期刊文献+

地铁深基坑开挖对下部既有公路隧道的影响分析 被引量:22

Analysis of Influence of Deep Foundation Pit Excavation on Existing Highway Tunnel
下载PDF
导出
摘要 以昆明地铁3号线西山公园站深基坑工程骑跨既有公路隧道为工程背景,利用Midas-GTS建立二维数值模拟深基坑全过程,研究基坑开挖对下方既有隧道的变形影响规律。分析坑内加固和基坑时空效应施工措施对控制隧道上抬变形的影响,结合现场实际监测数据和有限元分析表明:(1)基坑开挖对下部岩体具有显著的垂直方向卸荷作用,其受力状态和形状的改变程度受限于上部土体性质、土体开挖量、开挖方式及隧道围岩性质;(2)坑内加固后可明显降低隧道衬砌的隆起变形,降幅约为18%;(3)实际监测数据略小于计算结果,但变形趋势二者较为吻合。 Based on the deep foundation pit of Xishan Park Station of Kunming Metro Line 3,Midas-GTS is used to conduct two dimensional numerical simulation of deep foundation pit and study the effect of deformation of foundation pit excavation on the existing tunnel below. This paper analyzes the influence of the construction measures of pit reinforcement and the space time effect of foundation pit on the deformation of the tunnel in the light of the actual monitoring data and finite element analysis. The results show that:(1) pit excavation has significant unloading effect on the lower part of the vertical rock mass,the stress condition and shape change degree are limited by the upper soil properties,soil excavation quantity,excavation pattern and tunnel surrounding rock properties;(2) the reinforcement of the tunnel can obviously reduce the uplift deformation of the tunnel lining by about 18%;(3) the actual monitoring data are slightly less than the calculation results, but the deformation tendencies of the two are fundamentally identical.
作者 孟小伟 MENG Xiao-wei(Kunming Survey,Design and Research Institute Co., Ltd. of CREEC,Kunming 650200, Chin)
出处 《铁道标准设计》 北大核心 2018年第4期136-140,共5页 Railway Standard Design
关键词 地铁车站 深基坑 公路隧道 数值模拟 坑内加固 Metro station Deep foundation pit Highway tunnel Numerical simulation Pit reinforcement
  • 相关文献

参考文献15

二级参考文献83

共引文献663

同被引文献200

引证文献22

二级引证文献154

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部