期刊
COMPUTERS AND GEOTECHNICS
卷 49, 期 -, 页码 314-325出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compgeo.2012.09.005
关键词
Tunnels; Stability; Limit analysis; Finite element methods
类别
资金
- Australian Laureate Fellowship grant by the Australian Research Council [FL0992039]
This paper investigates the stability of a plane strain square tunnel in undrained clay, where the shear strength profile increases linearly with depth. The stability for a range of tunnel geometries and soil conditions are found using rigid-block upper bound methods as well as finite element limit analysis. The latter procedures employ a discrete form of the bound theorems of classical plasticity, use a bespoke conic programming scheme to solve the resulting optimisation problems, and bracket the true collapse load with upper and lower bound solutions to within 5% for all the cases considered. Results from the parametric study are summarised in the form of stability charts. An approximate closed-form expression is developed for use by practising engineers. Crown Copyright (C) 2012 Published by Elsevier Ltd. All rights reserved.
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