摘要
地铁隧道附近基坑的开挖对地铁的运行有较大影响,其影响是当前研究的热点。基于某地铁隧道附近采用全回转咬合桩(硬咬合)灌注桩+一道钢筋混凝土支撑的基坑支护工程,采用Plaxis岩土有限元软件对实际施工工况进行模拟,动态地分析了基坑开挖工程对地铁隧道变形的影响,并与地铁隧道的变形监测结果进行了对比。结果表明,基坑开挖对邻近地铁隧道变形产生一定影响,但影响可控,采用合理的基坑支护形式可达到变形要求。
Excavation of foundation pit near metro tunnel has great influence on the operation of metro.Its influence is a hotspot in the current study.Based on a foundation pit supporting project near a metro tunnel which uses the full circle swinging secant pile wall(hard holding-on)cast-in-place pile+a reinforced concrete support,the Plaxis geotechnical finite element software is used to simulate the practical engineering construction,dynamically to analyze the influence of foundation pit excavation on the deformation of metro tunnel,and to compare the deformation monitoring results of metro tunnel.The results show that the excavation of foundation pit has certain influence on the deformation of the adjacent metro tunnel,but the influence can he controlled.The reasonable supporting form of foundation pit can meet the requirements of deformation.
作者
郑志均
郑江敏
Zheng Zhijun;Zheng Jiangmin
出处
《城市道桥与防洪》
2019年第11期185-188,m0019,共5页
Urban Roads Bridges & Flood Control
关键词
基坑开挖
地铁隧道
隧道变形
数值模拟
excavation of foundation pit
metro tunnel
tunnel deformation
numerical simulation