单滑动面岩质边坡数值计算影响因素分析  

Influencing Factors Analysis of Numerical Calculation for Rocky Slope with Single Sliding Surface

作　　者：戴妙林[1] 黄天成[1] 张胤[1] 钱赟[1] 匡义[2] 

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]惠州市华禹水利水电工程勘测设计有限公司,广东惠州516001

出　　处：《水电能源科学》2011年第2期79-81,共3页Water Resources and Power

摘　　要：介绍了确定边坡稳定安全系数和判别边坡临界稳定状态的方法。为便于强度折减法与刚体极限平衡法进行比较,以典型单滑动面边坡数值计算为例,比较分析了滑动面材料屈服准则、自重应力场施加方法、计算模型单元网格尺寸和边界范围对边坡稳定安全系数的影响规律,提出了数值模拟建议,以提高已知滑动面岩质边坡数值计算的精度。结果表明,强度折减法较为合理,超载法在特殊情况下可能无法得到安全系数。A method of determining the stability factor of safety and discriminating the critical stability state for slopes is presented.In order to facilitate comparing the strength reduction method with the limit equilibrium method of rigid body,a typical slope with a single sliding surface is chosen to analyze the influence of yield criteria of sliding surface material,exerted methods of self-weight,element size and the scope of model boundary.Some suggestions of the numerical simulation are presented to improve the precision of numerical calculation.The results show that the strength reduction method is reasonable while overload method can not probably obtain safety factor in some special circumstances.

关 键 词：岩质边坡 安全系数 FLAC3D 滑动面 强度折减法 

分 类 号：TU457[建筑科学—岩土工程]