Stability of two circular tunnels at different depths in cohesive-frictional soils subjected to surcharge loading

被引：26
|
作者：
Xiao, Yao [1 ]
Zhao, Minghua [1 ]
Zhang, Rui [2 ]
Zhao, Heng [1 ]
Peng, Wenzhe [1 ]
机构：
[1] Hunan Univ, Inst Geotech Engn, Changsha 410082, Hunan, Peoples R China
[2] Cent S Univ, Civil Engn Coll, Changsha 410075, Hunan, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2019年 / 112卷
基金：
中国国家自然科学基金; 中国博士后科学基金;
关键词：
Tunnels; Stability; Finite element; Limit analysis; LOWER-BOUND SOLUTIONS; UNDRAINED STABILITY;
D O I：
10.1016/j.compgeo.2019.04.006
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
Adaptive finite element limit analysis (AFELA) is employed to investigate the stability of two circular tunnels at different depths in cohesive-frictional soils subjected to surcharge loading. The upper and lower bounds of the tunnel stability numbers are obtained, with the relative errors being found within +/- 5%. Five parametric studies are conducted to evaluate the effects of the horizontal and vertical spacing ratio, overburden stress factor, cover depth ratio and soil internal friction angle on the tunnel stability numbers. Design tables and charts are provided to facilitate engineers' use. In addition, typical failure mechanisms are discussed and examined.
引用
收藏
页码：23 / 34
页数：12
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