地铁北新桥站外挂厅盖挖法结构砂卵石地层物理力学性质及内力计算

Physical and Mechanical Properties and Internal Force Calculation of Structural Sandy Cobble Stratum by Hanging Hall Cover Excavation Method at Metro Beixinqiao Station

当前城市地下空间开发的重要性越发凸显,对地铁建设中的地铁车站结构设计要求也越来越高。文章以北京地铁机场线北新桥站为例,通过试验证明了砂卵石地层的力学不稳定特性及磨蚀性,提出了砂卵石地层车站的施工难点,最后通过midas Civil软件计算内力情况并验证施工结构设计优化的准确性,为以后相似地层车站结构设计提供参考。

At present,the importance of urban underground space development is becoming more and more prominent,and the requirements for the structural design of subway stations in subway construction are also getting higher and higher.Taking Beixinqiao Station of Beijing Metro Airport Line as an example,the mechanical instability and abrasion of sandy cobble stratum are proved by experiments,and the construction difficulties of sandy cobble stratum station are put forward.Finally,the internal force is calculated by midas Civil software and the accuracy of construction structure design optimization is verified,which provides references for the structural design of similar stratum stations in the future.