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An unsaturated hydro-mechanical modelling of two in-situ experiments in Callovo-Oxfordian argillite
- Charlier, Robert, Collin, Frédéric, Pardoen, Benoît, Talandier, Jean, Radu, Jean-Pol, Gerard, Pierre
- Engineering geology 2013 v.165 pp. 46-63
- argillite, compressibility, engineering, models
- The unsaturated behaviour of Callovo-Oxfordian argillite is investigated through the modelling of 2 in-situ experiments. The first test studies the influence of ventilation in a gallery on the hydro-mechanical behaviour of the rock mass. The second test consists in a gas injection in the rock mass from an experimental borehole. A hydro-mechanical model is described and used in the modelling of the experiments. A review of the main hydro-mechanical parameters of argillite is presented. The numerical results highlight the need of a flow boundary condition reproducing the fluid transfers between the surroundings and the rock mass. The influence of dissolved gas on the compressibility of the liquid phase is also emphasised.