桥梁跨浅埋高铁隧道安全预控分析

Analysis on Safety and Pre-control of Bridge Across Shallow-buried High-speed Railway Tunnel

在铁路线路保护区内,市政桥梁跨越既有高速铁路浅埋隧道,会对高铁隧道产生较大影响,易引起隧道及轨道变形,进而影响到高速铁路列车安全运营,因此有必要在施工前开展安全评价。通过模拟预控安全计算模型,分析桥梁桩基础施工扰动和桥梁上部结构施工荷载对高速铁路隧道结构的影响,确保新建市政桥梁施工不影响隧道正常运营。研究方法及结论可为今后类似工程提供参考与借鉴。

In the railway line protection zone,the implementation of municipal bridges crossing high-speed railways with existing shallow-buried tunnels will have a greater impact on high-speed railway tunnels,which is easy to cause the defomiation of tunnels and tracks,and then affect the safe operation of high-speed railway trains.Therefore,it is necessary to carry out safety evaluation before construction.By simulating the pre-control safety calculation model,the paper analyzed the iniluence of the bridge pile foundation construction disturbance and the bridge superstructure construction load on the structure of the high-speed railway tunnel,so as to ensure that the construction of the newly-built municipal bridge will not affect the normal operation of the tunnel.The research results provide a reference for similar projects in the future.