PBA工法新建暗挖区间隧道下穿既有线车站二次衬砌施工技术  

CONSTRUCTION TECHNOLOGY OF SECONDARY LINING OF NEWLY-BUILT UNDERCUT SECTION TUNNEL UNDERNEATH EXISTING RAILWAY STATION WITH PBA METHOD

作　　者：黄小平 HUANG Xiao-ping(BCEG Civil Engineering Co.,Ltd.,100015,Beijing,China)

机构地区：[1]北京建工土木工程有限公司,北京100015

出　　处：《建筑技术》2021年第8期909-911,共3页Architecture Technology

摘　　要：北京轨道交通首都机场线西延工程东直门站至北新桥站区间PBA工法隧道下穿既有M2线东直门站。下穿隧道二次衬砌施工中,通过调整施工顺序及工艺,完善重点环节的细部构造,优化下穿段施工方案,使下穿段二衬扣拱完成后未发生明显沉降,表面无渗漏,符合设计要求。The PBA construction method tunnel between Dongzhimen Station and Beixinqiao Station of the West Extension Project of Beijing Metro Capital Airport Line passes through the existing M2 line Dongzhimen Station.In the secondary lining construction of the underpass tunnel,the detailed structure of the key links was improved by adjusting the construction sequence and technology,and the construction scheme of the underpass section was optimized,so that no obvious settlement occurred after completion of the second lining buckle arch of the underpass section,and there was no surface leakage,which meets the design requirements.

关 键 词：PBA工法区间 下穿既有车站 二次衬砌 沉降控制 

分 类 号：TU74[建筑科学—建筑技术科学]