Caractérisation et prédiction du comportement hydromécanique des milieux rocheux fracturés

Abstract : During the last three decades, considerable efforts have been devoted to investigate and to characterize the hydromechanical behaviour of fractures. INERIS has participated to this research in collaboration with the Sols, Solides, Structures laboratory (L3S) from Institut National Polytechnique of Grenoble, the Environnement, Géomécanique & Ouvrages laboratory (LAEGO) from Institut National Polytechnique of Lorraine and Géoscience-Azur laboratory from Nice university. The main contributions concern the determination of relations between joint hydraulic opening and joint mechanical closure ; the improvment of a experimental device, préviously used to characterize individual fractures at the laboratory scale, in order to also measure the flow through porous rock mass sample in addition to fracture flows ; the development of a removable device allowing the in situ fracture monitoring through the realization of simultaneous pressure and mechanical displacement measurements. Three-dimensional numerical approach was also developed to simulate at big scale the hydromechanical behavior of a fractured rockmass using explicit representation for the main fractures and up-scaling for the others. Thus, this work made it possible to progress in the theoretical and practical comprehension of the laws governing the coupling between the mechanical deformations and the fl ows within the fractured rock mass. From now, it is possible to consider the application of these results to various problems relating to the field of INERIS expertise as rock slope stability or underground cavern design.
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Alain Thoraval. Caractérisation et prédiction du comportement hydromécanique des milieux rocheux fracturés. Rapport Scientifique INERIS, 2009, 2008-2009, pp.90-91. ⟨ineris-01869255⟩

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