Journal
INTERNATIONAL JOURNAL OF ROCK MECHANICS AND MINING SCIENCES
Volume 46, Issue 4, Pages 665-673Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijrmms.2008.09.014
Keywords
Tunnel; Collapse; Plasticity; Limit analysis; Hoek-Brown criterion
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The reliable prediction of the state of collapse in tunnels and natural cavities is still one of the most difficult tasks in rock engineering. By making reference to the Hoek-Brown failure criterion, an exact solution is presented in the realm of plasticity theory with the help of classical tools of the calculus of variations. The resulting formulae are extremely simple and can be very useful to make comparisons with empirical methods and numerical analyses. Examples by means of some widely used software packages are also provided and discussed. (C) 2008 Elsevier Ltd. All rights reserved.
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