摘要
为了探明基坑开挖对临近地铁车站出入口结构变形影响,基于有限元分析方法,依托实际工程,建立了基坑及相邻车站出入口结构的三维整体数值模型,分析了基坑开挖施工中临近车站出入口结构的位移变化规律并对其安全性进行了评价。结果表明:随着开挖深度的不断加深,车站出入口结构的水平位移除在施加支撑结构时有突变减小外,整体在不断增大,且结构顶部靠近基坑侧位移增加显著;结构竖向位移在开挖初期均有向下增加的趋势,但随着开挖深度的增加,结构远离基坑侧参考点位移有先上升又下降的趋势,而结构顶部靠近基坑侧位移持续向下增加;最后,结合计算结果对地铁车站出入口结构安全性做出评价及分析。
In order to find out the influence of foundation pit excavation on the deformation of the entrance and exit structure of the adjacent subway station,based on the finite element analysis method and the actual project,this paper establishes a three-dimensional overall numerical model of the entrance and exit structure of the foundation pit and the adjacent station,analyzes the displacement change rule of the entrance and exit structure of the adjacent train station during the excavation of the foundation pit,and evaluates its safety.The results show that:with the deepening of the excavation depth,the horizontal displacement of the structure at the entrance and exit of the station increases as a whole except for the sudden decrease when the supporting structure is applied,and the displacement near the top of the structure to the foundation pit increases significantly,the vertical displacement of the structure increases downward at the beginning of the excavation,but with the increase of the excavation depth,the displacement away from the reference point of the foundation pit side of the structure first increases.At last,combined with the calculation results,the safety of the subway station entrance and exit structure is evaluated and analyzed.
作者
张鹏
Zhang Peng(Henan Construction Foundation Engineering Co.,Ltd.,Zhengzhou 450000,China)
出处
《山西建筑》
2020年第20期98-99,116,共3页
Shanxi Architecture
关键词
基坑开挖
三维有限元
出入口结构
变形
foundation pit excavation
three-dimensional finite element
entrance and exit structure
deformation
作者简介
张鹏(1986-),男,工程师。
