A laboratory study of slip surface formation in an intact natural stiff clay

Georgiannou, VN; Burland, JB

dc.contributor.author	Georgiannou, VN	en
dc.contributor.author	Burland, JB	en
dc.date.accessioned	2014-03-01T01:23:24Z
dc.date.available	2014-03-01T01:23:24Z
dc.date.issued	2006	en
dc.identifier.issn	0016-8505	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16953
dc.subject	Clays	en
dc.subject	Laboratory equipment	en
dc.subject	Laboratory tests	en
dc.subject	Shear strength	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Pore pressure	en
dc.subject.other	Pressure effects	en
dc.subject.other	Shear strength	en
dc.subject.other	Strain gages	en
dc.subject.other	Stress analysis	en
dc.subject.other	Dilation	en
dc.subject.other	Laboratory equipment	en
dc.subject.other	Laboratory tests	en
dc.subject.other	Slip surfaces	en
dc.subject.other	Clay	en
dc.subject.other	clay	en
dc.subject.other	dilation	en
dc.subject.other	displacement	en
dc.subject.other	laboratory method	en
dc.subject.other	pore pressure	en
dc.subject.other	shear strength	en
dc.subject.other	slip	en
dc.subject.other	stiffness	en
dc.subject.other	strain	en
dc.subject.other	stress	en
dc.subject.other	Corinth [Peloponnisos]	en
dc.subject.other	Eurasia	en
dc.subject.other	Europe	en
dc.subject.other	Greece	en
dc.subject.other	Peloponnisos	en
dc.subject.other	Southern Europe	en
dc.title	A laboratory study of slip surface formation in an intact natural stiff clay	en
heal.type	journalArticle	en
heal.identifier.primary	10.1680/geot.2006.56.8.551	en
heal.identifier.secondary	http://dx.doi.org/10.1680/geot.2006.56.8.551	en
heal.language	English	en
heal.publicationDate	2006	en
heal.abstract	The paper presents the results of drained constant-p' tests on natural undisturbed specimens of Corinth Marl. The specimens were instrumented with local axial strain gauges and pore pressure probes. The relationship between deviator stress q and overall axial strain is characterised by a flat peak followed by a small reduction in strength. The specimen dilates strongly throughout this phase of the test. A steep drop in strength then occurs, resulting in the formation of a thin slip surface and the cessation of dilation. Careful analysis of the results from the local strain gauges indicates that strain localisation initiates after peak strength but before the commencement of the steep drop in q. Most of the reduction in shear strength takes place for relative displacements of less than 0-5 mm, after which stable post-rupture strength is reached. The pore pressure probes show that, during the initial stages of drained shearing, a small reduction in local pore pressure occurs in the middle of the specimen relative to the ends, which is consistent with dilation. This pore pressure difference reduces rapidly during the formation of the slip surface, reflecting the cessation of dilation of the material on either side of the slip surface.	en
heal.publisher	THOMAS TELFORD PUBLISHING	en
heal.journalName	Geotechnique	en
dc.identifier.doi	10.1680/geot.2006.56.8.551	en
dc.identifier.isi	ISI:000242027700003	en
dc.identifier.volume	56	en
dc.identifier.issue	8	en
dc.identifier.spage	551	en
dc.identifier.epage	559	en