Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/7022
Title: Modified Kastner formula for cylindrical cavity contraction in Mohr-Coulomb medium for circular tunnel in isotropic medium
Authors: Cheng, YM 
Keywords: Cavity contraction
Cavity expansion
Kastner formula
Issue Date: Mar-2012
Publisher: Cambridge University Press
Source: Journal of mechanics, Mar. 2012, v. 28, no. 1, p. 163-169 How to cite?
Journal: Journal of mechanics 
Abstract: The Kastner formula for cavity contraction is one of the commonly used formulae for the cavity contraction problem in tunnel excavation, and it is based on the assumption of small displacement around the cavity with no volume change in the plastic zone. In this paper, the errors arising from these assumptions are discussed, and the volume change of the plastic zone is considered. It can be seen that this assumption is reasonable for normal situations, but for rock with weak shear strength, the Kastner formula should be used with care, especially in situations where there will be relatively large volume changes in the plastic zone.
URI: http://hdl.handle.net/10397/7022
ISSN: 1727-7191(print)
1811-8216 (EISSN)
DOI: 10.1017/jmech.2012.17
Rights: Copyright © 2012 The Society of Theoretical and Applied Mechanics, R.O.C.
The following article "Y. M. Cheng (2012). Modified Kastner Formula for Cylindrical Cavity Contraction in Mohr-Coulomb Medium for Circular Tunnel in Isotropic Medium. Journal of Mechanics, v.28, no. 1, pp 163-169. doi:10.1017/jmech.2012.17." is available at http://journals.cambridge.org/action/displayAbstract?fromPage=online&aid=8518643
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