HYDRO-MECHANICAL COUPLING IN UNSATURATED COMPACTED CLAYEY SOILS : MODELLING THE WATER RETENTION BEHAVIOUR
Résumé
Some results of an experimental investigation focused on the study of hydro-mechanical coupling in unsaturated compacted soil, related to the evolution of water retention properties are briefly commented. A model for water retention domain is suggested, that succedes in tracking the evolution of the retention properties along generalised hydro-mechanical paths. A dependence of intra-aggregate pore space on water content, ruled by clay activity, is introduced. The evolution of inter-aggregate water content, following variations of void ratio, comes naturally from a suitable dependence of the analytical function chosen to describe the complete water retention domain.
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