岩土力学2012，Vol.33Issue(12)：3741-3746,6.
边坡滑面正应力构成及分布模式选择
Selection of constitution and distribution model of normal stresses over slip surface of slope
摘要
Abstract
The method of slope stability analysis based on the assumption distribution of normal stresses over the slip surface is a progress of limit equilibrium theory. To obtain a reliable safety factor, it is essential to analyze the composition and assumption pattern of normal stresses over slip surface of slope which are dependent upon the body and inter-slice forces. Examples are given to analyze the distribution and contribution components of normal stresses over the slip surface under different assumptions of inter-slice forces. The results show that: Contribution component of slide body forces (including slope external forces) is dominant; and inter-slice forces are smaller contribution component. The safety factor is insensitive to the distribution of normal stresses over the slip surface. So, it is not necessary to demand for the accordance between assumption normal stresses distribution and real normal stresses distribution over the slip surface. Then, the assumption distribution of normal stresses over the slip surface could constitute by the contribution component of body forces, chosen as the kernel function, and the contribution component of inter-slice forces which could be approximated by a modifying function with two undetermined parameters. The research results have disciplined the assumption patterns of normal stresses, and have practical and theoretical value.关键词
边坡/滑面/正应力/极限平衡/安全系数/构成/分布Key words
slope/ slip surface/ normal stress/ limit equilibrium/ safety factor/ constitution/ distribution分类
建筑与水利引用本文复制引用
卢坤林,朱大勇,杨扬..边坡滑面正应力构成及分布模式选择[J].岩土力学,2012,33(12):3741-3746,6.基金项目
国家自然基金资助项目(No.51078123,No.51179043). （No.51078123,No.51179043）
