高速公路改扩建中的小桥利用验算及拼宽设计

DISCUSSION ON THE UTILIZATION VERIFICATION AND WIDENING DESIGN OF SMALL BRIDGES IN THE RENOVATION AND EXPANSION OF HIGHWAYS

既有小桥的拼宽利用是高速公路改扩建设计中的难点之一,以2022年扩容建成通车的G0512线成都至乐山高速公路中6m、8m小桥的改扩建设计为工程实例,详细论述了6m、8m小桥的利用验算及拼宽利用设计,对高速扩容项目中的小桥拼宽利用处理提出了具体看法和建议,希望为高速公路改扩建项目提供一定的参考。

The widening and utilization of existing small bridges is one of the difficulties in the design of highway renovation and expansion.This article takes the renovation and expansion design of the 6 m,8 m small bridges on the Chengdu Leshan Expressway of the G0512 line,which will be expanded and opened to traffic in 2022,as an engineering example to discuss in detail the utilization verification and widening utilization design of the 6 m,8 m small bridges.Specific opinions and suggestions are proposed for the widening and utilization treatment of small bridges in high-speed expansion projects,hoping to provide some reference for highway renovation and expansion projects.