两种强度折减法确定边坡稳定系数适用性探讨  

Discussion on applicability of two kinds of strength reduction methods for determining the slope stability factor

作　　者：刘海波[1] 齐宏伟[1] 林大超[1] 范丽萍[2] 

机构地区：[1]华北科技学院土木工程系,北京东燕郊101601 [2]北京科技大学土木与环境工程学院,北京100083

出　　处：《地震工程与工程振动》2010年第5期162-166,共5页Earthquake Engineering and Engineering Dynamics

基　　金："十一五"国家科技支撑计划课题(2007BAB18B01)

摘　　要：强度折减法确定边坡稳定性系数比传统极限平衡方法优势明显,但是两种常用的强度折减法哪种更适合一直存在争议。本文针对某工程算例分别采用两种强度折减法进行了边坡稳定性系数计算,并把计算结果和传统极限平衡方法进行了对比,结果表明快速拉格朗日分析法更适合应用在边坡稳定性系数确定方面。该法的计算结果和传统计算方法极其接近,并可以克服传统方法人为指定滑动面的重大缺点。The strength reduction method for determining slope stability factor has its unique advantages over conventional limit equilibrium method. However, in the two common strength reduction methods, which one is more suitable has always been controversial. In this paper, the two strength reduction methods are adopted for calculating the slope stability factor of an engineering example, and the calculation result is compared with the result calculated by using the traditional limit equilibrium methods. It shows that the fast Lagrangian analysis method is more suitable for determining the slope stability factor. The calculation result of this method is approximate to that of the traditional calculation method, and it can overcome the fundamental shortcoming of the traditional method that the sliding surface needs to be artificially specified.

关 键 词：边坡 稳定系数 强度折减法 快速拉格朗日法 有限元 

分 类 号：TU94[建筑科学—建筑技术科学]