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Estimating hydraulic conductivity from piezocone soundings / J. C. Chai in Géotechnique, Vol. 61 N° 8 (Août 2011) 

Public ISBD [article]  in Géotechnique > Vol. 61 N° 8 (Août 2011) . - pp. 699–708 Titre : Estimating hydraulic conductivity from piezocone soundings Type de document : texte imprimé Auteurs : J. C. Chai, Auteur ; P. M. A. Agung, Auteur ; T. Hino, Auteur Année de publication : 2011 Article en page(s) : pp. 699–708 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Sands  Clays Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A method for estimating the hydraulic conductivity of soils from piezocone penetration tests is suggested in this paper. By invoking Darcy's law over the finite time required for an increment of cone penetration, it is argued that there will be some water movement through the soil around the cone, albeit very small if the soil is very fine grained. Based on this argument, and noting the comprehensive test data collected previously by Elsworth & Lee, a bi-linear relation between the dimensionless piezocone sounding metric B q Q t and the dimensionless hydraulic conductivity index K D plotted on double logarithmic scales has been proposed for soils ranging from sands to clays. It is demonstrated that these revised relationships can be used to evaluate plausible values of hydraulic conductivity from piezocone sounding records taken at two different clay soil sites in Saga and Yokohama, Japan. The major significance of this work is in extending the range of application of the method first proposed by Elsworth & Lee for sands to almost all soil types. This was possible after appropriate modification of Elsworth and Lee's original method. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.10.p.009 [article] Estimating hydraulic conductivity from piezocone soundings [texte imprimé] / J. C. Chai, Auteur ; P. M. A. Agung, Auteur ; T. Hino, Auteur . - 2011 . - pp. 699–708. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 61 N° 8 (Août 2011) . - pp. 699–708 Mots-clés : Sands  Clays Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A method for estimating the hydraulic conductivity of soils from piezocone penetration tests is suggested in this paper. By invoking Darcy's law over the finite time required for an increment of cone penetration, it is argued that there will be some water movement through the soil around the cone, albeit very small if the soil is very fine grained. Based on this argument, and noting the comprehensive test data collected previously by Elsworth & Lee, a bi-linear relation between the dimensionless piezocone sounding metric B q Q t and the dimensionless hydraulic conductivity index K D plotted on double logarithmic scales has been proposed for soils ranging from sands to clays. It is demonstrated that these revised relationships can be used to evaluate plausible values of hydraulic conductivity from piezocone sounding records taken at two different clay soil sites in Saga and Yokohama, Japan. The major significance of this work is in extending the range of application of the method first proposed by Elsworth & Lee for sands to almost all soil types. This was possible after appropriate modification of Elsworth and Lee's original method. DEWEY : 624.15 ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.10.p.009

Estimating hydraulic conductivity from piezocone soundings / J. C. Chai in Géotechnique, Vol. 62 N° 10 (Octobre 2012) 

Public ISBD [article]  in Géotechnique > Vol. 62 N° 10 (Octobre 2012) . - pp. 955 –956 Titre : Estimating hydraulic conductivity from piezocone soundings Type de document : texte imprimé Auteurs : J. C. Chai, Auteur ; P. M. A. Agung, Auteur ; T. Hino, Auteur Année de publication : 2012 Article en page(s) : pp. 955 –956 Note générale : Génie Civil Langues : Anglais (eng) Note de contenu : Discussion ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.12.D.001 [article] Estimating hydraulic conductivity from piezocone soundings [texte imprimé] / J. C. Chai, Auteur ; P. M. A. Agung, Auteur ; T. Hino, Auteur . - 2012 . - pp. 955 –956. Génie Civil Langues : Anglais (eng) in Géotechnique > Vol. 62 N° 10 (Octobre 2012) . - pp. 955 –956 Note de contenu : Discussion ISSN : 0016-8505 En ligne : http://www.icevirtuallibrary.com/content/article/10.1680/geot.12.D.001