防灾减灾工程学报2017，Vol.37Issue(6)：910-915,6.DOI:10.13409/j.cnki.jdpme.2017.06.008
上软下硬地层双线地铁隧道下穿既有城市道路地层变形规律研究
Research on Deformation Law of Different Layers during Metro Tunnel Construction Undercrossing the Existing Urban Road in Upper-soft and Lower-hard Ground
胡德华 1段景川1
作者信息
- 1. 中电建南方建设投资有限公司,广东深圳518000
- 折叠
摘要
Abstract
Large surface settlement is often caused when there are tunnels constructing in the upper-soft lower-hard ground.Taking the antuo-mountain entrance/exit lines of Shenzhen subway line 7,which pass under the North ring Road,as an example,the essay combines numerical simulation with field monitoring to make researches.Based on the utilization of monitoring measurement,the essay analyses the surrounding rock and s stratum deformation law during the tunnel pass under the existed road.The result shows:The loading on road surface has significant impact on settlement of tunnel surrounding rocks.When the distance between twin tunnels is relatively small,the full-section grouting method obviously influenced the deformation of shallow strata a bove the grouting interval,and so is the deeper part near the tunnel.Full-section grouting method has positive effect on surface settlement controlling,while it is important to concern the upheaval.In this project,the full-section grouting method impact harder on the parts which is 8 meters beyond the reinforcing ring.And the full-section grouting method impact weaker on the parts which is 8-13 meters beyond the reinforcing ring.The comprehensive application of various monitoring methods ensures the construction safety.关键词
上软下硬地层/地层沉降/双线隧道施工/监控量测Key words
upper-soft lower-hard ground/monitoring measurement/stratum settlement/twin-track tunnel分类
交通工程引用本文复制引用
胡德华,段景川..上软下硬地层双线地铁隧道下穿既有城市道路地层变形规律研究[J].防灾减灾工程学报,2017,37(6):910-915,6.
