邻地铁深基坑的优化设计及施工

Optimal Design and Construction of Deep Foundation Pit Adjacent to Metro

针对紧邻城市道路或地铁线路的基坑施工时,环境保护要求高,且需在保证地铁正常运营的同时,实现基坑快速安全施工的难题,对邻地铁深基坑的设计方案进行了优化。结合工程实际,重点介绍了邻地铁深大基坑在围护形式及布局方面的优化,以及“分区开挖,先撑后挖”的施工技术,为类似工程提供了经验参考。

In view of the high environmental protection requirements of foundation pit construction adjacent to urban roads or metro lines,and the problem of realizing rapid and safe construction of foundation pit while ensuring the normal operation of metro,the design scheme of deep foundation pit adjacent to metro is optimized.Combined with the engineering practice,this paper mainly introduces the optimization of the retaining form and layout of the deep and large foundation pit adjacent to metro,as well as the construction technology of"zoning excavation,supporting before excavation",which provides experience reference for similar projects.