摘要
位于重庆市区的某不稳定斜坡,其变形区范围内拟进行大规模基坑开挖,为保证安全施工,必须准确评价斜坡的稳定性。在现场调查、归纳地质环境条件的基础上,对不稳定斜坡进行变形监测,研究斜坡变形特征;采用FLAC-3D有限差分软件进行数值模拟分析,将结果与实际变形监测曲线进行对比、拟合,得到监测点的位移情况,从而准确了解不稳定斜坡的变形情况;最后基于极限平衡法和FLAC-3D强度折减法对不稳定斜坡天然状况以及基坑开挖工况下的稳定性进行评价。
The unstable slope is located in the cantonal of Chongqing City, where large foundation excavation will be carried out in the influenced scope. Analysis on stability must be taken for construction safety. On the basis of previous studies, combined with field investigation, the geological environment of this study area is summarized. By analyzing the measured monitoring data, the displacement characteristics of the monitoring point is studied. To know the deformation of unstable slopes, FLAC-3D numerical simulation is adopted to obtain soil parameters by the comparison of monitoring curves and numerical results. Finally, based on limit equilibrium theory and strength reduction method , the evaluation results of stability are studied for natural state of unstable slopes and excavation.
出处
《地质力学学报》
CSCD
2011年第4期402-409,共8页
Journal of Geomechanics
关键词
不稳定斜坡
变形监测
强度折减法
数值模拟
稳定性分析
unstable slope
deformation monitoring
strength reduction method
numerical simulation
analysis on stability
