摘要
本文以天津某地下五层三线换乘超深地铁车站为背景,采用PLAXIS 3D有限元软件,模拟了超深基坑分区施工对既有一号线、五号线地铁车站的影响,并探讨了其变形发展的规律。结果表明,新建车站基坑的分区方式对基坑自身和毗邻既有地铁车站结构的变形有较大影响,在现有三仓设计方案下,基坑开挖对既有地铁车站的影响较小,基坑支护结构能有效保证自身基坑和既有地铁车站的安全。
Based on the project of a five-floor subway station in Tianjin, a hub transfer station of three lines, 3D numerical simulations are intensively analyzed with PLAXIS 3D on the influence of the existing stations of Line 1 and Line 5 during zoning excavation of super-deep station pit. The deformation behaviors are studied carefully, which shows that the zoning excavation scheme of the new station plays an important role on the deformation behavior of the pit itself and the existing stations nearby. Under the existing three zones design scheme, the foundation pit excavation has little impact on the existing subway station, and the foundation pit support structure can effectively ensure the safety of its own foundation pit as well as the existing subway stations.
作者
吴航
Wu Hang(Shanghai Urban Construction Design&Research Institute(Group)Co.,Ltd.,Shanghai)
出处
《建设科技》
2022年第6期91-93,97,共4页
Construction Science and Technology
关键词
基坑分仓
超深基坑
既有地铁车站
结构变形
zoning excavation
super deep pit
existing subway stations
deformation behaviors
