摘要
北京地铁首都机场线二期(西延)工程全线采用非降水暗挖法施工,其中北新桥站采用PBA暗挖法施工,小导洞采用注浆止水,经多种方案比选决定,该车站四周围护结构首次采取洞内咬合桩止水。施工实践证明,咬合桩咬合严密,止水效果良好。
Beijing capital airport subway line phase II(west extension)adopted non-dewatering subsurface excavation method along the whole line.PBA subsurface excavation method was adopted in construction of Beixinqiao station and grouting water-stop method was used for small guide hole.After comparison among different construction methods,it was determined to adopt in-hole secant pile water-stop method for the first time for the enclosure structure of the station.The construction practice showed that the secant pile is tight and favorable water-stop effect was realized.
作者
张东
李春茂
孙青龙
王伟
ZHANG Dong;LI Chun-mao;SUN Qing-long;WANG Wei(Beijing Construction Engineering Group Co.,Ltd.,100055,Beijing,China)
出处
《建筑技术》
2020年第7期782-785,共4页
Architecture Technology
关键词
地铁暗挖车站
不降水施工
咬合桩
subsurface excavation subway station
non-dewatering construction
secant pile
