合肥地铁大东门站结构设计创新与应用

Innovation and Application of Structure Design of Dadongmen Railway Station in Hefei Metro

合肥市轨道交通1、2号线在大东门站呈十字交叉。大东门1、2号线均为14 m宽岛式站台,采用T型换乘方式。大东门站为具有临河、超深、异型、地质复杂、紧邻高层、偏载等特点的复杂车站,在此情况下修建地铁车站国内较为罕见。车站设计采用全盖挖逆作法施工,同时采用地下连续墙十字钢板接头、AM基础桩、HPE液压垂直插入钢管柱工法、板墙榫槽连接等新做法。设计时对周边环境采取适当的保护措施并建立了三维有限元模型进行整体分析,分析结果表明,以上新做法可以满足规范及周边环境的使用要求。

Line 1 and Line 2 of Hefei Rail Transportation crisscross in Dadongmen Station. Dadongmen Station for Line 1 and Line 2 are both 14 m wide island platforms, with ＂T＂ transfer mode. Dadongmen is a complicated station. Located near a river and high -rise buildings, the station, with complex geological conditions, is super deep and irregular and of partial load, which makes this sub- way station a rare case in Chinese subway station development. Full covered top-down excavation construction was adopted in the station, and some new methods such as cross steel plate joint, underground continuous wall AM foundation pile, HPE hydraulic ver- tical insertion steel pipe column method, wall mortise connection way are also applied. Appropriate protection measures were adopt- ed in design to protect surrounding environment and a three-dimensional f＇naite element model for overall analysis were established. The FEM results show that it meets the requirements of specification and utilization of the surrounding environment.