Influence des fluides sur le comportement différé de la craie

Abstract : A preliminary experimental study was performed by means of loading stages oedometric tests to highlight the role played by the fluids in the compaction of chalks. Based on a preceding research, the analysis of the North Sea oil reservoir subsidence, the oedometer adaptation to multiphase chalks (air/water or oil/water) required particular precautions. The procedure was validated successfully by the first results which highlight an effect of the fluid saturating on one-dimensional creep. The fluid according to its wettability decreases the resistance and the viscous behaviour starts earlier. Depending on the relationship between the applied stress and the pre consolidation stress, creep is more important when the sample is saturated due to the decrease of the pre consolidation stress. These aspects of the mechanical behaviour of chalks should then be taken into account in an analysis of the long-term stability of underground quarry.
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G. Priol, Vincenzo de Gennaro, Pierre Delage, Claudia Sorgi, J. Vicente, et al.. Influence des fluides sur le comportement différé de la craie. 22. Rencontres universitaires de génie civil, Jun 2004, Marne-La-Vallée, France. pp.NC. ⟨ineris-00976151⟩

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