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Reliability of CPT Ic as an index for mechanical behaviour classification of soils / C. S. Ku in Géotechnique, Vol. 60 N° 11 (Novembre 2010) 

Public ISBD [article]  in Géotechnique > Vol. 60 N° 11 (Novembre 2010) . - pp. 861–875 Titre : Reliability of CPT Ic as an index for mechanical behaviour classification of soils Type de document : texte imprimé Auteurs : C. S. Ku, Auteur ; C. H. Juang, Auteur ; C. Y. Ou, Auteur Année de publication : 2011 Article en page(s) : pp. 861–875 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Soil  classification  Liquefaction  Case  history  Statistical  analysis  In  situ  testing Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents results of an analysis of a set of high-quality, side-by-side piezocone penetration test (CPTu) and standard penetration test (SPT) data for examining mechanical behaviour-based classification of soils. The results show that the soil behaviour type index (I c), either defined by Jefferies and Been (denoted herein as I c,BJ) or by Robertson and Wride (denoted herein as I c,RW), is an effective parameter for mechanical behaviour classification. Additionally, an effort is made to find the most suitable I c cut-off (or boundary) value that can delineate cohesionless (sand-like) soils from cohesive (clay-like) soils. The Robertson and Wride's formulation, I c,RW = 2·67 is found capable of delineating these two classes of soils. Similarly for the Been and Jefferies' formulation, I c,BJ = 2·58 is found to be the most suitable I c cut-off value for such classification purpose. These cut-off I c values for distinguishing sand-like soils from clay-like soils are found to be reliable in a case study of liquefaction susceptibility. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.09.p.097 [article] Reliability of CPT Ic as an index for mechanical behaviour classification of soils [texte imprimé] / C. S. Ku, Auteur ; C. H. Juang, Auteur ; C. Y. Ou, Auteur . - 2011 . - pp. 861–875. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 60 N° 11 (Novembre 2010) . - pp. 861–875 Mots-clés : Soil  classification  Liquefaction  Case  history  Statistical  analysis  In  situ  testing Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : This paper presents results of an analysis of a set of high-quality, side-by-side piezocone penetration test (CPTu) and standard penetration test (SPT) data for examining mechanical behaviour-based classification of soils. The results show that the soil behaviour type index (I c), either defined by Jefferies and Been (denoted herein as I c,BJ) or by Robertson and Wride (denoted herein as I c,RW), is an effective parameter for mechanical behaviour classification. Additionally, an effort is made to find the most suitable I c cut-off (or boundary) value that can delineate cohesionless (sand-like) soils from cohesive (clay-like) soils. The Robertson and Wride's formulation, I c,RW = 2·67 is found capable of delineating these two classes of soils. Similarly for the Been and Jefferies' formulation, I c,BJ = 2·58 is found to be the most suitable I c cut-off value for such classification purpose. These cut-off I c values for distinguishing sand-like soils from clay-like soils are found to be reliable in a case study of liquefaction susceptibility. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.09.p.097