摘要
以深圳地铁5号线前海湾站软土深基坑工程为背景,采用修正剑桥模型模拟软土,考虑流固耦合作用,为研究了软土深基坑与邻近地铁车站的相互变形影响。结果表明:既有地铁车站的存在会使基坑两侧桩体位移呈现非对称变形,同时导致基坑地表在车站区域内发生隆起;新建基坑开挖会引起既有地铁车站产生水平方向的刚性移动以及竖直方向的高低抬动,同时增大车站主体结构的拉应力;当新建基坑与既有地铁车站间隔距离达到20 m以上时,新建基坑与既有地铁车站的相互变形影响可以忽略不计。
Taking the soft soil foundation at Qianhaiwan Station on Shenzhen metro Line 5 as the background,and considering the fluid-solid coupling,the modified Cambridge Model is used to simulate soft soil for the study of the mutual deformation influence between the deep soft soil foundation and the existing metro station.The result shows that the existing metro station will cause asymmetrically deformation of the pile displacement on both sides of the foundation,and the foundation pit surface will rise in the station area;while the new foundation excavation will cause rigid movement of the existing metro station in horizontal direction,also the high and low lift in vertical direction,which inevitably increase the tensile stress of station main structure.When the distance between the new foundation pit and the existing metro station is more than 20 m,the mutual deformation influence of new foundation pit and existing metro station can be neglected.
作者
程玉兰
王毅红
CHENG Yulan;WANG Yihong(Xinjiang Construction Vocational and Technical College,830026,Urumqi,China)
出处
《城市轨道交通研究》
北大核心
2019年第9期14-20,共7页
Urban Mass Transit
基金
国家自然科学基金项目(51478043)
关键词
软土深基坑
既有车站
桩体位移
地表沉降
结构位移
仿真分析
soft soil foundation pit
existing station
pile displacement
surface settlement
structural displacement
simulation analysis
