软土地区既有地铁车站地下结构改造  

Reconstruction of Existing Metro Station Structure in Soft Soil Ground

作　　者：张立明[1] 郭一斌[2] 赵超颖 苏烨[1] 

机构地区：[1]天津市地下铁道集团有限公司,天津300000 [2]郑州航空工业管理学院土木工程学院,郑州450015 [3]天津环通电子工程有限公司,天津300457

出　　处：《都市快轨交通》2015年第3期105-108,119,共5页Urban Rapid Rail Transit

基　　金：天津市建委科技项目(2014-9)

摘　　要：基于天津地铁既有车站结构改造工程,对大型地铁车站地下结构的改造方案进行研究。提出沿车站长度方向隔跨跳仓改造、沿深度方向自上而下分层改造的方案。在地下车站结构改造过程中,采用三维数值模拟分析既有地下车站结构、新设置的地下连续墙的内力与变形,在此基础上对改造方案进行了优化。改造工程实施效果良好,实测的变形与数值模拟吻合较好。A method for large underground structure reconstruction is analyzed by using an existing metro station structure recon- struction project as a case. The sequence construction method is put forward for reconstruction along the station length direction and layered method is suggested to construct the new structure from top to bottom along the depth direction. Three dimensional fi- nite element simulations are performed to predict the stress and deformation of the existing structure and the reconstruction scheme with new underground continuous wall. The reconstruction scheme is optimized by the numerical simulation. Field observation and measurement show that the existing structure remains safe and the deformation yielded during reconstruction match quite well with the predicted values.

关 键 词：城市轨道交通 软土 地下结构 车站改造 数值模拟 

分 类 号：U231.3[交通运输工程—道路与铁道工程]