基坑软土强度变化特征及坑底施工安全控制  

Analysis on Strength Change of Soil Body of Soft Clay Pit and Safety Control for the Pit Bottom Construction

作　　者：秦爱芳[1] 刘绍峰[1] 胡中雄[2] 

机构地区：[1]上海大学土木系,上海200072 [2]同济大学地下系,上海200092

出　　处：《地下空间》2003年第1期40-44,共5页Underground Space

基　　金：上海市发展基金课题

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.

关 键 词：基坑 软土地区 卸荷状态 强度 坑底 施工 安全控制 

分 类 号：TU753.1[建筑科学—建筑技术科学]