砂土地质条件下顶管施工对既有区间隧道影响分析

Study on the Deformation Influence of Pipe Jacking Construction Impact on Existed Urban Rail Transit

通过FLAC3D模拟供水管道与区间隧道交叉段的顶管施工过程,研究供水管道顶管施工对既有区间隧道的影响。模拟结果认为施工引起的隧道变形以及裂缝控制均在允许的范围之内,不会影响轨道交通正常运营。

In order to study the effect of pipe jacking construction on the existing interval tunnel, the process of pipe-jacking of cross section of water pipe and interval tunnel is simulated by means of FLAC3D software. The simulation results show that the tunnel deformation and fracture caused by pipe jacking construction are within allowable limits, which will not affect the normal operation of rail transit.