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对某隧道岩层交汇土石交界段隧道开挖与支护的施工过程进行三维有限元数值模拟,对比分析正台阶留核心土法和双侧壁导坑法两种工法施工过程中的围岩应力和隧道周边收敛变形随时间和施工工序的变化规律,从整体上把握隧道施工的效果,找出有利于围岩稳定的最优开挖方案。
Three-dimensional finite element numerical simulation of the construction process of tunnel excavation and support in the intersection of a rock tunnel and the junction of earthwork and rock excavation is carried out. The variation of the surrounding deformation of the tunnel with time and the variation of the construction process grasps the effect of the tunnel construction as a whole to find out the optimal excavation scheme that is conducive to the stability of the surrounding rock.