大型地下车站洞室结构设计施工技术

红旗河沟车站是重庆轻轨3号线与地铁6号线的地下换乘车站,也是当前全亚洲建设规模最大的地下暗挖车站.依托该工程,介绍了大型浅埋暗挖洞室主体结构设计方法、支护衬砌设计与施工技术,包括洞群组成、主洞与附属洞的衔接方式、埋置深度确定、主洞断面设计、高边墙式大断面主洞开挖工法、支护类型等；着重研究了十字交叉节点的结构设计方法,并采用有限元方法进行了结构受力特征分析与开挖过程施工力学计算.通过施工过程的力学分析与精细化设计,红旗河沟车站成功建成,相关设计施工方法对今后类似超大型地下洞室工程具有一定参考价值.

Design and Construction Technology for a Large Underground Station Structure

The Hongqihegou Station is the underground interchange station connecting line 3 of the light rail and line 6 of the subway in Chongqing.It is almost the largest bored station in Asia.Based on this station,this paper addresses the design of the major structure,support,lining and construction technologies used for the large shallow underground cavern,including the tunnel group composing,the joining mode of the main tunnel and accessorial excavations,the buried depth determination,the design of the main tunnel section,excavation methods and support of the main tunnel with a large section and high sidewall.The paper specifically examines the structural design of the cross point of the light rail line 3 and subway line 6.Moreover,the finite element method was used to analyze the force features and carry out mechanical calculations.Using the above technologies,the Hongqihegou station was accomplished successfully.