Equivalent Mohr-Coulomb and generalized Hoek-Brown strength parameters for supported axisymmetric tunnels in plastic or brittle rock

Sofianos, AI; Nomikos, PP

dc.contributor.author	Sofianos, AI	en
dc.contributor.author	Nomikos, PP	en
dc.date.accessioned	2014-03-01T01:24:19Z
dc.date.available	2014-03-01T01:24:19Z
dc.date.issued	2006	en
dc.identifier.issn	1365-1609	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/17217
dc.subject	Axisymmetry	en
dc.subject	Brittle	en
dc.subject	Equivalent strength parameters	en
dc.subject	Plastic	en
dc.subject	Supported rock mass	en
dc.subject	Tunnel	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Mining & Mineral Processing	en
dc.subject.other	Brittleness	en
dc.subject.other	Elastoplasticity	en
dc.subject.other	Mathematical models	en
dc.subject.other	Rock mechanics	en
dc.subject.other	Strength of materials	en
dc.subject.other	Equivalent strength parameters	en
dc.subject.other	Hoek-Brown (H-B) criterion	en
dc.subject.other	Mohr-Coulomb (M-C) strength parameters	en
dc.subject.other	Rock masses	en
dc.subject.other	Supported axisymmetric tunnels	en
dc.subject.other	Supported rock mass	en
dc.subject.other	Tunnels	en
dc.subject.other	brittle deformation	en
dc.subject.other	Coulomb criterion	en
dc.subject.other	elastoplasticity	en
dc.subject.other	Hoek-Brown criterion	en
dc.subject.other	plastic deformation	en
dc.subject.other	rock mechanics	en
dc.subject.other	tunnel	en
dc.title	Equivalent Mohr-Coulomb and generalized Hoek-Brown strength parameters for supported axisymmetric tunnels in plastic or brittle rock	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/j.ijrmms.2005.11.006	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.ijrmms.2005.11.006	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	The evaluation of equivalent Mohr-Coulomb (M-C) strength parameters to the prototype Hoek-Brown (H-B) ones for tunnels has been tackled in different ways for many years. The extension of the H-B criterion to the generalized one has made the challenge even greater. Most of the latest methods did not account for the effect of the support pressure and none gave formulae for equivalent parameters of supported or brittle rock. Here, an almost exact explicit solution for the evaluation of the critical pressure, of a tunnel in a rock mass satisfying the generalized H-B criterion, is initially investigated. Then, formulae are derived for the evaluation of equivalent parameters, of either elastoplastic or elastic-brittle plastic rock. They are based either on a best fitting procedure of the two envelopes or on the equation of selected responses of the models. Supported tunnels in equivalent M-C rock masses are then validated against those excavated in the prototype H-B rock masses. (c) 2005 Elsevier Ltd. All rights reserved.	en
heal.publisher	PERGAMON-ELSEVIER SCIENCE LTD	en
heal.journalName	International Journal of Rock Mechanics and Mining Sciences	en
dc.identifier.doi	10.1016/j.ijrmms.2005.11.006	en
dc.identifier.isi	ISI:000237897800002	en
dc.identifier.volume	43	en
dc.identifier.issue	5	en
dc.identifier.spage	683	en
dc.identifier.epage	704	en