4.7 Article

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

Journal

TRANSPORTATION GEOTECHNICS
Volume 27, Issue -, Pages -

Publisher

ELSEVIER
DOI: 10.1016/j.trgeo.2020.100491

Keywords

Limit analysis; Alternating direction method of multipliers; Finite elements; Tunnel face undrained stability

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This paper discusses the determination of upper and lower bounds for three-dimensional undrained stability of shallow tunnels, with the soil shear strength modeled using the Tresca criterion. Results show a clear improvement in stability number bounds for various geometrical and resistance configurations compared to previous findings. Proposed equations provide an approach to estimating the stability number.
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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