台湾软弱岩盘隧道变形预估系统数值模拟研究

Research on numerical simulation of deformation of soft rockmass tunnels in Taiwan

基于大变形分析 ,运用三维有限元方法研究了台湾地区Ⅴ、Ⅵ类岩盘隧道在不同的地应力状态、岩石力学参数和开挖方法下 ,隧道围岩变形、受力与诸计算条件的关系 ,为隧道安全合理设计与施工提供依据。

On the basis of the method of large deformation analysis, the paper carries out a vast amount of 3 D FEM numerical simulation and prediction on the deformation and failure possibility of the rockmasses surrounding the tunnels under various geostress, mechanical parameter and excavating conditions in Taiwan. The rockmasses concerned belong to grade Ⅴ and Ⅵ according to the Taiwan classification system of tunnel's surrounding rockmass. A series of curves that predict the rockmass deformation have been drawn and the conclusion reached is of significance to guiding both designing and constructing of tunnels in future.