Study on the stability of large cross-river shield tunnel face with seepage

被引：2
|
作者：
Lu, Xilin [1 ,2 ]
Li, Fengdi [2 ]
机构：
[1] Chongqing Jiaotong Univ, State Key Lab Breeding Base Mt Bridge & Tunnel En, Chongqing 400074, Peoples R China
[2] Tongji Univ, Dept Geotech Engn, Shanghai 200092, Peoples R China
来源：
PROGRESS IN INDUSTRIAL AND CIVIL ENGINEERING II, PTS 1-4 | 2013年 / 405-408卷
关键词：
cross-river shield tunnel; face stability; seepage; limit support pressure;
D O I：
10.4028/www.scientific.net/AMM.405-408.1371
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
By 3D numerical analysis, the seepage force on the tunnel face was obtained and shows linearly increasing trend with the water level. By considering the average seepage force on the wedge boundary of 3D trapezoidal wedge model, the limit support pressure to keep stability of tunnel face under seepage condition was obtained. The total limit support pressure increases almost linearly with the water level. In order to consider the deformation seepage coupling effect, the 3D coupled deformation and seepage numerical analysis was further used to investigate the influence of the water level on the failure of tunnel face, the results show the failure mode changes with the increase of water level, and the limit support pressure increases nonlinearly with the water level.
引用
收藏
页码：1371 / +
页数：2
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