关于桥梁施工过程中安全评估计算方法的浅析

Elementary Analysis on Calculation Method of Safety Evaluation in Bridge Construction Process

浅述了新建同德围南北高架桥下穿既有北环高速广北立交桥[1]施工过程中造成的既有高速公路桥梁的差异沉降和盖梁水平位移的发生及发展。为了确保既有高速公路桥梁的安全运营和更好地控制桥下同德围项目墩台桩基的施工,从数值上对既有高速公路差异沉降和盖梁水平位移的限值进行分析,以便施工单位及时采取相应措施,控制施工风险。

This paper introduces the difference settlement of the existing expressway bridge caused in the construction process of the newly built Tongdewei South- North Elevated Bridge crossing the existing Guangbei Interchange in the North Ring Expressway, and the cause and development of horizontal displacement of bent cap.In order to ensure the safe operation of the existing expressway bridge and better to control the construction of the pier abutment pile foundation of Tongdewei Project under bridge, this paper numerically analyzes the limit values of expressway difference settlement and bent cap horizontal displacement so that the construction units can take the relative measures in time to control construction risk.