Tunnel face stability in cohesion-frictional soils considering the soil arching effect by improved failure models

被引：150
|
作者：
Zou, Jinfeng [1 ]
Chen, Guanghui [1 ]
Qian, Zehang [1 ]
机构：
[1] Cent South Univ, Sch Civil Engn, 22 Shaoshan South Rd,Railway Campus, Changsha 410075, Hunan, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2019年 / 106卷
基金：
国家重点研发计划;
关键词：
Tunnel face stability; Soil arching effect; Limit analysis; Limit equilibrium; Improved lateral stress ratio; CIRCULAR TUNNELS; SHALLOW TUNNELS; SHIELD TUNNEL; STRESSES; STRENGTH; DRIVEN;
D O I：
10.1016/j.compgeo.2018.10.014
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
To better assess the stability of tunnel faces in cohesion-frictional soils, tunnel face stability was investigated considering the soil arching effect in this study. An improved 3D rotational failure model based on the limit analysis method and an improved wedge-prism model based on the limit equilibrium method were proposed. Simultaneously, the lateral stress ratio K-s was improved to reflect the soil arching effect. The support pressures obtained by the two proposed models were validated by the numerical results and existing works. Finally, the effects of the geometrical and geotechnical parameters and loading conditions on the tunnel face stability were assessed.
引用
收藏
页码：1 / 17
页数：17
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