Stability factors Fc, Fs, and Fγ for twin tunnels in three dimensions

Shiau, Jim ORCID: https://orcid.org/0000-0002-9220-3184 and Al-Asadi, Fadhil (2022) Stability factors Fc, Fs, and Fγ for twin tunnels in three dimensions. International Journal of Geomechanics, 22 (3):04021290. pp. 1-8. ISSN 1532-3641

[img]
Preview
Text (Accepted Version)
GMENG-6579_final file.pdf

Download (1MB) | Preview

Abstract

This paper aims to study the three-dimensional (3D) tunnel heading pressure of twin circular tunnels in a drained cohesive–frictional soil using a stability factor approach and finite-element limit analysis (FELA). The primary concept adopted will be the use of a conventional equation that is similar to the traditional bearing capacity factors (e.g., Nc, Ns, and Nγ) in Terzaghi’s bearing capacity equation. For various spacing ratios (S/D) between the tunnels, the stability of the tunnels is expressed in terms of nondimensional tunnel stability factors (e.g., Fc, Fs, and Fγ), which are functions of the depth ratio (C/D) and soil internal friction angle (ϕ). For conciseness, the results will be presented in charts and tables with the tunnel stability factors that used the rigorous FELA upper (UB) and lower bound (LB) solutions.


Statistics for USQ ePrint 46092
Statistics for this ePrint Item
Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: File reproduced in accordance with the copyright policy of the publisher/author.
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Faculty/School / Institute/Centre: Current – Faculty of Health, Engineering and Sciences - School of Engineering (1 Jan 2022 -)
Date Deposited: 22 Dec 2021 06:43
Last Modified: 20 Sep 2022 22:55
Uncontrolled Keywords: upper bound; lower bound; three-dimensional finite-element limit analysis; tunnel stability factors; spacing ratio
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
Identification Number or DOI: https://doi.org/10.1061/(ASCE)GM.1943-5622.0002264
URI: http://eprints.usq.edu.au/id/eprint/46092

Actions (login required)

View Item Archive Repository Staff Only