Concrete column wrapping steel plate reinforcing method

Abstract

The invention discloses a method for reinforcing a concrete column wrapped with a steel plate. The method sequentially comprises the steps of positioning and paying off, concrete surface treatment, anchor bolt hole drilling, steel plate on-site lofting, steel plate machining, wrapped steel welding, anchor bolt planting and structural adhesive pouring. The construction period can be shortened, the construction cost is reduced, and the construction safety coefficient is high.

Description

Technical Field

[0001] The invention relates to the field of concrete column reinforcement methods, in particular to a concrete column steel plate reinforcement method. Background Art

[0002] With the promotion, application and development of construction engineering renovation and reinforcement technology, the application scope of renovation and reinforcement is becoming wider and wider. In addition to ordinary public office buildings, factories, hotels, exhibition halls, gymnasiums and many other aspects, super high-rise buildings, large public buildings, etc. are also increasingly using reinforced structures, especially some structures that increase building space.

[0003] Generally, the reinforcement and reconstruction of concrete structures during their use phase is a traditional industry that was born with the emergence of concrete structures. As time goes by, concrete structures may crack, deform, or even break. Therefore, it is particularly important to adopt effective reinforcement techniques for buildings at this time. Among them, the use of steel-concrete structure reinforcement can preserve the original structure as much as possible while reducing construction costs and preserving the original architectural style and characteristics to the greatest extent. During the production and installation of steel plate reinforcement projects, steel plate reinforcement is used to strengthen the structural force, thereby improving construction efficiency and quality standards. Summary of the invention

[0004] The invention provides a method for reinforcing a concrete column wrapped with a steel plate, which solves the technical problem of complex stress-bearing construction of the existing structure.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is: A method for reinforcing a concrete column by enclosing a steel plate comprises the following steps: Step 1: Select the concrete column to be reinforced, measure the reinforcement elevation of the concrete column with a level meter according to the design elevation of the concrete column, mark the bolt position on the reinforced column and prepare for embedding, circle the bolt position on the concrete column and use a steel bar detector to detect the position of the steel bar inside the concrete column, and finally position and lay out according to the drawing; Step 2: Drill holes on the surface of the concrete column according to the position of the steel bars detected by the steel bar detector. Stagger the steel bars when drilling, and grind the surface of the concrete column until the embedded steel bars inside the concrete column are exposed. Clean the concrete debris base generated on the surface of the concrete column when drilling. Step 3: Use an impact hammer to drill holes according to the bolt positions determined on the concrete column. After the holes are formed, use compressed air to clean the holes. After blowing away the dust in the holes, inject the anchor glue to bond with the concrete.

[0006] Step 4: Lay out horizontal and vertical control lines on the surface of the original concrete column according to the dimensions on the drawing, weld the positioning frame with angle steel on the column surface of the concrete column, and then cover the positioning steel frame with plexiglass plates. Measure the net dimensions of the four sides of the positioning keel and the spacing of the anchor holes on all concrete columns. Remove the marked plexiglass plates and punch bolt holes on the wood board at a ratio of 1:1. Then install the wood board on the positioning steel frame to perform secondary correction of bolt punching to eliminate positioning deviation. Finally, number the four sides of the concrete column, record one component in one table, and use CAD software to draw the processing drawing of the steel plate anchor hole position. Step 5: Prepare the model and specification of the steel plate and lay it out on the steel plate at a ratio of 1:1 on the wood board. According to the drawings, mark the assembly mark, bolt hole mark, position and direction of the reinforcement plate, tilt mark and center line, reference line and inspection line on the concrete column, and then punch the bolt holes on the steel plate; Step 6. The thickness of the steel plate used for steel welding is 20-35mm. All welding places need to be cut at a 30° angle. The semi-automatic laser cutting machine is used to cut the groove. The steel plate is welded by full penetration submerged arc welding. Considering that the steel plate is thick, the welded steel plate should be heated with a blowtorch before welding. The temperature measured by the temperature gun should reach about 150°C, and then multiple layered welding should be started; Step 7: Plant anchor bolts in the original concrete column anchor bolt holes. First, drill holes according to the hole position, hole diameter, and hole depth required by the design. Use a hair dryer and a brush to clean the anchor bolt holes until there is no floating dust or water stains on the inner wall of the hole. The steel bars must be straight. Before planting the anchor bolts, the original steel bars should be derusted, and the derusting length should be greater than the planting length. Step 8: Use epoxy mortar to seal the steel plate, angle steel, etc., leaving vent holes, and make grouting nozzles at locations that are conducive to grouting, with a spacing of 2 to 3 meters. After the grouting nozzles are firmly glued, use pressure to pressurize the epoxy resin slurry from the grouting nozzles; when slurry appears in the vent holes, stop pressurizing, plug the holes with epoxy mortar, and then maintain a low pressure for more than 10 minutes before stopping grouting.

[0007] Furthermore, step 3 specifically includes the following steps: 1): Drilling anchor holes, laying out the bolt positions according to the positioning, and using a steel bar detector to detect the positions of the steel bars, staggering the steel bars when drilling; 2): According to the characteristics of this project, first drill the hole, and then plant the anchor bolt after the column head steel plate is welded. After the hole is cleaned, the hole mouth needs to be blocked to prevent dust from entering and concrete carbonization; 3): The installation method of the drilled anchor hole is to load the hose into a special injection gun, tighten the mixing nozzle, pump out the initial incompletely mixed colloid, and slowly screw the bolt in one direction to ensure that it reaches the bottom of the hole.

[0008] Furthermore, step 4 specifically includes the following steps: welding a positioning frame with angle steel on the original concrete column surface, then covering the positioning steel frame with a plexiglass plate, measuring the net dimensions of the four sides of the frame positioning keel and the spacing of all anchor holes, removing the marked plexiglass plate, punching bolt holes on the wood board at a 1:1 ratio, and then installing the wood board on the positioning steel frame for a second bolt punching.

[0009] Furthermore, in step 8, it is characterized in that the four sides of the concrete column are designed identically, and the size of the steel plate is the same as the size of the reinforced position of the concrete column.

[0010] Compared with the prior art, the present invention has the following advantages: The present invention provides an installation method for reinforcing concrete columns and beams with steel plates. A single 35mm thick steel plate weighing about 1 ton is used. Holes are made and cut with an angle of ≥30°. A semi-automatic laser cutting machine is used to cut grooves. The steel plates are welded by full-penetration submerged arc welding. Considering that the steel plates are relatively thick, a blowtorch is used to heat the welded steel plates before welding. The temperature measured by a temperature gun is about 150°C, and multiple layered welding is started. The operation has high technical requirements, and materials and components can be easily transported vertically and horizontally, which can shorten the construction period, reduce the construction cost, have a high construction safety factor, and easily ensure the construction quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 The present invention is a flow chart of the installation method of reinforcing concrete columns and beams with steel plates.

[0012] Figure 2 It is a schematic diagram of steel plate processing in the installation method of the concrete column beam reinforced with steel plate of the present invention.

[0013] Figure 3 It is a schematic diagram of the installation of the steel plate reinforced concrete column beam of the present invention.

[0014] Figure 4 It is a schematic diagram of the steel plate-wrapped concrete column of the present invention.

[0015] Figure 5 It is a schematic diagram of the concrete column and beam lofting steel plate of the present invention. Figure 6 It is a schematic diagram of welding steel plates by full penetration submerged arc welding of the present invention.

[0016] Explanation of the numbers in the figure: 1-steel plate anchor hole, 2-35 thick steel plate, 3-clad steel, 4-concrete column, 5-bolt hole, 6-bolt, 7-1 steel plate, 7-2 steel plate, 8 full fusion welding DETAILED DESCRIPTION

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] like Figure 1-Figure 5 As shown, this embodiment discloses a method for reinforcing a concrete column wrapped with a steel plate, comprising the following steps: Step 1: Select the concrete column to be reinforced, measure the reinforcement elevation of the concrete column with a level meter according to the design elevation of the concrete column, mark the bolt position on the reinforced column and prepare for embedding, circle the bolt position on the concrete column and use a steel bar detector to detect the position of the steel bar inside the concrete column, and finally position and lay out according to the drawing; Step 2: Drill holes on the surface of the concrete column according to the position of the steel bars detected by the steel bar detector. Stagger the steel bars when drilling, and grind the surface of the concrete column until the embedded steel bars inside the concrete column are exposed. Clean the concrete debris base generated on the surface of the concrete column when drilling. Step 3: Use an impact hammer to drill holes according to the bolt positions determined on the concrete column. After the holes are formed, use compressed air to clean the holes. After blowing away the dust in the holes, inject the anchor glue to bond with the concrete.

[0019] Step 4: Lay out horizontal and vertical control lines on the surface of the original concrete column according to the dimensions on the drawing, weld the positioning frame with angle steel on the column surface of the concrete column, and then cover the positioning steel frame with plexiglass plates. Measure the net dimensions of the four sides of the positioning keel and the spacing of the anchor holes on all concrete columns. Remove the marked plexiglass plates and punch bolt holes on the wood board at a ratio of 1:1. Then install the wood board on the positioning steel frame to perform secondary correction of bolt punching to eliminate positioning deviation. Finally, number the four sides of the concrete column, record one component in one table, and use CAD software to draw the processing drawing of the steel plate anchor hole position. Step 5: Prepare the model and specification of the steel plate and lay it out on the steel plate at a ratio of 1:1 on the wood board. According to the drawings, mark the assembly mark, bolt hole mark, position and direction of the reinforcement plate, tilt mark and center line, reference line and inspection line on the concrete column, and then punch the bolt holes on the steel plate; Step 6. The thickness of the steel plate used for steel welding is 20-35mm. All welding places need to be cut at a 30° angle. The semi-automatic laser cutting machine is used to cut the groove. The steel plate is welded by full penetration submerged arc welding. Considering that the steel plate is thick, the welded steel plate should be heated with a blowtorch before welding. The temperature measured by the temperature gun should reach about 150°C, and then multiple layered welding should be started; Step 7: Plant anchor bolts in the original concrete column anchor bolt holes. First, drill holes according to the hole position, hole diameter, and hole depth required by the design. Use a hair dryer and a brush to clean the anchor bolt holes until there is no floating dust or water stains on the inner wall of the hole. The steel bars must be straight. Before planting the anchor bolts, the original steel bars should be derusted, and the derusting length should be greater than the planting length. Step 8: Use epoxy mortar to seal the steel plate, angle steel, etc., leaving vent holes, and make grouting nozzles at locations that are conducive to grouting, with a spacing of 2 to 3 meters. After the grouting nozzles are firmly glued, use pressure to pressurize the epoxy resin slurry from the grouting nozzles; when slurry appears in the vent holes, stop pressurizing, plug the holes with epoxy mortar, and then maintain a low pressure for more than 10 minutes before stopping grouting.

[0020] Step 3 specifically includes the following steps: 1): Drilling anchor holes, laying out the bolt positions according to the positioning, and using a steel bar detector to detect the positions of the steel bars, staggering the steel bars when drilling; 2): According to the characteristics of this project, first drill the hole, and then plant the anchor bolt after the column head steel plate is welded. After the hole is cleaned, the hole mouth needs to be blocked to prevent dust from entering and concrete carbonization; 3): The installation method of the drilled anchor hole is to load the hose into a special injection gun, tighten the mixing nozzle, pump out the initial incompletely mixed colloid, and slowly screw the bolt in one direction to ensure that it reaches the bottom of the hole.

[0021] Step 4 specifically includes the following steps: welding a positioning frame with angle steel on the original concrete column surface, then covering the positioning steel frame with a plexiglass plate, measuring the net dimensions of the four sides of the frame positioning keel and the spacing of all anchor holes, removing the marked plexiglass plate, punching bolt holes on the wood board at a 1:1 ratio, and then installing the wood board on the positioning steel frame for a second bolt punching.

[0022] The design of the four sides of the concrete column is the same, and the size of the steel plate is the same as the size of the reinforced position of the concrete column.

[0023] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. The embodiments described in the present invention are merely descriptions of the preferred embodiments of the present invention, and do not limit the concept and scope of the present invention. The various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction, and such combinations should also be regarded as the contents disclosed in the present disclosure as long as they do not violate the concept of the present invention. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0024] The present invention is not limited to the specific details of the above-mentioned embodiments. Within the technical concept of the present invention and without departing from the design concept of the present invention, various modifications and improvements made to the technical solution of the present invention by technical personnel in this field should fall within the protection scope of the present invention. The technical contents for which protection is sought in the present invention have been fully recorded in the claims.

Claims

1. A method for reinforcing a concrete column by enclosing a steel plate, characterized in that: The following steps are involved: Step 1: Select the concrete column to be reinforced, measure the reinforcement elevation of the concrete column with a level meter according to the design elevation of the concrete column, mark the bolt position on the reinforced column and prepare for embedding, circle the bolt position on the concrete column and use a steel bar detector to detect the position of the steel bar inside the concrete column, and finally position and lay out according to the drawing; Step 2: Drill holes on the surface of the concrete column according to the position of the steel bars detected by the steel bar detector. Stagger the steel bars when drilling, and grind the surface of the concrete column until the embedded steel bars inside the concrete column are exposed. Clean the concrete debris base generated on the surface of the concrete column when drilling. Step 3: Use an impact hammer to drill holes according to the bolt positions determined on the concrete column. After the holes are formed, use compressed air to clean the holes. After blowing away the dust in the holes, inject the anchor glue to bond with the concrete. Step 4: Lay out horizontal and vertical control lines on the surface of the original concrete column according to the dimensions on the drawing, weld the positioning frame with angle steel on the column surface of the concrete column, and then cover the positioning steel frame with plexiglass plates. Measure the net dimensions of the four sides of the positioning keel and the spacing of the anchor holes on all concrete columns. Remove the marked plexiglass plates and punch bolt holes on the wood board at a ratio of 1:

1. Then install the wood board on the positioning steel frame to perform secondary correction of bolt punching to eliminate positioning deviation. Finally, number the four sides of the concrete column, record one component in one table, and use CAD software to draw the processing drawing of the steel plate anchor hole position. Step 5: Prepare the model and specification of the steel plate and lay it out on the steel plate at a ratio of 1:1 on the wood board. According to the drawings, mark the assembly mark, bolt hole mark, position and direction of the reinforcement plate, tilt mark and center line, reference line and inspection line on the concrete column, and then punch the bolt holes on the steel plate; Step 6. The thickness of the steel plate used for steel welding is 20-35mm. All welding places need to be cut at a 30° angle. The semi-automatic laser cutting machine is used to cut the groove. The steel plate is welded by full penetration submerged arc welding. Considering that the steel plate is thick, the welded steel plate should be heated with a blowtorch before welding. The temperature measured by the temperature gun should reach about 150°C, and then multiple layered welding should be started; Step 7: Plant anchor bolts in the original concrete column anchor bolt holes. First, drill holes according to the hole position, hole diameter, and hole depth required by the design. Use a hair dryer and a brush to clean the anchor bolt holes until there is no floating dust or water stains on the inner wall of the hole. The steel bars must be straight. Before planting the anchor bolts, the original steel bars should be derusted, and the derusting length should be greater than the planting length. Step 8: Use epoxy mortar to seal the steel plate, angle steel, etc., leaving vent holes, and make grouting nozzles at locations that are conducive to grouting, with a spacing of 2 to 3 meters. After the grouting nozzles are firmly glued, use pressure to pressurize the epoxy resin slurry from the grouting nozzles; when slurry appears in the vent holes, stop pressurizing, plug the holes with epoxy mortar, and then maintain a low pressure for more than 10 minutes before stopping grouting.

2. A method for reinforcing a concrete column with a steel plate according to claim 1, characterized in that: Step 3 specifically includes the following steps: 1): Drilling anchor holes, laying out the bolt positions according to the positioning, and using a steel bar detector to detect the positions of the steel bars, staggering the steel bars when drilling; 2): According to the characteristics of this project, first drill the hole, and then plant the anchor bolt after the column head steel plate is welded. After the hole is cleaned, the hole mouth needs to be blocked to prevent dust from entering and concrete carbonization; 3): The installation method of the drilled anchor hole is to load the hose into a special injection gun, tighten the mixing nozzle, pump out the initial incompletely mixed colloid, and slowly screw the bolt in one direction to ensure that it reaches the bottom of the hole.

3. A method for reinforcing a concrete column with steel plate according to claim 1, characterized in that: The step 4 specifically includes the following steps: welding a positioning frame with angle steel on the original concrete column surface, then covering the positioning steel frame with a plexiglass plate, measuring the net dimensions of the four sides of the frame positioning keel and the spacing of all anchor holes, removing the marked plexiglass plate, punching bolt holes on the wood board at a 1:1 ratio, and then installing the wood board on the positioning steel frame for a second bolt punching.

4. A method for reinforcing a concrete column with steel plate according to claim 1, characterized in that: The design of the four sides of the concrete column is the same, and the size of the steel plate is the same as the size of the reinforced position of the concrete column.

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