Design Equations for Predicting Stability of Unlined Horseshoe Tunnels in Rock Masses
Article
Article Title | Design Equations for Predicting Stability of Unlined Horseshoe Tunnels in Rock Masses |
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ERA Journal ID | 210216 |
Article Category | Article |
Authors | Lawongkerd, Jintara, Shiau Jim, Keawsawasvong, Suraparb, Seehavong, Sorawit and Jamsawang, Pitthaya |
Journal Title | Buildings |
Journal Citation | 12 (11), pp. 1-25 |
Article Number | 1800 |
Number of Pages | 25 |
Year | 2022 |
Publisher | MDPI AG |
Place of Publication | Switzerland |
ISSN | 2075-5309 |
Digital Object Identifier (DOI) | https://doi.org/10.3390/buildings12111800 |
Web Address (URL) | https://www.mdpi.com/2075-5309/12/11/1800 |
Abstract | This paper aims to propose new stability equations for the design of shallow, unlined horseshoe tunnels in rock masses. The computational framework of the upper- and lower-bound finite-element limit analysis is used to numerically derive the stability solutions of this problems using the Hoek–Brown failure criterion. Five dimensionless parameters including the width ratio and the cover-depth ratio of the tunnels, as well as the normalized uniaxial compressive strength, the geological strength index, and the yield parameters of the Hoek–Brown rock masses, are considered in the study. Selected failure mechanisms of the horseshoe tunnels in rock masses are presented to portray the effect of all dimensionless parameters. New design equations for stability analyses of horseshoe tunnels are developed using the technique of nonlinear regression analysis and the average bound solutions. The proposed stability equations are highly accurate and can be used with great confidence by practitioners. |
Keywords | design equation; finite-element-limit analysis; Hoek–Brown; horseshoe tunnels; rock mass |
ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
Funder | King Mongkut's University of Technology North Bangkok |
Byline Affiliations | Thammasat University, Thailand |
School of Engineering | |
King Mongkut’s University of Technology Thonburi (KMUTT), Thailand |
https://research.usq.edu.au/item/wzx7y/design-equations-for-predicting-stability-of-unlined-horseshoe-tunnels-in-rock-masses
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