深基坑开挖过程中土的性状及围护墙体安全度分析

The Behaviour Change of Soil and the Safty Degree Analysis of Enclosure Wall during the Excavation of Deep Foundation Pits

本文以室内试验和现场测试成果为基础，分析了深基坑开挖大面积卸荷时坑底被动区土体性状的变化，在传统方法的基础上研究了诸多坑底扰动因素（不能及时浇筑大面积底板垫层及砼坑底土暴露时间过长等）对围护墙体安全度的不利影响，并探讨了相应的工程措施．

Through simulated indoors tests and site tests this paper investigate the behaviour change of basal soil and influence deepness during massive unloading, the unfavorable influence of the basal soil disturbance factor on the safty degree of the enclosure wall and the relative engineering measurements.