Stability design charts for unsupported wide rectangular tunnels

Shiau, Jim and Sams, Mathew and Chen, Jing (2016) Stability design charts for unsupported wide rectangular tunnels. International Journal of GEOMATE, 21 (01). pp. 139-150. ISSN 1089-3032

Abstract

This paper investigates the stability of a plane strain wide rectangular tunnel in cohesive soils. A strength reduction technique and the finite difference program FLAC are used to determine the factor of safety for unsupported wide rectangular tunnels. Results from the finite difference approach are compared with published rigorous upper and lower bound analysis. The comparison between these two methods finds very good agreement. Stability design charts for wide rectangular tunnels are presented for a wide range of practical scenarios using dimensionless ratios. The potential usefulness of this approach is demonstrated using a number of examples. This is considered a simpler way of analysing the stability of an unsupported tunnel.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Files associated with this item cannot be displayed due to copyright restrictions.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 30 Oct 2017 05:47
Last Modified: 08 Feb 2018 05:13
Uncontrolled Keywords: wide rectangular tunnel; stability; undrained clay; factor of safety; FLAC; shear strength method; design chart
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
URI: http://eprints.usq.edu.au/id/eprint/33236

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