Replacement structure of existing bracket of cantilever beam bridge and construction method

Abstract

The invention provides a replacement structure of the existing bracket of a cantilever beam bridge and a construction method. The problem of further development of bracket crack diseases can be fundamentally solved, the cost can be saved, and popularization and implementation are facilitated. The replacement structure of the existing bracket of the cantilever beam bridge comprises an upper bracketend with the cantilever beam bridge and a lower bracket end with the cantilever beam bridge, a steel box beam bracket is installed at the lower bracket end through a high-strength pull rod anchoringsystem and anchoring bolts, a support body is installed on the steel box beam bracket, and the support body makes contact with the beam bottom of the upper bracket end and the beam bottom of the lowerbracket end.

Description

technical field [0001] The invention relates to an alternative structure and a construction method for the existing corbel of a cantilever beam bridge, belonging to the technical field of bridge engineering reinforcement. Background technique [0002] At the end of the 20th century, a batch of continuous girder bridges with cantilevers were designed and built. The biggest advantages of this structure are as follows: 1. Reduce the negative bending moment at the pier position, reduce the structural height of the main girder section, and save materials; 2. Reducing the thickness of the cap beam or pier increases the perspective under the bridge. Therefore, this structure was widely used in urban bridge construction at that time. This kind of structure bears the load of the upper girder mainly by setting corbels at the end of the cantilever. However, due to the limitation of conditions, the section of the corbels here is relatively weak, and under various loads such as bending,...

AI Technical Summary

Problems solved by technology

Practice has proved that after the first and second reinforcement methods are implemented, the cracks will still develop further, and the crack disease cannot be solved fundamentally. Although the third method can fundamentally solve the problem, it is affected by the uneven settlement of the site and piers, etc. Due to the limitation of factors, the construction of this method is difficult and the operation cost is high, so it is not conducive to popularization

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