铁路隧道松散破碎围岩塌方数值模拟分析

摘要

运用二维离散元程序UDEC3.1软件,对3种不同顶板岩性组合模型进行数值模拟,再现了隧道顶板岩层离层、弯曲、沉降、开裂直至塌方的全过程,分析了松散破碎围岩隧道塌方后围岩的位移、应力和塑性区分布特征。%Three different lithology association modes are numerical simulated with UDEC3. 1 procedures, which recon-structs the overall process from absciss layer, bend, sedimentation, craze, untill to falling of roof strata. This paper also analysis the displacement, stress, and plastic area distribution of deep soft railway.