摘要
地铁上方土体大面积开挖时,因为卸荷作用,土体会发生隆起,同时土体下方的隧道也会伴随出现变形,变形过大将会影响列车的安全运行。如何控制开挖土体引起的隧道竖向变形是一个非常重要的问题。以杭州某河道开挖工程为研究对象,运用ABAQUS有限元软件进行数值模拟,建立三维模型,分析隧道上方土体开挖顺序对隧道的竖向变形影响。分析结果表明:隧道群上方土体开挖应优先开挖埋深较浅隧道上方的土体,同时尽可能保证开挖区域的对称性,以减小隧道不均匀变形。本文的研究结果可为今后的类似工程提供借鉴。
Due to large-scale unloading,excavation above the tunnels may cause soil resilience and the deformation to the metro tunnels,which threaten the operation greatly.How to reduce the influence of excavation,and decrease the vertical deformation of tunnels is very important.In this study,a 3-D model for channel excavation was established in ABAQUS.The influence of the excavation sequence on the vertical deformation of tunnels was analyzed in details.The results show that it is a reasonable excavation sequence to excavate the soils above shallow tunnels and the tunnels with little spacing first.The symmetry of excavation area should be paid attention to.Moreover,the excavation sequence is given as references for similar projects.
作者
熊伟
陈江
陈昌平
徐长节
Xiong Wei;Chen Jiang;Chen Changping;Xu Changjie(Jiangxi Key Laboratory of Infrastructure Safety Control in Geotechnical Engineering,Nanchang 330013,China;Zhejiang Communications Investment Group Co.,Ltd.,Hangzhou 310000,China;Hangzhou New East City Construction & InvestmentLimited Company,Hangzhou 310000,China;Research Center of Coastal and Urban Geotechnical Engineering,ZhejiangUniversity,Hangzhou 310000,China)
出处
《华东交通大学学报》
2019年第4期113-118,共6页
Journal of East China Jiaotong University
基金
国家重点基础研究发展计划(973计划)项目(2015CB057801)
国家杰出青年科学基金项目(51725802)
关键词
铁路隧道
开挖顺序
数值计算
河道开挖
隧道群
三维模型
railway tunnel
excavation sequence
numerical calculation
riverway-digging
tunnel group
three-dimensional model
