北京地铁某车站盖挖逆筑法施工技术

Cover and Cut-Top Down Construction Technology in Beijing Metro Station

盖挖车站依据土建结构浇注顺序的不同,通常可以采用盖挖顺筑法、半逆筑法和逆筑法3种施工方法。北京地铁某车站3号基坑由于管线改移及交通疏解等原因采用盖挖逆筑法施工,文章对盖挖逆筑法施工进行了系统阐述和总结,包括盖挖逆筑法施工流程、基坑围护结构施工、主体结构施工、地表沉降监测、施工质量控制等。

Pouring sequence for cover excavation of station civil structure is different, so 3 kinds of construction methods usually can be used, namely the cover and cut-bottom up, semi cover and cut-top down and cover and cut-top down. Due to pipeline change and relocation and traffic organization and other reasons in a Beijing metro station, the cover and cut-top down for the pit No.3 is used. This paper made systematic description and summary of the cover excavation reverse construction method, including the cover and cut-top down construction process, construction of foundation pit retaining structure, main structure construction, surface subsidence monitoring, and construction quality control etc.