Method of reinforcing concrete bridge by prestressed steel plates

A concrete and prestressed technology, applied in bridges, bridge materials, bridge maintenance, etc., can solve problems such as bearing capacity decline, unbearable bearing capacity of road bridges, cracks, etc., to improve strength and bearing capacity, prolong service life, and operate The effect of simple method

Inactive Publication Date: 2015-01-28
GEOTECHN TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of the economy, the increasingly busy traffic load has made the bearing capacity of roads, especially various bridges, unbearable; on the other hand, many bridges currently have large or small cracks due to factors such as vehicle overloading. directly lead to a decrease in bearing capacity

Method used

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  • Method of reinforcing concrete bridge by prestressed steel plates
  • Method of reinforcing concrete bridge by prestressed steel plates
  • Method of reinforcing concrete bridge by prestressed steel plates

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The box girder of the concrete bridge is reinforced with prestressed steel plates to prevent the expansion of cracks on the box girder.

[0043] 1) According to the requirements of design drawings and on-site measurement and positioning, a large sample is released on the concrete surface of the box girder to be pasted with steel plates, and the depth is chiseled to about 7 mm; then the surface laitance is removed with a wire brush, and the loose matter on the surface is removed, and finally oil-free Blow off the surface dust with compressed air, and wipe the surface with absorbent cotton dipped in acetone.

[0044] 2) Determine the position to be drilled according to the design drawings, and then drill the hole; use compressed air to clean the floating dust in the hole, then clean it with acetone, and pour two-thirds of the hole deep structural glue into the hole; clean the screw with acetone, and then install Anchor screw.

[0045] 3) According to the actual lofting o...

Embodiment 2

[0054] Prestressed steel plates are used to strengthen the two box girders of the concrete bridge to prevent the expansion of the gap between the box girders.

[0055] 1) According to the requirements of the design drawings and on-site measurement and positioning, place a large sample on the surface of the concrete to be reinforced with steel plates, chisel to a depth of about 5 mm; then use a wire brush to remove the floating slurry on the surface, remove loose objects on the surface, and finally rinse with water, wait Wipe the surface with absorbent cotton dampened with acetone after it is completely dry.

[0056] 2) Determine the position to be drilled according to the design drawings, and then drill the hole; use compressed air to clean the floating dust in the hole, then clean it with acetone, and pour two-thirds of the hole deep structural glue into the hole; clean the screw with acetone, and then install Anchor screw.

[0057] 3) According to the actual lofting on the co...

Embodiment 3

[0066] The box girder of the concrete bridge is reinforced with prestressed steel plates to prevent the increase of cracks on the box girder.

[0067] 1) According to the requirements of the design drawings and on-site measurement and positioning, a large sample is released on the concrete surface of the box girder to be pasted with steel plates, and the depth is chiseled to about 6mm; then the surface laitance is removed with a wire brush, and the loose matter on the surface is removed, and finally an oil-free Blow off the surface dust with compressed air, and wipe the surface with absorbent cotton dipped in acetone.

[0068] 2) Determine the position to be drilled according to the design drawings, and then drill the hole; use compressed air to clean the floating dust in the hole, then clean it with acetone, and pour two-thirds of the hole deep structural glue into the hole; clean the screw with acetone, and then install Anchor screw.

[0069] 3) According to the actual loft...

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Abstract

The invention relates to a method of reinforcing a concrete bridge by prestressed steel plates, and aims to achieve the effects that the bearing capacity of the bridge reinforced by the method is effectively improved, the service life is prolonged, and the method has the characteristics of simplicity in operation and lower cost. The technical scheme is that the method of reinforcing the concrete bridge by the prestressed steel plates is implemented according to the following steps of 1, performing concrete surface treatment; 2, boring and embedding screws; 3, according to the positions of the embedded screws and calculated expansion coefficients, boring the steel plates to be pasted in a matching way, and then descaling and roughening the to-be-pasted faces of the steel plates; 4, heating and fixing the steel plates; 5, pasting the steel plates; 7, performing surface antiseptic treatment on the steel plates.

Description

technical field [0001] The invention relates to a construction method, in particular to a method for reinforcing bridges with prestressed steel plates. Background technique [0002] With the rapid development of the economy, the increasingly busy traffic load has made the bearing capacity of roads, especially bridges, unbearable; on the other hand, many bridges have cracks, large or small, due to factors such as vehicle overloading. directly lead to a decrease in bearing capacity. Therefore, what reinforcement measures to take to maintain or even increase the bearing capacity of existing bridges is a research topic for many bridge researchers. Contents of the invention [0003] The technical problem to be solved by the present invention is to overcome the shortcomings of the above-mentioned background technology and provide a method for strengthening bridges. The bridge strengthened by this method can effectively improve the bearing capacity and prolong the service life, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00E01D101/32
CPCE01D22/00E01D2101/32
Inventor 潘金龙殷树芳
Owner GEOTECHN TECH
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