Two-dimensional tunnel heading stability factors Fc, Fs and Fγ
Article
Article Title | Two-dimensional tunnel heading stability factors Fc, Fs and Fγ |
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ERA Journal ID | 4304 |
Article Category | Article |
Authors | Shiau, Jim (Author) and Al-Asadi, Fadhil (Author) |
Journal Title | Tunnelling and Underground Space Technology |
Journal Citation | 97 |
Article Number | 103293 |
Number of Pages | 10 |
Year | 2020 |
Publisher | Elsevier |
Place of Publication | United kingdom |
ISSN | 0886-7798 |
Digital Object Identifier (DOI) | https://doi.org/10.1016/j.tust.2020.103293 |
Abstract | This paper investigates the use of stability factors to estimate tunnel heading pressures. The primary method adopted is a conventional equation based on the soil property and stability factors, analogous to the bearing capacity factors (Nc, Ns and Nγ) of strip footings. The finite element limit analysis (FELA) is employed to determine rigorous upper bound (UB) and lower bound (LB) solutions of stability factors (Fc, Fs and Fγ), which are functions of the depth ratio (C/D) and soil internal friction angle (Ø). The obtained results are compared and validated by using the finite difference analysis as well as other available published results in the literature. A number of examples are illustrated on how to use the factors to estimate tunnel heading pressures. |
Keywords | upper bound, lower bound, finite element limit analysis, tunnel stability factors |
ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
400504. Construction engineering | |
Public Notes | Files associated with this item cannot be displayed due to copyright restrictions. |
Byline Affiliations | School of Civil Engineering and Surveying |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q589x/two-dimensional-tunnel-heading-stability-factors-fc-fs-and-f
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