中文摘要：

软弱土地基下的深基坑工程具有较强的不确定性和综合性,其支护结构和围护结构的效应经常由各种因素综合影 响而难以准确计算及测量.围绕软土深基坑工程的围护结构效应问题,根据在不同理论分析方法下对基坑开挖各个施工 工况下围护结构的变形和弯矩进行分析,并引用正在开挖的一起软土深基坑工程案例,介绍基坑开挖过程中变形和弯矩的 大小以及分布状态,通过与该工程的实际监测数据进行对比,得出基坑开挖不同工况下围护结构效应的相关特点,并强调 对于软弱土地基的基坑工程需通过多种计算分析手段进行多重复核的观点,并以此结果来指导、预测以及评价基坑工程的 变形和内力情况以及安全性等.

英文摘要：

The effects of the supporting and retaining structure of deep foundation pit engineering in soft soil foundation is difficult to be calculated and measured accurately, with its uncertainty and complexity. According to the analysis under different theoretical methods for various excavation procedures, this paper proposed the deformation and bending moment effects of the supporting structure, through a big soft ground deep excavation project, which is under construction. Together there was a comparison study with the site monitoring data. The structure characteristics in different excavation conditions were studied. The paper emphasized that the calculation of the deep foundation pit in soft ground needs to be analyzed through comprehensive methods and calculated, with different professional software programs. The results of this paper can be used as a guide, to forecast the deforma-tion and internal forces, as well as the evaluation of safety and excavation projects.