基于有限元重度增加法计算边坡稳定系数  

Slope stability analyses based on gravity increase with finite element method

作　　者：柏亚双[1] 张文圣[1] 朱德滨[1] 徐国林[1] 夏冰华[1] 

机构地区：[1]西南林业大学土木工程学院,云南昆明650224

出　　处：《世界地震工程》2011年第3期146-150,共5页World Earthquake Engineering

基　　金：省级森林工程特色专业项目(501035);省级结构工程实验教学示范中心项目(501042);校级森林工程重点学科项目(47002801)

摘　　要：近年来,有限元分析方法在边坡稳定分析中的应用日益广泛,其具体方法分为强度折减法与重度增加法。与强度折减法相比,重度增加法在边坡平缓或者土体摩擦角较大时,很难得到边坡的稳定系数。文中对重度增加法进行改进,采用调整重度增加法的土体剪切屈服强度进行边坡稳定性分析,通过算例对比改进后方法与强度折减法计算得到稳定系数差别。进一步进行了实际工程算例分析,并与规范方法计算结果进行对比,验证文中方法在实际工程应用中具有可行性。in recent years, Finite element method （ FEM ） has been extensively applied to the stability analysis of slopes ,and it consists two specific methods, namely strength reduction method （SRM） and gravity increase method （GIM）. Comparing with the SRM, the GIM is difficult to obtain the factor of safety for a slope with small slope inclination or high friction angles of soil. In this paper, the GIM is modified by adjusting yield shear strength of soil in calculaton. The analytical examples are given to show the differences between factors of safety obtained by SRM and the modified GIM. The modified GIM is applied to an example involving Engineering Practice, and compared with Method of specification. It is concluded from the study that the modified GIM is of applicability and flexibility.

关 键 词：有限元 重度增加法 边坡稳定 

分 类 号：TU375[建筑科学—结构工程] P315.96[天文地球—地震学]