分期建设地下室的基坑支护设计与研究

Design and Analysis of Foundation Pit Support for Multi-Period Basement

分期建设基坑工程是解决城市地下空间改造的重要研究课题。开展了分期地下室建设的基坑支护方案研究,通过设计计算及施工表明“分块分隔”的围护方案,能够有效地保证各期基坑开挖的安全。对比分析了先、后期相邻基坑交界面区域支护结构设计的可行性方案。可供类似基坑围护设计时参考。基于分期建设的项目越来越多,建议继续深入研究多期地下室基坑支护优化技术。

Multi-period basement is an important subject for large-scale underground space development.In this paper,a Changjiang Road block foundation pit engineering as the background,to carry out the construction of two basement foundation pit support design research,design unit and the overall calculation showed that the"surrounding+separate"retaining scheme,can effectively guarantee the effective transmission security and support the internal force of the structure of foundation pit excavation,foundation pit structure internal force the overall three-dimensional calculation model of complex plane and the working condition and the deformation calculation has good effect.Limited to"perimeter+separation",it is recommended to continue to study the optimization techniques of foundation pit support in multi-phase basement.