Physical modelling and PIV analyses of an underground tunnel heading

Shiau, J. S. and Sams, M. S. and Kemp, R. J. (2014) Physical modelling and PIV analyses of an underground tunnel heading. In: 8th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground (TC204 ISSMGE IS-SEOUL 2014) , 25-27 Aug 2014, Seoul, Korea.

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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.


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Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
Refereed: Yes
Item Status: Live Archive
Additional Information: © 2014 Korean Geotechnical Society. Permanent restricted access to published version due to publisher copyright policy. Paper presented at: 8th International Symposium on Geotechnical Aspects of Underground Construction in Soft Ground (TC204 ISSMGE IS-SEOUL 2014), Seoul, 25-27 Aug 2014.
Faculty / Department / School: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying
Date Deposited: 10 May 2015 22:54
Last Modified: 01 Aug 2017 23:50
Uncontrolled Keywords: PIV; sand; stability; underground tunnels; structural geology; numerical experiments
Fields of Research : 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
05 Environmental Sciences > 0503 Soil Sciences > 050305 Soil Physics
09 Engineering > 0913 Mechanical Engineering > 091307 Numerical Modelling and Mechanical Characterisation
Socio-Economic Objective: B Economic Development > 87 Construction > 8704 Construction Processes > 870403 Industrial Construction Processes
Identification Number or DOI: 10.1201/b17240-12
URI: http://eprints.usq.edu.au/id/eprint/26821

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