旋转非对称边坡三维安全系数计算  

Computation of 3D safety factor of asymmetric and rotational slopes

作　　者：朱大勇[1] 丁秀丽[2] 杜俊慧 邓建辉[4] 

机构地区：[1]合肥工业大学土木建筑工程学院,安徽合肥230009 [2]长江科学院水利部岩土力学与工程重点实验室,湖北武汉430019 [3]长江勘测规划设计研究院,湖北武汉430010 [4]四川大学水利水电学院,四川成都610065

出　　处：《岩土工程学报》2007年第8期1236-1239,共4页Chinese Journal of Geotechnical Engineering

基　　金：国家自然科学基金资助项目(40472138)

摘　　要：基于滑面正应力修正模式,推导出旋转非对称边坡三维极限平衡安全系数显式解答。首先假设三维滑面正应力的初始分布,然后乘以含2个待定参数的修正函数;根据滑体竖直方向力平衡、垂直滑动方向水平力平衡及对旋转轴力矩平衡的条件,导出关于安全系数的2次代数方程;得到三维安全系数的显式解。本方法不需考虑条柱间具体作用力,满足主要平衡条件,计算过程简单,可应用于实际边坡工程。Based upon modification of the normal stresses over the slip surface, the explicit limit equilibrium solution was derived for the 3D safety factor of asymmetric and rotational slopes. The normal stresses over the 3D failure surface were initially assumed and then multiplied by a modification function involving two factors to be determined. According to equilibrium conditions of vertical force, horizontal force perpendicular to the sliding direction and moment about rotational axis a quadratic equation in terms of the safety factor and then the explicit solution for the 3D safety factor of asymmetric slopes were obtained. In the present method the interaction between the columns was neglected, while the main equilibrium conditions were satisfied, and the computation process of this method was straightforward. This method could be applied for the stability evaluation in practical slope engineering.

关 键 词：边坡稳定 三维极限平衡 安全系数 显式解 非对称边坡 

分 类 号：TU43[建筑科学—岩土工程]