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In situ measurement of nonlinear shear modulus of silty soil / A. Kurtulus in Journal of geotechnical and geoenvironmental engineering, Vol. 134 N°10 (Octobre 2008) 

Public ISBD [article]  in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N°10 (Octobre 2008) . - pp. 1531–1540 Titre : In situ measurement of nonlinear shear modulus of silty soil Type de document : texte imprimé Auteurs : A. Kurtulus, Auteur ; K. H. Stokoe II, Auteur Année de publication : 2008 Article en page(s) : pp. 1531–1540 Note générale : Geotechnical and geoenvironmental engineering Langues : Anglais (eng) Mots-clés : Shear  modulus  Measurement  Laboratory  tests  Silts  Drilled  shafts Résumé : A new field test method to evaluate in situ nonlinear shear modulus of soils was developed. The method utilizes a drilled shaft as a cylindrical, axisymmetric source for shear loading of soil at depth. The applicability of the test method was studied by conducting small-scale, prototype experiments at a “calibration” field site in Austin, Texas. Numerous conventional in situ and laboratory measurements were performed to characterize the soil at the field site. The “small-scale” nature of the tests involved using a 381mm (15in.) diameter, 3.7m (12ft) long drilled shaft. Experimental results from this field study provided an opportunity to compare laboratory and field measurements of the G−logγ and G∕Gmax−logγ curves. This comparison was used to investigate the accuracy of common procedures relating field and laboratory modulus reduction curves. Nonlinear modulus measurements were performed at depths of 1.8to2.1m (6to7ft) in a silt (ML). The field G∕Gmax−logγ curve for this soil at low confining pressures are in general agreement with the laboratory curve from an intact specimen as well as empirical curves. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A10%281 [...] [article] In situ measurement of nonlinear shear modulus of silty soil [texte imprimé] / A. Kurtulus, Auteur ; K. H. Stokoe II, Auteur . - 2008 . - pp. 1531–1540. Geotechnical and geoenvironmental engineering Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 134 N°10 (Octobre 2008) . - pp. 1531–1540 Mots-clés : Shear  modulus  Measurement  Laboratory  tests  Silts  Drilled  shafts Résumé : A new field test method to evaluate in situ nonlinear shear modulus of soils was developed. The method utilizes a drilled shaft as a cylindrical, axisymmetric source for shear loading of soil at depth. The applicability of the test method was studied by conducting small-scale, prototype experiments at a “calibration” field site in Austin, Texas. Numerous conventional in situ and laboratory measurements were performed to characterize the soil at the field site. The “small-scale” nature of the tests involved using a 381mm (15in.) diameter, 3.7m (12ft) long drilled shaft. Experimental results from this field study provided an opportunity to compare laboratory and field measurements of the G−logγ and G∕Gmax−logγ curves. This comparison was used to investigate the accuracy of common procedures relating field and laboratory modulus reduction curves. Nonlinear modulus measurements were performed at depths of 1.8to2.1m (6to7ft) in a silt (ML). The field G∕Gmax−logγ curve for this soil at low confining pressures are in general agreement with the laboratory curve from an intact specimen as well as empirical curves. En ligne : http://ascelibrary.org/doi/abs/10.1061/%28ASCE%291090-0241%282008%29134%3A10%281 [...]