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Failure and Dilatancy Properties of Sand at Relatively Low Stresses

type de publication      article dans une revue internationale avec comité de lecture
date de publication 2006
auteur(s) Lancelot Laurent; Shahrour Isam; Al Mahmoud Marwan
journal (abréviation) Journal of Engineering Mechanics (J Eng Mech)
volume (numéro) 132 (12)
pages 1396 – 1399
résumé Analysis of geotechnical problems concerned by low confinement such as design of shallow foundations and analysis of slope stability and soil liquefaction requires modeling of the soil behavior at low stresses. This note includes a laboratory study of the behavior of Hostun RF sand at low cell pressure (20–50 kPa). Isotropic and triaxial compression drained tests were performed. Drained tests show that both failure and dilatancy angles at low stresses are stress dependent. The contractive/dilative phase transition is observed for loose sand, which may result from the overconsolidated nature of this sand for low values of cell pressure.
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