某城市地铁车站围护结构变形特性分析

Study on deformation characteristics of a city subway station retaining structure

为研究不同内支撑体系约束情况下围护结构变形情况,依托某城市地铁1号线典型地铁车站明挖基坑施工过程及监测数据分析,对比了不同内支撑体系约束下围护结构的变形情况。研究结果表明,提高第一道支撑的刚度,有利于控制围护结构顶部变形;围护结构最大变形值与顶部变形值之比随第一道支撑刚度增大而增大。

To study the deformation characteristics of retaining structure in different constraint conditions,the construction process and monitoring data analysis has been done based on a typical subway station metro line 1 digging foundation pit,and the comparison of the deformation of retaining structure under the restriction of the support system in different situations was carried out.The research results show that,the improvement of the first line of support stiffness is helpful to control the deformation of retaining structure on the top,palisade structure ratio of the maximum deformation and the deformation of the top value as the first line of support stiffness increases.