| Titre : | In situ measurement of nonlinear shear modulus of silty soil (2008) |
| Auteurs : | A. Kurtulus, Auteur ; K. H. Stokoe II, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of geotechnical and geoenvironmental engineering (Vol. 134 N°10, Octobre 2008) |
| Article en page(s) : | pp. 1531–1540 |
| Note générale : | Geotechnical and geoenvironmental engineering |
| Langues : | Anglais |
| Tags : | 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%281531%29 |
