苏州轨道交通1号线深基坑围护结构设计的思考

Design Idea for Deep Excavation Bracing Structure in No.1 Line of Suzhou Trace Transport

苏州轨道交通1号线工程的实施给苏州地区深基坑的设计与施工带来了新的课题与尝试,本文介绍了1号线地铁深基坑围护结构的设计方案,并根据1号线地铁深基坑实施过程中监测信息的反馈,总结了各种深基坑围护结构的优缺点及在本地区的适用情况;对粉性土层的分、合算原则,地基加固的选用及围护结构的入土比的规定均做出了有益的尝试,为后续工程设计提出了建议。

The implementation of No. 1 line of Suzhou subway project has brought the new topic and attempt to the design and construction of deep foundation pit. Here, the design of the deep excavation bracing structure for No. 1 line of Suzhou subway project is introduced in detail. The advantages and disadvantages as welt as the application of brace structures for deep excavation in Suzhou region are summarized according to the feedback of monitoring information. At the same time, the useful attempts are made for the principle to calculate the water and earth pressures of silt soil separately and together, the selection of foundation reinforcement and the penetration ratio of brace structure, so as to put forword some suggestions for the following design of deep excavation bracing structures.