摘要
基于强度折减法,将空间问题简化为平面轴对称问题,利用有限元方法对圆形基坑的稳定性问题进行了分析。讨论了影响基坑稳定性的主要因素,特别是由于水头差导致的土体渗流对基坑稳定性的影响。分析表明:考虑渗流因素后,安全系数明显减小,随围护墙体插入深度的增加稳定性增强,而渗透系数和界面强度参数对稳定性均有影响。
Based on strength reduction method, simplified the space problem as plane axisymmetric problem, the finite element method is used to evaluate the base stability of circular foundation pit. The main influence factors of stability of foundation pit are discussed, especially the influence of seepage induced from head differ- ence. The analysis indicates that when the seepage is taken into account the safety factor decreases obviously, the base stability of circular foundation pit significantly enhanced with increasing depth of enclosure walls inserted into the soft clay layer, both the permeability coefficient and the strength parameters of interface have effect on the stability.
出处
《勘察科学技术》
2007年第4期6-10,共5页
Site Investigation Science and Technology
关键词
强度折减法
基坑开挖
渗流
安全系数
稳定性
strength reduction method
foundation pit excavation
seepage
safety factor
stability
