期刊信息
主管单位:教育部
主办单位:重庆大学
主  编:刘汉龙
地  址:重庆市沙坪坝区沙正街174号 重庆大学期刊社 《土木与环境工程学报》编辑部
邮政编码:400044
电  话:023-65111322;023-65111863
电子邮件:xuebao@cqu.edu.cn
国际标准刊号:ISSN 2096-6717
国内统一刊号:CN 50-1218/TU
邮发代号:78-48
每期定价:¥20
全年定价:¥120
访问统计
  • 您是本站第3424930位读者
  • 今日访问822
引用本文:
【打印本页】   【HTML】   【下载PDF全文】   查看/发表评论  下载PDF阅读器  关闭
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 155次   下载 51 本文二维码信息
码上扫一扫!
分享到: 微信 更多
基坑开挖对临近基坑地铁高架结构变形的影响
梅祯, 肖军华, 王炳龙
同济大学 道路与交通工程教育部重点实验室, 上海 201804
摘要:
以苏南地区临近城市轨道交通结构的基坑工程为例,通过三维有限元模拟施工过程,反演适宜模拟该基坑施工过程的计算参数,并在此基础上研究不同开挖距离、基坑规模、开挖深度、基坑数量和施工工序的基坑施工对临近地铁高架结构的影响。结果表明:基坑与结构水平间距小于2HH为基坑深度)时,结构横向变形发展大于竖向,水平间距为1H时,桥墩水平位移和沉降达到最大;地铁高架桥桥墩附加变形伴随着基坑宽度的增大而迅速增大,当基坑宽度大于8H时,影响迅速减小;基坑开挖深度对基坑中线4H范围内的桥墩影响最大,尤其是开挖深度超过10 m后;多个基坑施工引起的结构变形表现出明显的非线性叠加效应;多基坑施工工序对结构总变形略有影响。
关键词:  地铁  高架结构  基坑开挖  有限元  反分析
DOI:10.11835/j.issn.2096-6717.2019.071
分类号:U447
基金项目:国家自然科学基金(51678447)
Influence of foundation pit excavation on the deformation of adjacent subway elevated structure
Mei Zhen, Xiao Junhua, Wang Binglong
Key Laboratory of Road and Traffic Engineering of the Ministry of Education, Tongji University, Shanghai 201804, P. R. China
Abstract:
Taking a foundation pit near the urban rail transit structure in southern Jiangsu as an example, the soil parameters were obtained by inverse analysis and three-dimensional finite element method simulations. On this basis, the influence of different excavation distances, excavation qeometries, number of foundation pits and construction procedure on the deformation of adjacent subway elevated structure is studied. The results show that, when the horizontal distance between foundation pit and structure is less than 2H (H represents the depth of the foundation pit), the lateral deformation of the structure is larger than that of vertical. The horizontal displacement and settlement of elevated bridge pier reach the maximum when horizontal distance is 1H. Besides, the additional deformation of subway viaduct piers increases rapidly with width of foundation pit. It decreases significantly when the width of foundation pit is larger than 8H. The depth of excavation of the foundation pit has the greatest influence on viaduct pier within 4H range of the central line of the foundation pit, especially when the excavation depth is more than 10 m. It is found that the structural deformation caused by multiple foundation pit construction shows obvious nonlinear superposition effect, while the construction procedure of multiple foundation pit has a slight influence on the total deformation of the structure.
Key words:  metro  elevated structure  foundation excavation  finite element analysis  back analysis
Copyright@ 2008 All Rights Reserved.
关注微信二维码