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Article dans une revue

Changes in permeability of sand during triaxial loading: effect of fine particles production

Sadok Feia 1, * Jean Sulem 1 Jean Canou 1 Siavash Ghabezloo 1 X. Clain 1
* Auteur correspondant
1 cermes - Géotechnique
navier umr 8205 - Laboratoire Navier
Abstract : Various mechanisms can affect the permeability of dense unconsolidated sands: Volumetric dilation can lead to permeability increase, whereas strain localization in shear bands may increase or decrease the permeability depending on the state of compaction and on the level of grains breakage inside the band. To investigate these various mechanisms, an experimental study has been performed to explore the effect of different factors such as grain size and grain shape, confining pressure, level of shear, stress path, and formation of one or several shear bands on the permeability of dense sands under triaxial loading. The experimental results show a reduction of permeability during the consolidation phase and during the volumetric contraction phase of shear loading, which can be related to the decrease of porosity. The experimental results also show that, depending on the confining pressure, the permeability remains stable or decreases during the volumetric dilation phase despite the increase of total porosity. This permeability reduction is attributed to the presence of fine particles, which result from grains attrition during pre-localization and grains breakage inside the shear band during the post-localization phase.
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https://hal-enpc.archives-ouvertes.fr/hal-01070484
Contributeur : Siavash Ghabezloo <>
Soumis le : mercredi 1 octobre 2014 - 14:46:18
Dernière modification le : vendredi 17 juillet 2020 - 17:09:08

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Sadok Feia, Jean Sulem, Jean Canou, Siavash Ghabezloo, X. Clain. Changes in permeability of sand during triaxial loading: effect of fine particles production. Acta Geotechnica, Springer Verlag, 2014, sous presse. ⟨10.1007/s11440-014-0351-y⟩. ⟨hal-01070484⟩

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