软土地区暗挖车站工作井结构设计

Design of Underground Excavated Working Shaft of Station in Soft Soil Region

为了解决地铁车站建设与城市交通拥堵的矛盾,上海市轨道交通14号线静安寺站下穿延安中路段的区域采用了顶管法实施。介绍了静安寺站大断面顶管工作井的结构设计方案,采用了施工支承梁和临时混凝土斜撑的复合壁式框架体系对端墙结构进行了水平托换,解决了施工阶段的水平框架梁和使用阶段的楼板无法结合设置的矛盾,并采用三维有限元分析进行了验证。

In order to solve the contradiction of metro station construction and urban traffic congestion, the pipe-jacking method is adopted in the area under the section of Middle Yanan Road at Jingan Temple Station of Shanghai Metro Line 14. This paper introduces the structural design scheme of the large-section pipe-jacking working shaft at Jingan Temple Station. The composite wall-type frame system of construction supporting beam and temporary concrete diagonal bracing is adopted to carry out the level underpinning of headwall structure in order to solve the contradiction of unable combination and setup of the level frame beam in construction stage and the floor slab in service stage. And 3D finite element analysis is adopted for the verification.