某水库岩质边坡三维离散元稳定性分析

Three-dimensional Distinct Element Stability Analysis of a reservoir rock slope

边坡岩体是非均质、各向异性、不连续的复杂介质,由结构面和所围限的结构体组成,结构面常常控制着岩体的稳定性。离散元法将岩体离散为块体单元,单元可以发生变形、移动和分离,可以较为真实地模拟不连续岩体在受结构面控制下发生变形破坏的过程。本文以某边坡为对象,在现场采样基础上,统计分析了优势结构面方位和可能发生的变形破坏模式,采用三维离散元软件3DEC分析了不同工况下的边坡稳定性。

Slope rock mass are heterogeneous,anisotropic,discontinuous,which composed of structural faces and confined structures that often control the stability of the rock mass. The distinct element method disperses the rock mass as a bulk element,and the element can be deformed,moved and separated,which can simulate the process of deformation and failure of the discontinuous rock mass under the control of the structural faces. This paper takes a certain slope as an object,based on the sampling of the site,calculated the orientation of the dominant structural face and the possible deformation failure mode. Te slope stability are analyzed by 3 DEC software under different natural conditions.