基于双导洞PBA法的城市轨道交通地下暗挖车站施工技术  

CONSTRUCTION TECHNOLOGY OF UNDERGROUND EXCAVATION STATIONS FOR URBANRAIL TRANSIT BASED ON DOUBLE GUIDE TUNNEL PBA METHOD

作　　者：李引雄 LI Yin-xiong(China Railway 7th Bureau Group Xi'an Railway Engineering Co.,Ltd.,710015,Xi'an,China)

机构地区：[1]中铁七局集团西安铁路工程有限公司,西安710015

出　　处：《建筑技术》2025年第7期857-862,共6页Architecture Technology

摘　　要：地铁暗挖车站PBA两导洞施工工法是在地面不具备车站围护开挖条件或地铁车站埋置过深、采取明挖法超深基坑安全不可控的情况下采取的一种地铁暗挖施工措施。该工艺是将明挖施工方法和暗挖法进行有机结合的一种施工方法。采用在地下先进行导洞暗挖施工,并在导洞内施作围护边桩、桩顶冠梁等围护结构,使桩、冠梁、顶拱一起构成支撑体系,以承受施工过程中的外部荷载。然后在拱和边桩的防护下,施作内部结构,再形成由外部初期支护结构和二次衬砌组合而成的车站体系的施工方法。目前在北京、上海、广州、深圳及西安等城市繁华地段应用较多。The PBA two guide tunnel construction method for subway underground excavation stations is a subway underground excavation construction measure adopted in situations where the ground does not have the conditions for station enclosure excavation or the subway station is buried too deep,and the safety of the ultra deep foundation pit cannot be controlled by the open excavation method.This technology is a construction method that combines open excavation and hidden excavation methods organically.The underground excavation of the guide tunnel is carried out first,and enclosure structures such as edge piles and top beams are constructed inside the guide tunnel,so that the piles,top beams,and arch together form a support system to withstand external loads during the construction process.Then,under the protection of arches and side piles,an internal structure is constructed to form a station system consisting of an external initial support structure and a secondary lining combination.Currently,it is widely used in bustling areas of cities such as Beijing,Shanghai,Guangzhou,Shenzhen,and Xi'an.

关 键 词：双导洞 轨道交通 暗挖车站 PBA技术 

分 类 号：TU74[建筑科学—建筑技术科学]