Three-dimensional stability analysis of active and passive trapdoors

Shiau, Jim ORCID: and Lee, Ji-Sung and Al-Asadi, Fadhil (2021) Three-dimensional stability analysis of active and passive trapdoors. Tunnelling and Underground Space Technology, 107:103635. pp. 1-10. ISSN 0886-7798


There has been an increasing interest in the study of sinkhole occurrences due to frequent underground activities. Most of the research direction are related to the detection of the underground cavity using geophysics techniques. Very little is done in the area of soil stability. This paper investigates the three-dimensional stability of circular and square trapdoors. The combined effect of surcharge pressure, soil weight and supporting pressure is considered in Broms and Bennermarks’ original stability number for a cohesive soil. The study uses the finite element limit analysis to compute upper bound and lower bound minimum supporting pressures for both collapse and blowout scenarios. The obtained critical stability numbers and factor of safety are compared with other published results in both two- and three- dimensions. Design charts, tables and equations are presented to cover a wide range of design parameters and a practical example is introduced to illustrate how to use the them.

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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: 05 Jan 2021 04:34
Last Modified: 22 Jun 2021 09:05
Uncontrolled Keywords: Stability number; Trapdoor; Three-dimensional analysis; Finite element limit analysis; Circular trapdoor
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
12 Built Environment and Design > 1204 Engineering Design > 120403 Engineering Design Methods
01 Mathematical Sciences > 0103 Numerical and Computational Mathematics > 010301 Numerical Analysis
Fields of Research (2020): 49 MATHEMATICAL SCIENCES > 4903 Numerical and computational mathematics > 490302 Numerical analysis
40 ENGINEERING > 4005 Civil engineering > 400502 Civil geotechnical engineering
33 BUILT ENVIRONMENT AND DESIGN > 3303 Design > 330311 Models and simulations of design
Socio-Economic Objectives (2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
D Environment > 96 Environment > 9614 Soils > 961499 Soils not elsewhere classified
D Environment > 96 Environment > 9610 Natural Hazards > 961099 Natural Hazards not elsewhere classified
Socio-Economic Objectives (2020): 28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280110 Expanding knowledge in engineering
27 TRANSPORT > 2703 Ground transport > 270311 Road safety
12 CONSTRUCTION > 1202 Construction design > 120201 Civil construction design
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