数值模拟软夹层对基岩上覆土层破裂的影响

Numerically Simulate the Response Complexion of the Overlaying Soil with Soft Interlayer Due to Fault Bedrock Dislocation

摘要: 为了了解软夹层对基岩上覆土层破裂的影响,确定土层的破裂范围,采用平面应变有限元法,模拟了有软夹层的上覆土层在断层错动时的破裂过程.从模拟的结果看出,软夹层对上覆土层破裂有一定的阻碍作用;当软弱层埋置较深时,一旦上覆土层破裂,失效土体的范围较大;软弱夹层的厚薄对上覆土层的破裂进程和破裂范围也有影响.

Abstract: To know the rupture course and rupture range,we simulated the process of rupture on the overlaying soil with soft interlayer by plane strain finite element method in this paper.Resultsshow that the overlying soil with a soft interlayer can obstruct the rupture failure from bedrock up to the earth's surface,however,a soft interlayer which is deeply buried,will bring about a wider range of the earth's surface rupture failure;In addition,the thickness of the soft interlayer may have effects on the rupture course of the overlying soil.