeding the bonding boundary line of new and old concrete to realize effective coverage of the damaged area.
(6) And installing a reinforcing component.
The reinforcement assembly includes a reinforcement member 100, an anchor clip 200, and a steel strand. The reinforcement member 100 includes a first body 101 and a second body 102 that are centrosymmetric, and the first body 101 and the second body 102 each include a semi-circular reinforcement cylinder 103. Two ends of the reinforcing cylinder 103 are welded with two connecting lugs 104, and the connecting lugs 104 are provided with connecting holes for bolts to pass through; the first body 101 and the second body 102 are bolted; and a reinforcing plate 105 is welded at the vertex of the reinforcing cylinder 103 along the axial direction of the reinforcing cylinder 103, and the reinforcing plate 105 is provided with a plurality of through holes along the axial direction of the reinforcing cylinder 103, wherein the through hole at the first end of the reinforcing plate 105 is an anchor hole 106, and the anchor hole 106 is matched with the anchor clip 200.
The anchor clamping piece 200 is of a two-piece type, is integrally in a circular truncated cone shape, and comprises a first clamping piece 201 and a second clamping piece 202 which are arranged in a mirror image mode, semi-cylindrical grooves 203 are formed in the circle centers of the first clamping piece 201 and the second clamping piece 202, and a plurality of convex teeth 204 are arranged on the side walls of the grooves 203.
When the steel strand cable is installed, the first body 101 and the second body 102 are connected through the connecting lug 104 and the connecting bolt to form the reinforcing member 100 which is fixed at the damaged part of the cement transmission tower, then the first end of the steel strand cable penetrates through the anchor hole 106 of the first body 101 and is fastened in the anchor hole 106 through the anchor clamping piece 200, and the steel strand cable is left with 5 mm-10 mm allowance outside the anchor hole 106. The second end of the steel strand sequentially passes through the through holes of the second body 102 and the first body 101 to be wound on the outer side of the reinforcing cylinder 103 in a spiral shape, and finally passes through the anchor hole 106 of the second body 102 to be drawn by the drawing device and fixed in the anchor hole 106 by the anchor clamping piece 200.
(7) And painting a waterproof layer of the reinforcing component. And (4) coating the water-based strong zinc protective coating in the step (3) for two times.
The second embodiment is as follows:
a method for repairing, reinforcing and reinforcing a cement transmission tower comprises the following steps:
(1) and (4) cleaning the damaged part of the cement transmission tower. And (4) cleaning the damaged part of the cement transmission tower. The damaged concrete is chiseled by using an angle grinder, an electric hammer or a chisel until no insecure concrete exists, the reinforcing steel bars are exposed to form a regular gap, then the surface of the gap concrete is chiseled by using the angle grinder or the chisel, and finally the powder on the surface of the concrete is removed by using a brush.
(2) And (5) derusting the steel bars. Firstly, using tools such as steel wire balls or sand paper to remove the rust on the surface layer of the steel bar, and then brushing the rust removing liquid to deeply remove the rust on the steel bar. The preparation method of 1Kg of rust removing liquid is that 0.08Kg of monoammonium citrate is added into 0.909Kg of water and stirred uniformly, then 0.005Kg of zinc phosphate is added and stirred uniformly, and finally 0.035Kg of nonionic surfactant and 0.0008Kg of defoaming agent are added and stirred uniformly.
And (4) coating or spraying the rust removing liquid on the surface of the steel bar to remove the oxidation layer. Then the surface of the steel bar is cleaned by using 75-95% (volume fraction) of ethanol solution.
(3) And (4) brushing an antirust coating. Firstly, a layer of water-based primer is coated outside the protective film to serve as inner-layer protection, and after the primer is dried, an outer-layer water-based strong zinc protective coating is coated. The water-based strong zinc protective coating comprises A, B two components, wherein the component A is a single-component water-based polyurethane coating, and the component B is graphene oxide powder. The preparation method of 1Kg of water-based strong zinc protective coating comprises the steps of adding 0.0015Kg of graphene oxide powder into 0.9985Kg of single-component water-based polyurethane coating, and uniformly stirring by using a low-speed stirrer.
And (3) brushing the water-based strong zinc protective coating after uniformly stirring for three times, brushing the first paint for the second time after the first paint is dried, brushing the second paint for the third time after the second time is dried, wherein the thickness of each paint cannot be lower than 40 mu m.
(4) And (5) reinforcing the concrete. Preparing concrete, diluting the concrete with water and the single-component waterborne polyurethane coating according to the volume ratio of 2:1, and stirring the concrete with the diluted single-component waterborne polyurethane coating. 0.7Kg of steel fibres is added per 100Kg of concrete. The steel fibers added to the concrete were mixed with 0.42Kg of steel fibers having an aspect ratio of 40 and 0.28Kg of steel fibers having an aspect ratio of 90. And filling the concrete into the damaged part of the cement transmission tower. And after the concrete is dried, polishing the concrete by using an angle grinder to ensure that the outer surface of the supplemented concrete is consistent with the shape of the cement pole.
(5) And coating an outer anticorrosive layer. Firstly, coating an interface paint on the outer surface of the concrete, and coating a protective paint after the interface paint is dried. And (4) coating the water-based strong zinc protective coating in the step (3) with the total thickness of 1mm and the coating size exceeding the bonding boundary line of new and old concrete, thereby realizing effective coverage of the damaged area.
(6) And installing a reinforcing component. The reinforcement assembly includes a reinforcement member 100, an anchor clip 200, and a steel strand. The reinforcement member 100 includes a first body 101 and a second body 102 that are centrosymmetric, and the first body 101 and the second body 102 each include a semi-circular reinforcement cylinder 103. Two ends of the reinforcing cylinder 103 are welded with two connecting lugs 104, and the connecting lugs 104 are provided with connecting holes for bolts to pass through; the first body 101 and the second body 102 are bolted; and a reinforcing plate 105 is welded at the vertex of the reinforcing cylinder 103 along the axial direction of the reinforcing cylinder 103, and the reinforcing plate 105 is provided with a plurality of through holes along the axial direction of the reinforcing cylinder 103, wherein the through hole at the first end of the reinforcing plate 105 is an anchor hole 106, and the anchor hole 106 is matched with the anchor clip 200.
The anchor clamping piece 200 is of a two-piece type, is integrally in a circular truncated cone shape, and comprises a first clamping piece 201 and a second clamping piece 202 which are arranged in a mirror image mode, semi-cylindrical grooves 203 are formed in the circle centers of the first clamping piece 201 and the second clamping piece 202, and a plurality of convex teeth 204 are arranged on the side walls of the grooves 203.
When the steel strand cable is installed, the first body 101 and the second body 102 are connected through the connecting lug 104 and the connecting bolt to form the reinforcing member 100 which is fixed at the damaged part of the cement transmission tower, then the first end of the steel strand cable penetrates through the anchor hole 106 of the first body 101 and is fastened in the anchor hole 106 through the anchor clamping piece 200, and the steel strand cable is left with 5 mm-10 mm allowance outside the anchor hole 106. The second end of the steel strand sequentially passes through the through holes of the second body 102 and the first body 101 to be wound on the outer side of the reinforcing cylinder 103 in a spiral shape, and finally passes through the anchor hole 106 of the second body 102 to be drawn by the drawing device and fixed in the anchor hole 106 by the anchor clamping piece 200.
(7) And painting a waterproof layer of the reinforcing component. And (4) coating the water-based strong zinc protective coating in the step (3) for two times.
The third concrete embodiment:
a method for repairing, reinforcing and reinforcing a cement transmission tower comprises the following steps:
(1) and (4) cleaning the damaged part of the cement transmission tower. And (4) cleaning the damaged part of the cement transmission tower. The damaged concrete is chiseled by using an angle grinder, an electric hammer or a chisel until no insecure concrete exists, the reinforcing steel bars are exposed to form a regular gap, then the surface of the gap concrete is chiseled by using the angle grinder or the chisel, and finally the powder on the surface of the concrete is removed by using a brush.
(2) And (5) derusting the steel bars. Firstly, using tools such as steel wire balls or sand paper to remove the rust on the surface layer of the steel bar, and then brushing the rust removing liquid to deeply remove the rust on the steel bar. The preparation method of 1Kg of rust removing liquid is that 0.08Kg of monoammonium citrate is added into 0.9585Kg of water and stirred evenly, then 0.005Kg of zinc phosphate is added and stirred evenly, and finally 0.004Kg of nonionic surfactant and 0.001Kg of defoamer are added and stirred evenly.
And (4) coating or spraying the rust removing liquid on the surface of the steel bar to remove the oxidation layer. Then the surface of the steel bar is cleaned by using 75-95% (volume fraction) of ethanol solution.
(3) And (4) brushing an antirust coating. Firstly, a layer of water-based primer is coated outside the protective film to serve as inner-layer protection, and after the primer is dried, an outer-layer water-based strong zinc protective coating is coated. The water-based strong zinc protective coating comprises A, B two components, wherein the component A is a single-component water-based polyurethane coating, and the component B is graphene oxide powder. The preparation method of 1Kg of aqueous strong zinc protective coating comprises the steps of adding 0.008Kg of graphene oxide powder into 0.992Kg of single-component aqueous polyurethane coating, and uniformly stirring by using a low-speed stirrer.
And (3) brushing the water-based strong zinc protective coating after uniformly stirring for three times, brushing the first paint for the second time after the first paint is dried, brushing the second paint for the third time after the second time is dried, wherein the thickness of each paint cannot be lower than 40 mu m.
(4) And (5) reinforcing the concrete. Preparing concrete, diluting the concrete with water and the single-component waterborne polyurethane coating according to the volume ratio of 3:1, and stirring the concrete with the diluted single-component waterborne polyurethane coating. 0.9Kg of steel fibres is added per 100Kg of concrete. The steel fibres added to the concrete were mixed from 0.54Kg of steel fibres with an aspect ratio of 60 and 036g of steel fibres with an aspect ratio of 90. And filling the concrete into the damaged part of the cement transmission tower. And after the concrete is dried, polishing the concrete by using an angle grinder to ensure that the outer surface of the supplemented concrete is consistent with the shape of the cement pole.
(5) And coating an outer anticorrosive layer. Firstly, coating an interface paint on the outer surface of the concrete, and coating a protective paint after the interface paint is dried. And (4) coating the water-based strong zinc protective coating in the step (3) with the total thickness of 1mm and the coating size exceeding the bonding boundary line of new and old concrete, thereby realizing effective coverage of the damaged area.
(6) And installing a reinforcing component. The reinforcement assembly includes a reinforcement member 100, an anchor clip 200, and a steel strand. The reinforcement member 100 includes a first body 101 and a second body 102 that are centrosymmetric, and the first body 101 and the second body 102 each include a semi-circular reinforcement cylinder 103. Two ends of the reinforcing cylinder 103 are welded with two connecting lugs 104, and the connecting lugs 104 are provided with connecting holes for bolts to pass through; the first body 101 and the second body 102 are bolted; and a reinforcing plate 105 is welded at the vertex of the reinforcing cylinder 103 along the axial direction of the reinforcing cylinder 103, and the reinforcing plate 105 is provided with a plurality of through holes along the axial direction of the reinforcing cylinder 103, wherein the through hole at the first end of the reinforcing plate 105 is an anchor hole 106, and the anchor hole 106 is matched with the anchor clip 200.
The anchor clamping piece 200 is of a two-piece type, is integrally in a circular truncated cone shape, and comprises a first clamping piece 201 and a second clamping piece 202 which are arranged in a mirror image mode, semi-cylindrical grooves 203 are formed in the circle centers of the first clamping piece 201 and the second clamping piece 202, and a plurality of convex teeth 204 are arranged on the side walls of the grooves 203.
When the steel strand cable is installed, the first body 101 and the second body 102 are connected through the connecting lug 104 and the connecting bolt to form the reinforcing member 100 which is fixed at the damaged part of the cement transmission tower, then the first end of the steel strand cable penetrates through the anchor hole 106 of the first body 101 and is fastened in the anchor hole 106 through the anchor clamping piece 200, and the steel strand cable is left with 5 mm-10 mm allowance outside the anchor hole 106. The second end of the steel strand sequentially passes through the through holes of the second body 102 and the first body 101 to be wound on the outer side of the reinforcing cylinder 103 in a spiral shape, and finally passes through the anchor hole 106 of the second body 102 to be drawn by the drawing device and fixed in the anchor hole 106 by the anchor clamping piece 200.
(7) And painting a waterproof layer of the reinforcing component. And (4) coating the water-based strong zinc protective coating in the step (3) for two times.
The fourth concrete embodiment:
a method for repairing, reinforcing and reinforcing a cement transmission tower comprises the following steps:
(1) and (4) cleaning the damaged part of the cement transmission tower. And (4) cleaning the damaged part of the cement transmission tower. The damaged concrete is chiseled by using an angle grinder, an electric hammer or a chisel until no insecure concrete exists, the reinforcing steel bars are exposed to form a regular gap, then the surface of the gap concrete is chiseled by using the angle grinder or the chisel, and finally the powder on the surface of the concrete is removed by using a brush.
(2) And (5) derusting the steel bars. Firstly, using tools such as steel wire balls or sand paper to remove the rust on the surface layer of the steel bar, and then brushing the rust removing liquid to deeply remove the rust on the steel bar. The preparation method of 1Kg of rust removing liquid is that 0.1Kg of monoammonium citrate is added into 0.8451Kg of water and stirred evenly, then 0.01Kg of zinc phosphate is added and stirred evenly, and finally 0.035Kg of nonionic surfactant and 0.0009Kg of defoamer are added and stirred evenly.
And (4) coating or spraying the rust removing liquid on the surface of the steel bar to remove the oxidation layer. Then the surface of the steel bar is cleaned by using 75-95% (volume fraction) of ethanol solution.
(3) And (4) brushing an antirust coating. Firstly, a layer of water-based primer is coated outside the protective film to serve as inner-layer protection, and after the primer is dried, an outer-layer water-based strong zinc protective coating is coated. The water-based strong zinc protective coating comprises A, B two components, wherein the component A is a single-component water-based polyurethane coating, and the component B is graphene oxide powder. The preparation method of 1Kg of water-based strong zinc protective coating comprises the steps of adding 0.01Kg of graphene oxide powder into 0.99Kg of single-component water-based polyurethane coating, and uniformly stirring by using a low-speed stirrer.
And (3) brushing the water-based strong zinc protective coating after uniformly stirring for three times, brushing the first paint for the second time after the first paint is dried, brushing the second paint for the third time after the second time is dried, wherein the thickness of each paint cannot be lower than 40 mu m.
(4) And (5) reinforcing the concrete. Preparing concrete according to the strength standard of C50 or C55, diluting the concrete by water and the single-component aqueous polyurethane coating according to the volume ratio of 2:1, and stirring the concrete by the diluted single-component aqueous polyurethane coating. 1.2Kg of steel fibres are added per 100Kg of concrete. The steel fibres added to the concrete are mixed from 0.84Kg of steel fibres with an aspect ratio of 30 and 0.36g of steel fibres with an aspect ratio of 100. And filling the concrete into the damaged part of the cement transmission tower. And after the concrete is dried, polishing the concrete by using an angle grinder to ensure that the outer surface of the supplemented concrete is consistent with the shape of the cement pole.
(5) And coating an outer anticorrosive layer. Firstly, coating an interface paint on the outer surface of the concrete, and coating a protective paint after the interface paint is dried. And (4) coating the water-based strong zinc protective coating in the step (3) with a total thickness of 1.5mm and a coating size exceeding the bonding boundary line of new and old concrete to realize effective coverage of the damaged area.
(6) And installing a reinforcing component. The reinforcement assembly includes a reinforcement member 100, an anchor clip 200, and a steel strand. The reinforcement member 100 includes a first body 101 and a second body 102 that are centrosymmetric, and the first body 101 and the second body 102 each include a semi-circular reinforcement cylinder 103. Two ends of the reinforcing cylinder 103 are welded with two connecting lugs 104, and the connecting lugs 104 are provided with connecting holes for bolts to pass through; the first body 101 and the second body 102 are bolted; and a reinforcing plate 105 is welded at the vertex of the reinforcing cylinder 103 along the axial direction of the reinforcing cylinder 103, and the reinforcing plate 105 is provided with a plurality of through holes along the axial direction of the reinforcing cylinder 103, wherein the through hole at the first end of the reinforcing plate 105 is an anchor hole 106, and the anchor hole 106 is matched with the anchor clip 200.
The anchor clamping piece 200 is of a two-piece type, is integrally in a circular truncated cone shape, and comprises a first clamping piece 201 and a second clamping piece 202 which are arranged in a mirror image mode, semi-cylindrical grooves 203 are formed in the circle centers of the first clamping piece 201 and the second clamping piece 202, and a plurality of convex teeth 204 are arranged on the side walls of the grooves 203.
When the steel strand cable is installed, the first body 101 and the second body 102 are connected through the connecting lug 104 and the connecting bolt to form the reinforcing member 100 which is fixed at the damaged part of the cement transmission tower, then the first end of the steel strand cable penetrates through the anchor hole 106 of the first body 101 and is fastened in the anchor hole 106 through the anchor clamping piece 200, and the steel strand cable is left with 5 mm-10 mm allowance outside the anchor hole 106. The second end of the steel strand sequentially passes through the through holes of the second body 102 and the first body 101 to be wound on the outer side of the reinforcing cylinder 103 in a spiral shape, and finally passes through the anchor hole 106 of the second body 102 to be drawn by the drawing device and fixed in the anchor hole 106 by the anchor clamping piece 200.
(7) And painting a waterproof layer of the reinforcing component. And (4) coating the water-based strong zinc protective coating in the step (3) for two times.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (1)
1. A repairing, reinforcing and reinforcing method for a cement transmission tower is characterized by comprising the following steps:
step 1, cleaning damaged parts of a cement transmission tower: chiseling out damaged concrete until no unfirm concrete exists and steel bars are exposed; chiseling the surface of the concrete and removing concrete powder by using a brush;
step 2, derusting the steel bars: firstly removing the rust, and then coating a rust removing liquid, wherein the rust removing liquid is prepared from 0.1-1 part of zinc phosphate, 3-4 parts of nonionic surfactant and an antifoaming agent: 0.08-0.1 part of monoammonium citrate, 8-10 parts of water: 88.82-84.9 parts by weight, and finally washing with 75% -95% by volume of ethanol solution; forming a protective film outside the steel bar after drying;
step 3, brushing an antirust coating: firstly, coating a layer of water-based primer on the protective film to serve as inner-layer protection, and coating an outer-layer water-based strong zinc protective coating after the primer is dried;
step 4, reinforcing the concrete: when preparing concrete, stirring cement by using the diluted single-component waterborne polyurethane coating; filling the damaged part of the cement transmission tower, drying and shaping to be consistent with the original shape of the cement transmission tower; the dilution method of the single-component waterborne polyurethane coating is characterized in that the single-component waterborne polyurethane coating is diluted with water according to the volume ratio of 1: 1-3;
adding 0.5Kg to 1.2Kg of steel fiber into every 100Kg of concrete;
the steel fiber comprises the following components in parts by mass: the length-diameter ratio of the steel fiber is 30-60: 50-70, length-diameter ratio of 80-100: 50-30;
step 5, coating an outer anticorrosive layer: coating the water-based strong zinc protective coating in the step 3 for three times;
step 6, installing a reinforcing component: installing a reinforcing component outside the cement transmission tower;
the reinforcing component is cylindrical in overall structure and comprises a first body and a second body which are centrosymmetric, wherein the first body and the second body respectively comprise a semicircular reinforcing cylinder; two ends of the reinforcing cylinder are welded with two connecting lugs; the first body and the second body are connected through a connecting hole bolt of the connecting lug;
the reinforcing component also comprises an anchor clamping piece and a steel strand; a reinforcing plate is welded at the top of the reinforcing cylinder along the axial direction of the reinforcing cylinder, a plurality of through holes are formed in the reinforcing plate along the axial direction of the reinforcing cylinder, the through hole at the first end of the reinforcing plate is an anchor hole, and the anchor hole is matched with the anchor clamping piece; the steel strand is spirally wound outside the reinforcing component; the first end of the steel strand is anchored with the anchor hole of the first body through the anchor clamping piece; the second end of the steel strand is anchored with the anchor hole of the second body through the anchor clamping piece;
the anchor clamping piece is of a two-piece type and comprises a first clamping piece and a second clamping piece, semi-cylindrical grooves are formed in the circle center positions of the first clamping piece and the second clamping piece, and a plurality of convex teeth are arranged on the side walls of the grooves;
the reinforcing component is installed, the first body and the second body are connected through connecting bolts by using the connecting lugs to form a reinforcing member fixed at a damaged part of the cement transmission tower, then the first end of the steel strand penetrates through the anchor hole of the first body and is fastened in the anchor hole through the anchor clamping piece, the steel strand is left with a margin of 5mm to 10mm outside the anchor hole, the second end of the steel strand sequentially penetrates through the through holes of the second body and the first body to be wound on the outer side of the reinforcing cylinder in a spiral shape, and finally the steel strand penetrates through the anchor hole of the second body and is pulled by the pulling device and is fixed in the anchor hole by using the anchor clamping piece;
step 7, painting a waterproof layer of the reinforcing component: and (4) coating the water-based strong zinc protective coating in the step (3) on the reinforcing component for two times to finish the repair and reinforcement.
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