Face stability analysis of a shallow square tunnel in non-homogeneous soils

被引：27
|
作者：
Guang-hui, Chen [1 ]
Jin-feng, Zou [1 ,2 ]
Qi, Min [3 ]
Wu-jun, Guo [4 ]
Tai-zhong, Zhang [5 ]
机构：
[1] Cent South Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China
[2] Cent South Univ, Key Lab Heavy Haul Railway Engn Struct, Minist Educ, Changsha 410075, Hunan, Peoples R China
[3] Cent South Univ, Sch Math & Stat, Changsha 410075, Hunan, Peoples R China
[4] Guizhou Zhongjiao Tonghuai Expressway Co Ltd, Tongren 554300, Guizhou, Peoples R China
[5] CCCC Second Highway Engn Co Ltd, Xian 710000, Shanxi, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2019年 / 114卷
关键词：
Discrete technique; Face stability of square tunnels; Soil arching effect; Limit analysis theory; Non-homogeneous frictional angle phi; SHEAR-STRENGTH; SHIELD TUNNEL; CIRCULAR TUNNELS; EARTH-PRESSURE; COLLAPSE; SLOPE; MODEL;
D O I：
10.1016/j.compgeo.2019.103112
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
An improved approach for the face stability analysis of shallow square tunnels in non-homogeneous soils is investigated in this study. Based on the discrete technique, an improved 3D failure mechanism is proposed to investigate the face stability of square tunnels by incorporating the soil arching effect in the framework of the limit analysis theory. To better assess the stability issue, the non-homogeneous frictional angle phi is also considered when calculating the critical support pressures. The results obtained from this study are validated by those from the 3D finite element limit analysis and an advanced wedge-prism model based on an existing research on the limit equilibrium method.
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收藏
页数：13
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