Evaluating CPTu in sensitive Haney clay using a modified SCE-CSSM solution

Paul W. Mayne, James Greig, Shehab Agaiby

In the proceedings of: GeoEdmonton 2018: 71st Canadian Geotechnical Conference; 13th joint with IAH-CNC

Session: In-Situ Testing

ABSTRACT: Results from piezocone tests in sensitive clay from Haney BC are interpreted using a modified analytical model based on spherical cavity expansion theory and critical state soil mechanics. The solution allows the evaluation of the undrained rigidity index which in turn provides the profiles of undrained shear strength and yield stress. The yield stress ratio is expressed in three separate formulations using net cone resistance, excess porewater pressure, and effective cone resistance. When compared together, this trio is useful in the identification of sensitive clays from insensitive clays.

RÉSUMÉ: Les résultats des tests de piézocône dans l'argile sensible de Haney BC sont interprétés en utilisant un modèle analytique légèrement modifié basé sur la théorie de l'expansion de la cavité sphérique et la mécanique des sols à l'état critique. La solution permet l'évaluation de l'indice de rigidité non drainé qui à son tour fournit les profils de la résistance au cisaillement non drainé et de la limite d'élasticité. Le rapport de contrainte d'écoulement est exprimé dans trois formulations distinctes en utilisant la résistance de cône net, la pression de l'eau interstitielle en excès et la résistance au cône efficace. Comparé entre eux, ce trio est utile pour identifier les argiles sensibles des argiles insensibles.

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Cite this article:
Paul W. Mayne; James Greig; Shehab Agaiby (2018) Evaluating CPTu in sensitive Haney clay using a modified SCE-CSSM solution in GEO2018. Ottawa, Ontario: Canadian Geotechnical Society.

@article{geo2018Paper279,author = Paul W. Mayne; James Greig; Shehab Agaiby,title = Evaluating CPTu in sensitive Haney clay using a modified SCE-CSSM solution,year = 2018}