Effect of saturation degree on the behaviour of clear sand in very dense state

Khai Hoan TRAN; Saber Imanzadeh; Said Taibi; Hanène Souli; Jean-Marie Fleureau; Mahdia Hattab

doi:10.26168/ajce.40.1.18

Khai Hoan TRAN Normandie Université, UNIHAVRE, Laboratoire Ondes et Milieux Complexes, CNRS UMR 6294, Le Havre, France; Thai Nguyen University of Technology, Thai Nguyen, Vietnam
Saber Imanzadeh INSA Rouen Normandie; Laboratoire Ondes et Milieux Complexes
Said Taibi Normandie Université, UNIHAVRE, Laboratoire Ondes et Milieux Complexes, CNRS UMR 6294, Le Havre, France
Hanène Souli Ecole Nationale Supérieure de Saint Etienne, Laboratoire de Tribologie et and Dynamique des Systèmes, CNRS UMR 5513, 42023 Saint Etienne, France
Jean-Marie Fleureau Université Paris-Saclay, CentraleSupélec, CNRS UMR 8579, Laboratoire de Mécanique des Sols, Structures et Matériaux, 91190, Gif-sur-Yvette, France
Mahdia Hattab Université de Lorraine, Laboratoire d'Etude des Microstructures et de Mécanique des Ma-tériaux, CNRS UMR 7239, Arts et Métiers ParisTech, F-57000 Metz, France.

DOI: https://doi.org/10.26168/ajce.40.1.18

Keywords: Liquefaction, unsaturation, Skempton's coefficient B, dense, Hostun sand

Abstract

In this paper, a series of tests were carried out to investigate the effect of saturation degree on the liquefaction behaviour of Hostun sand in a very dense state. All the samples were reconstituted by the wet tamping method at a high relative density of 83%. After sample wetting and sample consolidation, the samples having different saturation degrees have been subjected to cyclic loading to study the liquefaction behaviour. The Cyclic Stress Ratio (CSR) of the cyclic loading increased after a given number of cycles until the liquefaction of material. The results show that even though the samples were in a very dense state and not fully saturated, they were liquefied under cyclic loading with increasing CSR. The saturation degree or Skempton's coefficient B affects significantly the liquefaction potential of samples. A decrease of B value from 0.97 to 0.7 results in the increase of CSR needed to liquefy the samples from 0.25 to 0.35. However, the effect of this parameter on the friction angle seems not to be clear.