摘要
边坡稳定性分析的重要任务是确定边坡潜在滑面的位置及相应的安全系数,鉴于坡体位移可在现场监测中直接得到,提出边坡潜在滑面确定的位移判据,采用大变形有限元首先计算出边坡的位移场,然后在开挖面的不同高度作塑性区内的水平位移参考线,依次连接参考线上的位移突变点即得到边坡失稳的潜在滑面位置,分析滑面上的应力以及岩体抗剪强度即得到边坡的整体安全系数。
One of the most important tasks in the stability study of excavating slope is how to determinate the potential sllp surface. Thinking of the displacement is easy to get in the engineering, we put forward using the displacement criterion to determinate the slope slip surface. Firstly, calculate displacement field using large deformation FEM, secondly, make some horizon displacement reference line on the working plane in the plastic zone, then, find out the accident point of displacement on the reference line. When these points are joined by a line progressively, the potential slip surface is found. So, the stress on the surface can be get, and the safety factor of the slope can be gain by analyses the stress and the shear strength of the rock.
出处
《山地学报》
CSCD
北大核心
2006年第1期101-104,共4页
Mountain Research
基金
社会公益研究专项基金资助项目(2001DIB20113)~~
关键词
开挖边坡
潜在滑面
位移判据
数值计算
边坡稳定性分析
excavation slope
slip surface
displacement criterion
numerical calculation
stability analysis of slope
