Renovation and expansion projects often face the reinforcement of existing bridges.Taking a high-speed renovation and expansion project in Zhejiang as a case,this paper first analyzes the reasons for the insufficient bend-ing bearing capacity,shear bearing capacity and local loading and bearing capacity.Then,based on the basic prin-ciples of their respective bearing capacity and the requirements of specifications,it analyzes common reinforcement methods and introduces the principles of each reinforcement method.Finally,combined with the actual character-istics of the project,it introduces the used methods and reinforcement effects.The results indicate that adopting ap-propriate reinforcement methods can effectively solve the structural problems of urban highway bridges and ensure their long-term safe operation.This study provides strong support for the sustainable development of urban infra-structure.
关键词
小箱梁/抗弯承载能力/抗剪承载能力/桥梁工程/加固原理
Key words
Small box girder/Flexural bearing capacity/Shear bearing capacity/Bridge engineering/Reinforce-ment principle
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