半逆筑法施工超大地铁深基坑工程设计方法  

Design of a Semi-reversed Construction Method for a Super-large Subway Deep Foundation Pit

作　　者：孙立柱[1] 陈鹤[1] 刘寒迁[2] 曾妮[3] 薛茹镜[1] 邢旺[1] 

机构地区：[1]北京市市政工程设计研究总院,北京100082 [2]北京城市铁路股份有限公司,北京100088 [3]北京城建设计研究总院有限责任公司,北京100037

出　　处：《都市快轨交通》2011年第4期99-101,111,共4页Urban Rapid Rail Transit

摘　　要：针对某超大地铁深基坑工程,提出一种适合大型地铁基坑工程的新型支撑体系———"半逆作"环板形支撑体系的设计理念。以增量法对基坑施工进行全过程模拟,讨论支撑刚度对基坑水平变形及围护结构内力的影响,并对差异沉降引起结构的附加应力进行分析,为工程顺利施工提供了理论依据。A new support system called ＇semi-reverse＇ annular plate system has been put forward which is suitable for a super-large subway deep foundation pit project.By using an incremental method,the paper simulated the whole process of foundation pit construction and discussed the effects of brace stiffness on foundation pit＇s horizontal deformations and internal forces in enclosure structure.Additional stresses in a structure caused by differential settlements were also analyzed,which provides a theoretical basis for successful construction of the project.

关 键 词：城市轨道交通 超深大基坑 半逆作 增量法 差异沉降 

分 类 号：U231.3[交通运输工程—道路与铁道工程]