不同假定对边坡安全系数计算的影响分析  

A Comparative Study on Effects of Different Assumptions on the Calculation of Factor of Safety of Slopes

作　　者：褚雪松[1] 李亮[1] 于广明[1] 

机构地区：[1]青岛理工大学土木工程学院,青岛260033

出　　处：《石河子大学学报（自然科学版）》2009年第3期341-344,共4页Journal of Shihezi University(Natural Science)

基　　金：国家自然科学基金项目(50874064);山东省自然科学基金重点项目(Z2007F10)

摘　　要：基于滑面正应力假定,可以很方便地得到给定滑动面的安全系数,但不同的滑面正应力假定对结果的影响值得研究。本文通过随机模拟方法,给出了不同滑面正应力假定下安全系数的分布,并对给定的多个滑动面,经计算比较了该方法与不平衡推力法的误差大小。分析结果表明:给定滑动面愈接近临界滑动面,其结果误差愈小;对任意给定的滑动面,误差可高达900%以上。The factor of safety for given slip surface can be obtained easily by assuming the normal stress along the slip surface base and solving the statistic equilibrium equations for the whole sliding body. This method is characterized by no iteration and easy convergence. However, the effect of different assumptions of normal stress on the results of given slip surface has not been reported. The stochastic method is used in this paper to generate different assumptions of normal stress along the slip surface base, and the results related to different assumptions can be calculated. It can be summarized that the nearer to the critical slip surface, the smaller the difference. For some slip surfaces, the difference can be up to 900%.

关 键 词：边坡稳定 极限平衡 安全系数 滑面正应力假定 条间力假定 

分 类 号：TU458.3[建筑科学—岩土工程]