徐州地铁1号线临河车站基坑的变形特性研究

发布时间：2018-01-08 00:34

本文关键词：徐州地铁1号线临河车站基坑的变形特性研究　出处：《土木工程学报》2015年S2期 　论文类型：期刊论文

【摘要】：以徐州市轨道交通1号线为工程背景,针对学院东路站深基坑临河产生的偏压荷载对支护结构变形的作用,采用有限元Madis软件,对其分步开挖进行了数值模拟,侧重分析了对称荷载和偏压荷载下的基坑变形差异,并探讨了临河距离对基坑变形的影响。研究表明:临河引起的偏压荷载不仅会引起基坑最大水平位移的增加,同时存在着向临河侧整体倾覆的趋势,威胁基坑安全,但临河引起的偏压荷载效应仅在基坑开挖深度较大时方能体现。临河越近,基坑两侧水平位移差值随基坑临河距离呈指数变化关系,临河越远(1H),基坑两侧水平位移差值随基坑临河距离变化趋于平缓。
[Abstract]:Based on the engineering background of Xuzhou Rail Transit Line 1, the finite element Madis software is used to analyze the effect of the partial load on the deformation of the supporting structure caused by the deep foundation pit near the river in the east of Yueyue Road Station. Numerical simulation is carried out to analyze the difference of foundation pit deformation under symmetrical load and eccentric load. The influence of the distance on the deformation of foundation pit is discussed. The results show that the biasing load caused by the river will not only increase the maximum horizontal displacement of the foundation pit, but also have the tendency of overturning to the whole side of the riverside. It threatens the safety of foundation pit, but the biasing load effect caused by riverside can only be reflected when the excavation depth is larger. The closer the river is, the more the horizontal displacement difference between the two sides of the foundation pit changes exponentially with the distance of the foundation pit near the river. The farther the river is, the more the difference of horizontal displacement between the two sides of the foundation pit tends to flatten with the distance of the foundation pit near the river.
【作者单位】：江苏省交通规划设计院股份有限公司;中国科学院武汉岩土力学研究所;
【分类号】：TU753
【正文快照】： 近几年,城市轨道交通在我国迅速发展,城市轨道交通以其用地省、运能大成为了城市公共客运交通中起骨干作用的现代化立体交通系统,城市轨道交通已被称为“城市交通的主动脉”[1]。地铁车站建设的周边环境错综复杂且干扰因素较多,对基坑安全设计及施工提出了严峻的挑战。众所周

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