Upper and lower bounds for three-dimensional undrained stability of shallow tunnels

被引：11
作者：
Antao, A. N. [1 ]
da Silva, M. Vicente [1 ]
Monteiro, N. [1 ]
Deusdado, N. [1 ]
机构：
[1] Univ NOVA Lisboa, Dept Civil Engn, Fac Sci & Technol, UNIC, P-2829516 Monte De Caparica, Portugal
来源：
TRANSPORTATION GEOTECHNICS | 2021年 / 27卷
关键词：
Limit analysis; Alternating direction method of multipliers; Finite elements; Tunnel face undrained stability; CIRCULAR TUNNELS; FACE STABILITY; LIMIT ANALYSIS; DRIVEN; SHIELD; 2D;
D O I：
10.1016/j.trgeo.2020.100491
中图分类号：
TU [建筑科学];
学科分类号：
0813 ;
摘要：
This paper deals with the determination of upper and lower bounds for the three-dimensional undrained stability of shallow tunnels. The tunnel is circular and a distance between its face and its lining is considered. The soil shear strength is modeled using the Tresca criterion. Results of the upper and lower bounds of the stability number are presented, for several geometrical and resistance configurations and their comparison with previous results is made, showing the clear improvement obtained. Finally, equations approaching the stability number are proposed.
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页数：10
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