摘要
以试验为基础 ,分析了软土地区深基坑开挖时 ,坑底被动区土体强度变化特征及坑底土体卸荷后滞留对其强度的影响。并结合工程通过分析施工阶段坑底土体暴露及扰动等不利因素对围护墙体安全度的影响 ,提出了应对坑底施工的安全控制 。
In this paper, based on the experiment results, the characteristics of strength change of the soil in passive area and the effect of its retaining on the strength during excavation of foundation pit in soft clay area were analyzed. The influence of some disadvantages, such as soil exposure, disturbance after its unloading, on safety degree of the enclosure wall in a project during construction of the pit was analyzed and a proposal for safety control of the pit bottom work is offered. The results may be helpful to the foundation pit engineering work.
出处
《地下空间》
CSCD
2003年第1期40-44,共5页
Underground Space
基金
上海市发展基金课题
关键词
基坑
软土地区
卸荷状态
强度
坑底
施工
安全控制
soft clay area, unloading state
strength change
pit bottom work
safety control
