武汉地铁名都车站基坑开挖监测与数值分析  

Monitoring and Numerical Analysis on the Foundation Pit Excavation for Mingdu Station of Wuhan Subway

作　　者：连宝琴[1] 胡斌[2] 王新刚[2] 刘飞[2] 余宏明[2] 

机构地区：[1]广州城建职业学院建筑工程系,广州510925 [2]中国地质大学(武汉)工程学院,武汉430074

出　　处：《长江科学院院报》2014年第5期34-38,共5页Journal of Changjiang River Scientific Research Institute

基　　金：国家自然科学基金面上项目(41172281);973计划项目(2011CB710604);中央高校摇篮人才计划(CUGL100413);中央高校特色学科团队(CUG090104)

摘　　要：运用国际岩土数值软件FLAC3D建立武汉地铁二号线名都车站基坑模型,并对比现场监测数据,研究该地铁基坑开挖引起的变形规律。结果表明:数值分析结果与现场监测成果吻合;高楼层的保利华都因其基础为桩基础,故地铁基坑开挖后沉降位移较小,其侧基坑地表沉降曲线呈"三角形";低矮楼层的西藏中学因其基础为条形浅基础,故地铁基坑开挖后沉降位移较大,其侧基坑地表沉降曲线呈"阶梯状"。对比现场监测成果与数值模拟分析结果,数值模拟可较好地分析了解基坑开挖引起的变形规律,从而为信息化施工、基坑支护方案的修正提供有效合理的依据。FLAC^3D was employed to establish the numerical model of the foundation pit of Mingdu station of Wuhan subway line 2.By comparing the numerical analysis with field monitoring data, we analyzed the regularity of deformation caused by excavation. Results show that numerical analysis is consistent with field monitoring results. High-rise building Baolihuadu in the north of the foundation pit suffers small settlement owing to its pile foundation, and the settlement curve of the side-pit＇s ground surface displays a triangle shape; while Tibetan school in the south undergoes large settlement because of its strip shallow foundation, with stepped settlement curve of the sidepit＇s ground surface. The numerical simulation analysis could well reflect the deformation regularity, and could provide effective and reasonable basis for the informatized construction and the modification of foundation pit support scheme.

关 键 词：FLAC^3D 地铁基坑 变形规律 数值模拟分析 

分 类 号：U231.3[交通运输工程—道路与铁道工程]