浅埋暗挖隧道施工对既有桥梁安全影响分析

ANALYSIS OF IMPACT OF SHALLOW BURIED TUNNELS ON SAFETY OF EXISTING BRIDGES

针对浅埋暗挖大断面市政隧道在上软下硬不均匀地层中开挖引起的邻近桥墩桩基变形和内力变化进行详细分析,从工程实用的角度分析桩基在正常使用极限状态下的使用效应。结合实际案例,采用数值有限元分析方法,对比现场实测数据,总结出了一定的响应规律及研究方法。

In this paper, a detailed analysis of the pile foundation deformation and internal force changes of adjacent bridge piers caused by the excavation of a shallow buried and concealed largesection municipal tunnel in the upper soft and lower hard uneven ground is carried out. From the engineering practical point of view, the analysis of the pile foundation under the limit state of normal use In combination with actual cases, the numerical finite element analysis method is used to compare on-site measured data, and certain response laws and research methods are summarized for engineering cases.