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Evaluation of undrained shear strength using full-flow penetrometers / Jason T. de Jong in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 1 (Janvier 2011) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 14-26 Titre : Evaluation of undrained shear strength using full-flow penetrometers Type de document : texte imprimé Auteurs : Jason T. de Jong, Auteur ; Nicholas J. Yafrate, Auteur ; Don J. de Groot, Auteur Année de publication : 2011 Article en page(s) : pp. 14-26 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Full-flow  penetrometer  T-bar  Ball  CPT  In  situ  testing  Undrained  strength  Sensitivity Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Full-flow penetrometers (the T-bar and ball) are increasingly used on sites with thick deposits of soft clays, particularly prevalent offshore. Full-flow penetration tests were performed at five international well-characterized soft clay test sites to assess the use of full-flow penetrometers to estimate undrained shear strength. Field vane shear data were used as the reference undrained strength. Statistical analyses of strength factors indicates that full-flow penetrometers provide an estimate of undrained shear strength at a similar level of reliability compared to the piezocone. Relationships for estimating the strength factor and soil sensitivity using only full-flow penetrometer data obtained during initial penetration and extraction are developed. A strong dependence of the strength factor on sensitivity was identified and can be used for the estimation of undrained strength. The effectiveness and use of the developed correlations are demonstrated through their application at an additional test site. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i1/p14_s1?isAuthorized=no [article] Evaluation of undrained shear strength using full-flow penetrometers [texte imprimé] / Jason T. de Jong, Auteur ; Nicholas J. Yafrate, Auteur ; Don J. de Groot, Auteur . - 2011 . - pp. 14-26. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 1 (Janvier 2011) . - pp. 14-26 Mots-clés : Full-flow  penetrometer  T-bar  Ball  CPT  In  situ  testing  Undrained  strength  Sensitivity Index. décimale : 624.1 Infrastructures.Ouvrages en terre. Fondations. Tunnels Résumé : Full-flow penetrometers (the T-bar and ball) are increasingly used on sites with thick deposits of soft clays, particularly prevalent offshore. Full-flow penetration tests were performed at five international well-characterized soft clay test sites to assess the use of full-flow penetrometers to estimate undrained shear strength. Field vane shear data were used as the reference undrained strength. Statistical analyses of strength factors indicates that full-flow penetrometers provide an estimate of undrained shear strength at a similar level of reliability compared to the piezocone. Relationships for estimating the strength factor and soil sensitivity using only full-flow penetrometer data obtained during initial penetration and extraction are developed. A strong dependence of the strength factor on sensitivity was identified and can be used for the estimation of undrained strength. The effectiveness and use of the developed correlations are demonstrated through their application at an additional test site. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i1/p14_s1?isAuthorized=no