CN110905227A - Method for reinforcing concrete column - Google Patents
Method for reinforcing concrete column Download PDFInfo
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- CN110905227A CN110905227A CN201911149318.5A CN201911149318A CN110905227A CN 110905227 A CN110905227 A CN 110905227A CN 201911149318 A CN201911149318 A CN 201911149318A CN 110905227 A CN110905227 A CN 110905227A
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- concrete
- reinforcing
- concrete column
- steel pipe
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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
Abstract
The invention discloses a method for reinforcing a concrete column, which comprises the following steps: roughening, fixing a shell, pouring, performing surface treatment and maintaining; under the action of the interface treatment agent for the new and old concrete, the original concrete layer and the regenerated concrete are firmly connected, so that the problem that the stress of the joint surface between the original concrete layer and the regenerated concrete cannot be coordinated with each other is solved; the steel pipe provides support for the recycled concrete during slurry collection and supports the whole recycled concrete, so that the recycled concrete is prevented from being in hard contact with the outside; the carbon fiber composite cloth and the epoxy adhesive layer prevent the outside of the steel pipe from being exposed in the air to rust, and the reinforcing reliability and the service life of the steel pipe are prolonged; a plurality of pegs A, peg B are located recycled concrete, strengthen the cohesive force of original concrete layer and recycled concrete.
Description
Technical Field
The invention belongs to the technical field of building concrete, and relates to a method for reinforcing a concrete column.
Background
On some old-fashioned building bodies, when the weight inside the building body is increased, the long-term columns need to be reinforced so as to increase the bearing capacity of the columns; at present mostly use outsourcing concrete increase cross-section reinforcement method to the cylinder, increase recycled concrete also on original concrete layer cylinder outside quadrilaterals, in order to share the pressure that original concrete layer bore, in order to strengthen the dynamics of bearing, recycled concrete also need correspond the increase, the recycled concrete occupation space that leads to the outsourcing is big, simultaneously because be mutually independent between original concrete layer and the recycled concrete, lead to the faying face atress between original concrete layer and the recycled concrete can not be coordinated each other, original concrete layer and recycled concrete can not form effectual support to the building body simultaneously can appear.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for reinforcing a concrete column.
The invention is realized by the following technical scheme.
The invention provides a method for reinforcing a concrete column, which comprises the following steps:
scabbling: chiseling the peripheral surface of the original concrete layer, brushing a new and old concrete interface treating agent, and firmly connecting the original concrete layer and the regenerated concrete under the action of the new and old concrete interface treating agent;
fixing the shell: steel pipes are sleeved on the periphery of an original concrete layer, the steel pipes are formed by welding curled steel plates, and the steel pipes have the following functions: firstly, a steel pipe is used for providing a supporting function for recycled concrete during slurry collection; secondly, the whole body is supported, and meanwhile, the recycled concrete is prevented from being in hard contact with the outside;
pouring: fresh concrete is poured from the upper part of the circular steel tube and is compacted by vibration, mechanical vibration or manual vibration can be carried out, and the top of the regenerated concrete at the top is flush with the top of the circular steel tube;
surface treatment: polishing and derusting the surface of the circular steel pipe, then wiping the surface of the circular steel pipe, coating an epoxy glue layer on the surface of the steel pipe after drying, winding and wrapping carbon fiber composite cloth on the surface of the circular steel pipe in an annular manner, and under the action of the carbon fiber composite cloth and the epoxy glue layer, avoiding the outer part of the steel pipe from being exposed in the air to rust, and prolonging the reinforcing reliability and service life of the steel pipe;
and (5) maintenance: and (3) curing the integral concrete column for at least 28 days at the temperature of 20 +/-2 ℃ by pouring with tap water, so as to ensure that the strength of the new mixed soil layer meets the requirement.
The steel pipe bottom outside is closely installed unable adjustment base, unable adjustment base's inner circle is cavity, unable adjustment base's inner circle side and steel pipe bottom in close contact with, unable adjustment base passes through nut and ground beam fixed connection to improve the stability of steel pipe, convenient dismantlement.
In the roughening step, a plurality of studs A are implanted into the outer periphery of the original concrete layer, a plurality of studs B are welded to the inner periphery of the steel pipe in the shell fixing step, and after the pouring of the fresh concrete is completed, the studs A and the studs B are located in the regenerated concrete to strengthen the bonding force between the original concrete layer and the regenerated concrete.
The studs A and the studs B are distributed in a staggered mode on the axis in a radial collinear mode, and the connecting firmness of the original concrete layer and the recycled concrete layer is improved.
The top of the steel pipe is connected with the beam at the top through the bolt, so that the stability of the steel pipe is improved.
In the step of chisel hair, the degree of depth of chisel hair is 10mm, for guaranteeing original concrete layer with recycled concrete be connected more firmly, avoid simultaneously causing the damage to the stirrup and the vertical muscle of original concrete layer inner structure.
In the roughening step, the interface treatment agent for the new and old concrete is coated into two layers, the first layer of coating is mainly used for wetting the joint surface of the new and old concrete, and the second layer of coating is used for ensuring the dosage of the interface treatment agent, and if too much dosage is used, part of roughened surfaces can be filled, so that the roughening effect is influenced.
In the step that the shell is fixed, unable adjustment base's thickness is 50mm, and the quantity of nut is no less than 4, improves and fixes a position the steel pipe.
In the step of fixing the shell, the clearance between the round steel tube and the concrete column is more than or equal to 60mm, so that the recycled concrete can be poured and vibrated conveniently.
The invention has the beneficial effects that: under the action of the interface treatment agent for the new and old concrete, the original concrete layer and the regenerated concrete are firmly connected, so that the problem that the stress of the joint surface between the original concrete layer and the regenerated concrete cannot be coordinated with each other is solved; the steel pipe provides support for the recycled concrete during slurry collection and supports the whole recycled concrete, so that the recycled concrete is prevented from being in hard contact with the outside; the carbon fiber composite cloth and the epoxy adhesive layer prevent the outside of the steel pipe from being exposed in the air to rust, and the reinforcing reliability and the service life of the steel pipe are prolonged; a plurality of pegs A, peg B are located recycled concrete, strengthen the cohesive force of original concrete layer and recycled concrete.
Drawings
FIG. 1 is a schematic top view of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is an enlarged partial schematic view at B in FIG. 2;
FIG. 4 is a schematic front view of the present invention;
fig. 5 is a cross-sectional view taken along line C-C of fig. 4.
In the figure: 1-original concrete layer; 2-carbon fiber composite cloth; 3-a steel pipe; 4-recycled concrete; 51-peg A; 52-peg B; 6-epoxy glue layer; 7-fixing the base; 8-a nut; 9-ground beam.
Detailed Description
The technical solution of the present invention is further described below, but the scope of the claimed invention is not limited to the described.
See fig. 1-5.
The invention relates to a method for reinforcing a concrete column, which comprises the following steps:
scabbling: chiseling the peripheral surface of the original concrete layer 1, brushing a new and old concrete interface treating agent, and firmly connecting the original concrete layer 1 and the recycled concrete 4 under the action of the new and old concrete interface treating agent, so that the problem that the stress of the joint surface between the original concrete layer and the recycled concrete cannot be coordinated with each other is solved;
fixing the shell: steel pipes 3 are sleeved around the original concrete layer 1, the steel pipes 3 are formed by welding curled steel plates, and the steel pipes 3 have the following functions: firstly, the recycled concrete 4 is supported when being recycled; secondly, the whole body is supported, and meanwhile, the recycled concrete 4 is prevented from being in hard contact with the outside;
pouring: fresh concrete is poured from the upper part of the circular steel tube 3 and is compacted by vibration, mechanical vibration or manual vibration can be carried out, and the top of the recycled concrete 4 at the top is flush with the top of the circular steel tube 3;
surface treatment: polishing and derusting the surface of the circular steel tube 3, then wiping the surface, coating an epoxy glue layer 6 on the surface of the steel tube 3 after drying, winding and wrapping the carbon fiber composite cloth 2 on the surface of the circular steel tube 3 in an annular mode, and under the action of the carbon fiber composite cloth 2 and the epoxy glue layer 6, preventing the outer portion of the steel tube 3 from being exposed in the air to rust, and prolonging the reinforcing reliability and service life of the steel tube 3;
and (5) maintenance: and (3) curing the integral concrete column for at least 28 days at the temperature of 20 +/-2 ℃ by pouring with tap water, so as to ensure that the strength of the new mixed soil layer 4 meets the requirement.
The steel pipe 3 bottom outside is closely installed unable adjustment base 7, and unable adjustment base 7's inner circle is cavity, and unable adjustment base 7's inner circle side and 3 bottoms in close contact with of steel pipe, unable adjustment base 7 through nut 8 and ground roof beam 9 fixed connection to improve steel pipe 3's stability, convenient dismantlement.
In the scabbling step, a plurality of studs A51 are implanted into the outer periphery of the original concrete layer 1, a plurality of studs B52 are welded to the inner periphery of the steel tube 3 in the shell fixing step, and after the pouring of the fresh concrete is completed, the studs A51 and the studs B52 are positioned in the regenerated concrete 4, so that the bonding force between the original concrete layer 1 and the regenerated concrete 4 is enhanced, and the bonding force between the contact surfaces of the original concrete layer 1 and the regenerated concrete 4 is further improved.
The studs A51 and the studs B52 are distributed in a staggered manner on the axis in a radial collinear manner, so that the firmness of the connection of the original concrete layer 1 and the recycled concrete 4 is improved.
The top of the steel pipe 3 is connected with a beam at the top through a bolt, so that the stability of the steel pipe 3 is improved.
In the step of chisel hair, the degree of depth of chisel hair is 10mm, for guaranteeing original concrete layer 1 with recycled concrete 4 be connected more firmly, avoid simultaneously causing the damage to the stirrup and the vertical muscle of 1 inner structure of original concrete layer.
In the roughening step, the interface treatment agent for the new and old concrete is coated into two layers, the first layer of coating is mainly used for wetting the joint surface of the new and old concrete, and the second layer of coating is used for ensuring the dosage of the interface treatment agent, and if too much dosage is used, part of roughened surfaces can be filled, so that the roughening effect is influenced.
In the step that the shell is fixed, unable adjustment base 7's thickness is 50mm, and 8 quantity of nuts are no less than 4, improve and fix a position steel pipe 3's position.
In the step of fixing the shell, the clearance between the circular steel tube 3 and the concrete column 1 is more than or equal to 60mm, so that the recycled concrete 4 can be poured and vibrated conveniently.
Claims (9)
1. A method of reinforcing a concrete column, comprising the steps of:
scabbling: roughening the peripheral surface of the original concrete layer (1), and then brushing a new and old concrete interface treating agent;
fixing the shell: sleeving steel pipes (3) around the original concrete layer (1);
pouring: fresh concrete is poured from the upper part of the circular steel tube (3) and is vibrated to be dense, and mechanical vibration or manual vibration can be carried out;
surface treatment: polishing and derusting the surface of the circular steel tube 3, then wiping the surface, coating an epoxy glue layer 6 on the surface of the steel tube 3 after drying, and winding and wrapping the carbon fiber composite cloth 2 on the surface of the circular steel tube 3 in an annular manner;
and (5) maintenance: the monolithic concrete column was maintained at a temperature of 20 + -2 deg.C for at least 28 days by pouring with tap water.
2. A method of reinforcing a concrete column according to claim 1, characterized in that: a fixing base (7) is tightly installed on the outer side of the bottom of the steel pipe (3), an inner ring of the fixing base (7) is hollow, the side face of the inner ring of the fixing base (7) is in tight contact with the bottom of the steel pipe (3), and the fixing base (7) is fixedly connected with a ground beam (9) through a nut (8).
3. A method of reinforcing a concrete column according to claim 1, characterized in that: in the scabbling step, a plurality of studs A (51) are implanted into the outer periphery of the original concrete layer (1), and a plurality of studs B (52) are welded to the inner periphery of the steel pipe (3) in the shell fixing step.
4. A method of reinforcing a concrete column according to claim 3, characterized in that: the pegs A (51) and the pegs B (52) are distributed in a staggered mode on the axis in a radial collinear mode.
5. A method of reinforcing a concrete column according to claim 1, characterized in that: the top of the steel pipe (3) is connected with a beam at the top through a bolt.
6. A method of reinforcing a concrete column according to claim 1, characterized in that: in the roughening step, the depth of the roughening was 10 mm.
7. A method of reinforcing a concrete column according to claim 1, characterized in that: in the roughening step, the new and old concrete interface treating agents are coated into two layers.
8. A method of reinforcing a concrete column according to claim 1, characterized in that: in the step of shell fixing, the thickness of the fixed base (7) is 50mm, and the number of the nuts (8) is not less than 4.
9. A method of reinforcing a concrete column according to claim 1, characterized in that: in the step of fixing the shell, the clearance between the circular steel tube (3) and the concrete column (1) is more than or equal to 60 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911149318.5A CN110905227A (en) | 2019-11-21 | 2019-11-21 | Method for reinforcing concrete column |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911149318.5A CN110905227A (en) | 2019-11-21 | 2019-11-21 | Method for reinforcing concrete column |
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| CN110905227A true CN110905227A (en) | 2020-03-24 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392541A (en) * | 2011-11-15 | 2012-03-28 | 安徽工业大学 | Method for reinforcing concrete column by utilizing PVC-FRP (Poly Vinyl Chloride-Fiberglass Reinforced Plastic) pipe |
| CN104005567A (en) * | 2014-05-07 | 2014-08-27 | 北京工业大学 | Ultra-high-performance concrete reinforced concrete column with fiber reinforced polymers wound around steel pipe |
| CN203821877U (en) * | 2014-04-23 | 2014-09-10 | 安徽城建检测科技有限公司 | Concrete column reinforcement device |
| CN105442864A (en) * | 2015-12-30 | 2016-03-30 | 武汉大学 | Local reinforcing method of circular reinforced concrete column |
| CN110284726A (en) * | 2019-06-28 | 2019-09-27 | 中国一冶集团有限公司 | The reinforced construction method of concrete frame trestle |
-
2019
- 2019-11-21 CN CN201911149318.5A patent/CN110905227A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102392541A (en) * | 2011-11-15 | 2012-03-28 | 安徽工业大学 | Method for reinforcing concrete column by utilizing PVC-FRP (Poly Vinyl Chloride-Fiberglass Reinforced Plastic) pipe |
| CN203821877U (en) * | 2014-04-23 | 2014-09-10 | 安徽城建检测科技有限公司 | Concrete column reinforcement device |
| CN104005567A (en) * | 2014-05-07 | 2014-08-27 | 北京工业大学 | Ultra-high-performance concrete reinforced concrete column with fiber reinforced polymers wound around steel pipe |
| CN105442864A (en) * | 2015-12-30 | 2016-03-30 | 武汉大学 | Local reinforcing method of circular reinforced concrete column |
| CN110284726A (en) * | 2019-06-28 | 2019-09-27 | 中国一冶集团有限公司 | The reinforced construction method of concrete frame trestle |
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Application publication date: 20200324 |