摘要
以兰州地铁1号线某车站基坑为背景,对该基坑开挖过程中地下管道的位移进行全面分析.采用排桩加内撑支护结构对基坑进行支护,并考虑地下管道、周围土体、围护结构的相互作用,借助有限元软件ADINA建立地铁车站基坑三维有限元分析模型.通过有限元法分析,表明施工开挖步骤、管道埋深离基坑的距离对地下管道位移有显著影响,进而总结竖向位移下管道的变形规律,为深基坑设计和施工提供重要的依据.
Taking the foundation pit of a subway station on line 1#in Lanzhou downtown as background,a comprehensive analysis of the displacement of the underground pipelines during pit excavation is conducted.A structure of pile-array with internal support is used to retain the foundation pit and by taking account of the interaction of the underground pipes,surrounding soil,and retaining structure with each other,a three-dimensional finite element analysis model is built up by using software ADINA.It is shown by finite element analysis that the pit excavation procedure,pipeline buried depth,and its distance from the excavation pit will have a significant effect on the underground pipelines displacement.The deformation pattern of the pipeline in the case of its vertical displacement is summed up further,which will provide an important basis for deep foundation pit design and construction.
出处
《兰州理工大学学报》
CAS
北大核心
2015年第6期120-125,共6页
Journal of Lanzhou University of Technology
基金
国家自然科学基金资助(项目批准号:51568042)
甘肃省自然科学基金(1208RJZA158)
甘肃省高等学校基本科研业务费资助项目
关键词
兰州地区
地铁车站
有限元法
深基坑
位移
Lanzhou area
subway station
finite element method
deep foundation pit
displacement
