基于矢量和法安全系数的边坡稳定性评价  

The Slope Stability Evaluation Based on Vector Sum Analysis Method

作　　者：董立山 宿钟鸣[2] 赵建斌[2] 

机构地区：[1]黄土地区公路建设与养护技术交通行业重点实验室,太原030001 [2]山西省交通科学研究院,太原030001

出　　处：《路基工程》2013年第5期44-47,52,共5页Subgrade Engineering

基　　金：山西省交通建设科技项目(11-2-15)

摘　　要：以边坡的整体稳定性为研究对象,基于矢量和法安全系数k(θ)的边坡稳定性分析,首先确定安全系数的计算方向,在该方向上抗滑力与滑动力比值即为安全系数。该方法评价边坡稳定性时不需引入过多的假设,以显式格式求解,计算过程简便。利用ANSYS软件进行二次开发,利用矢量和法安全系数求解ACADS两道标准考题EX1(a)和EX1(c),得到与考题标准答案非常接近的结果,较边坡计算软件Geo-slope计算结果要小(误差在3%以内),证明了采用矢量和法安全系数评价边坡稳定性是可行的。When studying overall stability of slope, the stability analysis based on the safety factor k （θ） in vector sum analysis method, was carried out in such manner that at first, the calculation direction of the factor was confirmed and then, on this direction, the ratio of sliding resistance to slipping force was the safety factor. This method is simple, providing the solution in explicit format without too many assumptions. With the secondary development by software ANSYS, two ACADS standard examination questions EX1 （a） and （e） were solved by this method, and the results obtained were very close to the standard answers, and less than that from slope calculation software Geo-slope （ with the error within 3 % ） , which shows that it is effective and feasible to evaluate slope stability by the safety factor in vector sum analysis method.

关 键 词：边坡 稳定性评价 矢量和法 安全系数k（θ） 

分 类 号：U416.14[交通运输工程—道路与铁道工程]