Method for repairing frost heaving cracking of newly-built concrete beam body

A repair method and concrete technology, applied in bridge maintenance, construction, bridges, etc., can solve the problems of inconsistent appearance and re-frost heave in the reinforcement area, and achieve the effect of ensuring the appearance and color

Inactive Publication Date: 2020-07-28
CHINA RAILWAY BRIDGE SCI RES INST LTD +2
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] The embodiment of the present application provides a repair method for frost heaving and cracking of newly-built concrete beams to solve the problems in the related art that the residual water in the cracks of box girders has the risk of frost heaving again, and the appearance of the reinforced area is inconsistent with the overall appearance of the beam The problem

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  • Method for repairing frost heaving cracking of newly-built concrete beam body
  • Method for repairing frost heaving cracking of newly-built concrete beam body
  • Method for repairing frost heaving cracking of newly-built concrete beam body

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[0037] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, but not all of them. Based on the embodiments in the present application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present application.

[0038] The embodiment of the present application provides a repair method for frost heaving and cracking of newly-built concrete beams, which can solve the problem of the risk of frost heaving and cracking again in newly-built concrete beams after reinforcement, and can also solve the problem of new-build concrete reinforced by existing ...

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Abstract

The invention relates to a repairing method for frost heaving cracking of a newly-built concrete beam body. The repairing method comprises the steps that multiple air holes are formed in the crack trend; dry air is poured into the cracks through the air holes until water spots in the cracks are completely discharged; then a vertical prestressed tendon is tensioned, and after tensioning is completed, a vertical prestressed pipeline is grouted; the cracks are repaired and all air holes are sealed; and a reinforcing structure across the crack is applied to reinforce the beam body. The problem that the beam body cracks due to frost heaving is solved, cracks can be prevented from being developed again in the prestress tensioning process, and the problem that the appearance of a reinforced areais inconsistent with the overall appearance of the beam body is solved. The method is simple and rapid to operate, low in cost, obvious in economic benefit and attractive in reinforcing effect, and the crack resistance and the bearing capacity of the bridge are not affected.

Description

technical field [0001] The application relates to the field of structural reinforcement, in particular to a method for repairing frost heaving and cracking of newly-built concrete beams. Background technique [0002] At present, in severe cold areas, due to the influence of low temperature weather, some newly-built bridges may be suspended due to the impact of the winter break after a certain section of cantilever construction. During the winter break period, due to local quality defects of concrete (not compacted and voids), vertical cracks are prone to appear in the web section of the box girder of continuous girder bridges. In severe cases, vertical cracks even develop to the position of vertical prestressing tendons , especially when the seal of the vertical prestressing system is not good, it will provide conditions for the health water, rainwater, and snow water to enter the vertical pipeline, so that water will flow out of the grout hole of the vertical prestressing p...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01D22/00
CPCE01D22/00
Inventor 曾德礼蔡正东魏剑峰白洪海彭旭民郑舟军罗力军叶敏王文洋柳静张美玲唐家睿
Owner CHINA RAILWAY BRIDGE SCI RES INST LTD
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