- Title
- Undrained stability of rectangular tunnels where shear strength increases linearly with depth
- Creator
- Wilson, Daniel W.; Abbo, Andrew J.; Sloan, Scott W.; Yamamoto, Kentaro
- Relation
- ARC.FL0992039 http://purl.org/au-research/grants/arc/FL0992039
- Relation
- Canadian Geotechnical Journal Vol. 54, Issue 4, p. 469-480
- Publisher Link
- http://dx.doi.org/10.1139/cgj-2016-0072
- Publisher
- NRC Research Press
- Resource Type
- journal article
- Date
- 2017
- Description
- This paper investigates the stability of a plane strain rectangular tunnel under undrained conditions, where the shear strength profile increases linearly with depth. The undrained stability of tunnels for a range of geometries and soil conditions is found using rigid-block upper bound methods as well as finite element limit analysis (FELA). The latter procedures employ a discrete form of the bound theorems of classical plasticity to formulate an optimization problem that is solved using a bespoke conic programming scheme. Rigorous solutions, obtained using adaptive re-meshing of the finite element mesh, generally bracket the true collapse load with upper and lower bound solutions to within 2%. Results from the parametric study are summarized in the form of stability charts.
- Subject
- tunnel stability; finite element; limit analysis; upper bound solution; rigid block
- Identifier
- http://hdl.handle.net/1959.13/1351309
- Identifier
- uon:30681
- Identifier
- ISSN:0008-3674
- Language
- eng
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