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Freeway bridge crack repairing method based on carbon fiber plate

A carbon fiber plate and repair method technology, applied in bridge maintenance, bridge, bridge reinforcement, etc., can solve problems such as self-heavy, increased bridge self-weight, unfavorable ultimate bearing capacity of structures, etc., to improve strength and stiffness, increase safety reserve, Effect of suppressing growth of cracks

Inactive Publication Date: 2018-02-27
SINOHYDRO BEREAU 10 CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Prestressed steel bars, steel strands, and high-strength steel wires increase the self-weight of the bridge, which is not conducive to the ultimate bearing capacity of the structure

Method used

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  • Freeway bridge crack repairing method based on carbon fiber plate
  • Freeway bridge crack repairing method based on carbon fiber plate
  • Freeway bridge crack repairing method based on carbon fiber plate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] The present invention will be further described below in conjunction with specific embodiment:

[0039] Taking the inspection of the bridge at the Luodai Interchange ramp of the Chengan-Yu Expressway as an example, it is found that there are many cracks in the box girder of the D ramp.

[0040] After testing, see the table below for the cracks in the first span of the first section of the D ramp.

[0041]

[0042]

[0043] Oblique cracks: oblique cracks produced by the flange plate of the box girder, generally web shear cracks, mainly appear in the range from the support to L / 4 (L is the length of the beam), and form an angle of 20° to 60° with the roof. The web junction starts to extend down to 1 / 3~1 / 2 beam height, and the direction is basically perpendicular to the main tensile stress, which directly affects the safety and durability of the structure.

[0044] Transverse cracks: Transverse cracks appear in the middle and upper part of the web, and the width is ...

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Abstract

The invention discloses a freeway bridge crack repairing method based on a carbon fiber plate. The method comprises the steps of detecting and specially analyzing a crack; preparing construction materials and construction equipment and building a construction bracket platform; cleaning an opening; implanting and cleaning a bolt and fixing the bolt into the opening through vegetable glue; conducting surface treatment on a concrete member, installing an anchor, installing a fixed-end limiting frame, installing the anchor into the fixed-end limiting frame, installing a tension-end limiting frame,and installing a wedge block so that the bottom of the wedge block is arranged under concrete; fixing the carbon fiber plate to the crack through the anchor. In the method, the pre-stressed carbon fiber plate is adopted to apply external pre-stress on the bottom of a box girder for reinforcement and strengthening, the strength and the stiffness of the structure can be improved, the deflection deformation of the structure can be reduced, and the development of the crack can be restrained; besides, with the combination of a crack sealing treatment measure, the durability of a bridge and the ultimate carrying capacity of the structure can be improved, and the emergency capacity of bridge running can be improved.

Description

technical field [0001] The invention relates to the field of bridges, in particular to a method for repairing cracks in expressway bridges based on carbon fiber plates. Background technique [0002] In the external prestressed reinforcement construction of other bridges, materials such as prestressed steel bars, steel strands, and high-strength steel wires are usually used to offset the internal force generated by external loads on the beam body by applying prestressed stresses, improve its ultimate bearing capacity, and suppress cracks. develop. Prestressed steel bars, steel strands, and high-strength steel wires are self-heavy, which increases the self-weight of the bridge, which is not conducive to the ultimate bearing capacity of the structure. Contents of the invention [0003] The object of the present invention is just to provide a kind of highway bridge crack repairing method based on carbon fiber plate in order to solve the above problems. [0004] The present i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 王利周君波祝林徐鹏潘国庆雷轲方正直罗贵侯圆谭万开王波杨洪柴培林孙亚鹏周冲张永鸿魏峦平罗帅
Owner SINOHYDRO BEREAU 10 CO LTD
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