- Title
- Undrained stability of tall tunnels
- Creator
- Wilson, D. W.; Abbo, A. J.; Sloan, S. W.
- Relation
- 14th International Conference of the International Association for Computer Methods and Recent Advances in Geomechanics. Computer Methods and Recent Advances in Geomechanics (Kyoto, Japan 22-25 September, 2014) p. 447-452
- Relation
- ARC.FL0992039 http://purl.org/au-research/grants/arc/FL0992039
- Publisher Link
- http://dx.doi.org/10.1201/b17435-75
- Publisher
- Taylor & Francis
- Resource Type
- conference paper
- Date
- 2015
- Description
- Finite element limit analysis and rigid block upper bound methods are used to investigate the undrained stability of tall rectangular and horseshoe shaped tunnels. A parametric study, that considered a range of soil properties and tunnel geometries, was performed to study the stability of tunnels which are taller than they are wide. Rigorous upper and lower solutions for the tunnel stability, which bracket the true solution, are found using Finite Element Limit Analysis. This finite element technique implements a discrete form of the bound theorems of classical plasticity by employing adaptive meshing and a bespoke conic programming scheme to solve the resulting optimisation problem. The computed bounds on stability generally bracket the true collapse load to within 2% and are presented as a series of stability charts suitable for practical use.
- Subject
- finite element limit analysis; undrained stability; tall tunnels; rigid block upper bound methods
- Identifier
- http://hdl.handle.net/1959.13/1332258
- Identifier
- uon:26822
- Identifier
- ISBN:9781138001480
- Language
- eng
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