顶管施工对地表和电力隧道变形影响的三维有限元分析

Three Dimensional Finite Element Analysis of Influence of Pipe Jacking Construction on Ground Surface and Cable Tunnel Deformation

在城市轨道交通换乘通道、市政过街通道等工程中,面对搬迁难度较大的重要地下管线时,大断面矩形顶管施工技术为其提供了可靠的工法。通过对顶管施工过程的三维有限元模拟,探讨了土体位移特征,分析了对下方垂直相交的电力隧道的变形影响,得出了一些结论,可为顶管施工提供借鉴。

Large section rectangular pipe jacking technology provides a reliable method for construction of urban rail transit transfer passages and street crossing passages where there are underground pipelines difficult to be relocated.Through the three-dimensional finite element simulation of pipe jacking construction process,the characteristics of ground displacement is studied,and some conclusions come up with the analysis of the influence on the deformation of the cable tunnel perpendicular to the above pipe jacked passage,which provides reference for pipe jacking construction.