Physical modelling and PIV analyses of an underground tunnel heading
Paper
Paper/Presentation Title | Physical modelling and PIV analyses of an underground tunnel heading |
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Presentation Type | Paper |
Authors | Shiau, J. S. (Author), Sams, M. S. (Author) and Kemp, R. J. (Author) |
Editors | Yoo, Chungsik, Park, Seong-Wan, Kim, Bumjoo and Ban, Hoki |
Journal or Proceedings Title | Geotechnical Aspects of Underground Construction in Soft Ground |
Number of Pages | 5 |
Year | 2014 |
Place of Publication | Netherlands |
ISBN | 9781138027008 |
9781315738956 | |
Digital Object Identifier (DOI) | https://doi.org/10.1201/b17240-12 |
Conference/Event | 8th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground (TC204 ISSMGE IS-SEOUL 2014) |
Event Details | 8th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground (TC204 ISSMGE IS-SEOUL 2014) Event Date 25 to end of 27 Aug 2014 Event Location Seoul, Korea |
Abstract | Predicting surface and sub-surface movement upon tunnel heading failure is essential for safety and contingency planning. This paper presents the results of a 2D physical modelling experiment of tunnel heading failure in cohesionless soil. By modelling six overburden to diameter ratios, the research seeks to investigate the behaviour, magnitude and failure mechanism of a tunnel heading. The physical model uses displacement control to simulate tunnel heading movement. The use of transparent faced modelling containers allows video capture of the soil movement as the tunnel heading is displaced. From the captured video, Particle Image Velocimetry (PIV) was then utilised to analyse soil movement. PIV examines and monitors groups of pixels based on colour variability, thus small amounts of coloured sand were added to ensure accurate tracking. This then allowed close monitoring of the soil movement, which allows verification of settlement results and examination of failure behaviour. It is concluded that the current experimental procedures produce qualitative results that can be used to compare with results obtained from numerical experiments. FLAC modelling with FISH programing is recommended for this purpose in the future. |
Keywords | PIV; sand; stability; underground tunnels; structural geology; numerical experiments |
ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
410605. Soil physics | |
401706. Numerical modelling and mechanical characterisation | |
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/q2xqv/physical-modelling-and-piv-analyses-of-an-underground-tunnel-heading
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