Symmetric wedge in the roof of a tunnel excavated in an inclined stress field

Nomikos, PP; Sofianos, AI; Tsoutrelis, CE

dc.contributor.author	Nomikos, PP	en
dc.contributor.author	Sofianos, AI	en
dc.contributor.author	Tsoutrelis, CE	en
dc.date.accessioned	2014-03-01T01:18:23Z
dc.date.available	2014-03-01T01:18:23Z
dc.date.issued	2002	en
dc.identifier.issn	1365-1609	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14971
dc.subject	Analytical Method	en
dc.subject	Stress Distribution	en
dc.subject	Stress Field	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Mining & Mineral Processing	en
dc.subject.other	Force measurement	en
dc.subject.other	Joints (structural components)	en
dc.subject.other	Strain	en
dc.subject.other	Stress concentration	en
dc.subject.other	Rock wedges	en
dc.subject.other	Rock mechanics	en
dc.subject.other	excavation	en
dc.subject.other	failure analysis	en
dc.subject.other	rock block	en
dc.subject.other	stability analysis	en
dc.subject.other	stress change	en
dc.subject.other	stress field	en
dc.subject.other	tunneling	en
dc.title	Symmetric wedge in the roof of a tunnel excavated in an inclined stress field	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S1365-1609(02)00013-8	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S1365-1609(02)00013-8	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	An analytical method is presented for the calculation of the stability of a two-dimensional symmetric rock wedge which is formed in the roof of an underground circular opening within an inclined biaxial stress field. The stability of the wedge is evaluated using a two-stage relaxation procedure. In the first stage, the forces acting on the joint faces of the wedge are calculated analytically from the elastic stress distribution around the opening. Thus, formulae are provided that calculate the horizontal and vertical force components on the wedge faces exerted by the surrounding rock mass. In the second stage, a steadily increasing pull out force is applied to the wedge which strains its joints. Failure is assumed to occur due to simultaneous yield along the face of one of the joints. The stability of the wedge, which is expressed by its pull out resistance, is calculated from limit equilibrium equations at failure. Finally, analytically calculated values of the pull out resistance of the wedge are compared with numerically obtained ones using a discrete element code. (C) 2002 Elsevier Science 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/S1365-1609(02)00013-8	en
dc.identifier.isi	ISI:000176395600004	en
dc.identifier.volume	39	en
dc.identifier.issue	1	en
dc.identifier.spage	59	en
dc.identifier.epage	67	en