某基坑施工对地铁五号线的保护措施

Protection Measures for the Subway Line 5 in the process of one Foundation Pit Excavation

基坑开挖施工在地铁五号线采取了如下保护措施:对地铁隧道正上方的结构采用大梁托换的方法;采用分段开挖及恢复水位时分段回压;在水位恢复前用堆载预压,最后采用分层卸载。这些措施有效地保护了地铁五号线的正常运行。

The following protection measures are taken for subway line 5 in the process of foundation pit excavation.Underpinning beam is used on the top of the tunnel;excavate in sections and return the press by different sections when water level recovers;prepare the press before the water level recovers.And finally the unload way is adopted by laying.These measures keep subway line 5 in normal operation.