深厚淤泥中多级基坑选型探讨

Study on Selection of Retaining and Protecting for Multi-stage Foundation Pit in Silt

某商务小区基坑项目平面和标高复杂,基坑采用多级支护嵌套组合的形式,各级支护选型除综合采用了土钉墙、桩锚、桩撑、双排桩、双排桩+锚索、重力式挡墙等多种常规支护形式外,还根据多级开挖的特点,创新性地提出了筒体支护模式,并通过基坑监测结果反映出整个支护体系安全可靠,总结了多级基坑支护的特点,为深厚淤泥地区基坑支护设计提供参考。

The foundation pit project of a commercial residential complex plane and elevation,foundation pit using multistage support nested combination form. The selections of retaining and protecting for multi-stage foundation pit contain soil nailing、anchor pile,bracing pile,piles in row,piles in row+ Anchor,cement-soil wall and so on,based on the feature of multi-stage excavation,we put forward the innovative cylinder protecting mode,and prove the cylinder protecting mode safety and reliability through monitoring results of foundation pit.Summarize the feature of retaining and protecting for multi-stage foundation pit in silt,as a reference.