边坡稳定的离散元强度折减法分析  

Slope Stability Analysis by Strength Reduction Based on Distinct Element Method

作　　者：孔不凡[1,2] 阮怀宁[1,2] 朱珍德[1,2] 袁文军[1,2] 陈振振[1,2] 

机构地区：[1]河海大学岩土力学与堤坝工程教育部重点实验室,江苏南京210098 [2]河海大学岩土工程科学研究所,江苏南京210098

出　　处：《人民黄河》2013年第4期120-123,共4页Yellow River

基　　金：国家重点基础研究发展规划项目(2011CB013504);国家自然科学基金资助项目(41272329)

摘　　要：分析边坡稳定性的传统方法主要有极限平衡法和有限元法,传统的极限平衡法无法获得节理岩质边坡的滑动面与稳定安全系数,有限元法对节理岩质边坡的稳定分析需要设置节理单元,而离散单元法能真实地表达节理岩体的几何特征,便于处理非线性变形和破坏都集中在节理面上的岩体破坏问题,因此可以更好地模拟边坡的稳定状况。将离散元法与强度折减法结合,分别对土质边坡和含结构面的岩质边坡的稳定性进行了算例分析,结果表明离散元强度折减法在岩土体边坡稳定分析方面具有潜在的优越性,是节理岩质边坡稳定性分析的可行、有效的方法。The traditional methods of analysis of slope stability primarily include limit equilibrium method and the finite element method. The tradi- tional limit equilibrium method is unable to obtain the sliding surface of the jointed rock slope stability safety factor, and the finite elenment method for jointed rock slope stability analysis needs to set the jointed unit. The discrete element method can truly express the geometric characteristics of jointed rock mass, and be easy to handle the problem of rock mass destruction about nonlinear deformation and destruction that are concentrated in the joints surface, so it can better simulate the slope stability conditions. The stability of soil and the jointed rock slopes were analyzed by means of the universal distinct element code （UDEC） combined with the strength reduction methed. The results show that the discrete element strength reduction method has potential advantages in the slop stability analysis and it is a feasible and effective method for Jointed rock slone stability analvsis.

关 键 词：边坡稳定分析 离散元法 强度折减法 极限平衡法 有限元法 

分 类 号：TV223[水利工程—水工结构工程]