Construction method for repairing bridge padstone defects

Abstract

The invention discloses a construction method for repairing bridge padstone defects. The method comprises a cover beam, a defect padstone, a support and a main beam. The defect padstone is installed at a top of the cover beam, the support is installed at the top of the defect padstone, and the top of the support abuts against the bottom of the main beam. The construction method specifically comprises the following construction steps: arranging a temporary support; chiseling off a defect part of a defect padstone; drilling a steel bar embedding hole; embedding a steel bar; encapsulating the padstone; injecting high-strength shrinkage-free slurry and maintaining; and finally removing the temporary support to finish repair construction. According to the construction method for repairing the bridge padstone defects, a whole repairing process can be completed without jacking a main beam or dismounting a support system. And the construction process is simplified so that other adverse factorsinfluencing the bridge structure due to jacking of the main beam and dismounting of the support system are avoided. Moreover, by adopting the method to repair the padstone, the construction method issimple and convenient, a safety coefficient is good, and a repair effect is reliable.

Description

technical field [0001] The invention relates to the technical field of bridge engineering construction, in particular to a construction method for repairing defects of bridge pad stones. Background technique [0002] The pad stone is an important component of the bridge structure, which plays a role of connecting the preceding and the following for the transmission of bridge loads. The pad stone structure bears all the loads above the support, but the size of the pad stone structure is much smaller than other bridge structures, and the reinforcement ratio is relatively low, resulting in stress concentration of the pad stone structure. Under the long-term effect of the bridge structure load and the upper traffic load, the pad stone structure is prone to quality defects such as cracks, missing edges and corners, and uneven stress, which will lead to loss or damage of the use function of the pad stone, and even cause the overall quality of the bridge. security incident. There...

AI Technical Summary

Problems solved by technology

Due to the narrow working surface, the difficulty of high-altitude operation, and the unsatisfactory repair effect of the traditional pad stone defect repair process, it is usually necessary to lift the upper structure and remove the support system before repairing the pad stone. The construction is difficult and the construction cost is relatively high. high

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