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Transfert hydrique dans des sols argileux gonflants : influence du confinement

Abstract : Description of imbibition and swelling mechanisms in clayey soils represents an important stake in different scientific domains such as agronomy, geotechnics or petroleum industry. The aim of the present work is to show the effects of hydromechanical couplings during imbibition in a swelling clayey medium, under different confinement conditions. Our material is a bentonite-silt mixture, prepared with a known water content and compacted with a double-piston technique. This method allows us to produce uniform soil samples, in terms of humidity and bulk density. Experiments related to bottom imbibition are then carried out for three types of mechanical boundary conditions (free, oedometric, fixed volume). The non-intrusive dual-energy gamma-ray technique is used to assess the local variation of bulk density and humidity. Finally, the three imbibition kinetics are compared for each experiment in tèrms of hydraulic diffusivity, described in a Lagrangian way.
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Submitted on : Thursday, March 29, 2018 - 12:30:11 PM
Last modification on : Saturday, October 16, 2021 - 11:22:03 AM
Long-term archiving on: : Friday, September 14, 2018 - 3:03:11 PM


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  • HAL Id : tel-01749860, version 1



Sébastien Rolland. Transfert hydrique dans des sols argileux gonflants : influence du confinement. Autre. Institut National Polytechnique de Lorraine, 2002. Français. ⟨NNT : 2002INPL003N⟩. ⟨tel-01749860⟩



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