大型综合地铁换乘车站施工对周围环境影响分析

由于地铁平行换乘车站基坑周围环境的特殊性,其周围位移场分布和围护结构变形与一般基坑明显不同,找出其中的规律对于设计中确定该类基坑的保护等级、施工过程中保护临近已建地铁车站及周围建筑的安全显然具有重要的意义。依托地铁重大综合工程,根据现场的监测数据,结合有限元计算,分析了地铁基坑周围环境位移场的分布特点,并对已建车站结构的变形和内力分布进行了分析,可为同类工程的设计和施工参考。

Study on surround ground movement caused by deep excavation of exchanging subway station

The development and extension of the railway induce vary kinds of exchanging types.The parallel station is one of them.The soil layer movement and the deformation of the diagram wall have their own characteristics which are different from the common excavation.All these are very important for defining the protect grads and protecting the near tunning station and building.Based on the measure data of a great parallel metro-station construction in Shanghai,the law of the surrounding soil movement and the deformation and inerter stress of the running station structure are studied,which can provide references for the designing,construction and research in similar engineering.