Stability charts for unsupported plane strain tunnel headings in homogeneous undrained clay
Article
Article Title | Stability charts for unsupported plane strain tunnel headings in homogeneous undrained clay |
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ERA Journal ID | 210663 |
Article Category | Article |
Authors | Shiau, Jim (Author), Sams, Mathew (Author), Al-Asadi, Fadhil (Author) and Mirza Hassan, Mohammad (Author) |
Journal Title | International Journal of GEOMATE |
Journal Citation | 14 (41), pp. 19-26 |
Number of Pages | 8 |
Year | 2018 |
Publisher | Geomate International Society |
Place of Publication | Japan |
ISSN | 2186-2982 |
2186-2990 | |
Digital Object Identifier (DOI) | https://doi.org/10.21660/2018.41.29138 |
Web Address (URL) | https://geomatejournal.com/geomate/article/view/3200 |
Abstract | ABSTRACT: This paper investigates the stability of plane strain tunnel headings in undrained soils. Using the factor of safety approach via the strength reduction technique, the idealised tunnel heading models are studied using the finite difference program FLAC. This problem is also similar to underground long wall excavations in plane strain condition. The finite difference results are presented alongside upper and lower bound limit solutions for validation. A thorough comparison between these two methods finds a very good agreement. Design charts are presented for a wide range of practical scenarios using dimensionless ratios, similar to Taylor’s design charts used for slope stability. Typical examples are presented to illustrate the usefulness for practising engineers. |
Keywords | plain strain heading, undrained clay, stability, strength reduction method, design chart |
ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
490302. Numerical analysis | |
Public Notes | Copyright © Int. J. of GEOMATE. All rights reserved, including the making of copies unless permission is obtained from the copyright proprietors. |
Byline Affiliations | School of Civil Engineering and Surveying |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q4962/stability-charts-for-unsupported-plane-strain-tunnel-headings-in-homogeneous-undrained-clay
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