Numerical Investigation of Undrained Trapdoors in Three Dimensions

Shiau, Jim ORCID: https://orcid.org/0000-0002-9220-3184 and Hassan, Mohammad Mirza (2021) Numerical Investigation of Undrained Trapdoors in Three Dimensions. International Journal of Geosynthetics and Ground Engineering:30. pp. 1-12. ISSN 2199-9260


Abstract

The stability of soil overlying the cavity is often a concern when it comes to the risk of sinkhole occurrences. Current sinkhole studies have been centred on the use of geophysical techniques to detect underground cavity sizes and associated depths. With the measured information, it is possible to theoretically predict the extent of a ground surface collapse. This paper studies the stability of trapdoors and the associated extent of ground surface failure. The shear strength reduction method is used to obtain factors of safety for various scenarios associated with the collapse of a three-dimensional trapdoor underlying undrained clay. Numerical solutions are verified by using the finite element limit analysis technique with upper and lower bound theorems and other published results. A number of practical examples are provided to demonstrate the use of design charts and tables, which can be used together with the application of geophysical tools to predict sinkhole occurrences.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Faculty/School / Institute/Centre: Current - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 -)
Date Deposited: 13 May 2021 03:26
Last Modified: 12 Oct 2021 03:57
Uncontrolled Keywords: Sinkhole, FLAC3D, Strength reduction method, Surface failure extent
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
Identification Number or DOI: https://doi.org/10.1007/s40891-021-00283-w
URI: http://eprints.usq.edu.au/id/eprint/41966

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