Reference : Hydro and hydro-mechanical modelling of ventilation test in clayey rocks
Scientific congresses and symposiums : Poster
Engineering, computing & technology : Civil engineering
http://hdl.handle.net/2268/116871
Hydro and hydro-mechanical modelling of ventilation test in clayey rocks
English
Pardoen, Benoît mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Charlier, Robert mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Collin, Frédéric mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Radu, Jean-Pol mailto [Université de Liège - ULg > Département Argenco : Secteur GEO3 > Géomécanique et géologie de l'ingénieur >]
Talandier, Jean [Agence Nationale pour la Gestion des Déchets Radioactifs - ANDRA > > > >]
3-Oct-2011
No
International
22nd ALERT Workshop
03-10-2011 to 05-10-2011
Alert Geomaterials
Aussois
France
[en] Unsaturated soil ; excavation damaged zone ; numerical modelling ; radioactive waste
[en] Long-term repository of radioactive waste in deep argillaceous geological media needs a good understanding of the host formation behaviour. Considering the safety function of the formation and the need of low permeability, the behaviour of the excavation damaged zone (EDZ) is a major issue. Because drainage may modify the structure and the size of this zone, a ventilation test (SDZ) is realised by the French national radioactive waste management agency (ANDRA) in an experimental gallery of the Meuse/Haute-Marne underground research laboratory located in Callovo-Oxfordian claystone. The aim is to characterise the effect of the desaturation and possible resaturation of the damaged zone due to controlled ventilation.
Numerical modellings are performed to reproduce the ventilation test. A biphasic flow model in unsaturated soil and an elasto-plastic constitutive law are used for the host formation. A nonclassical boundary condition has been developed in order to model the exchanges between the cavity and the rock. Numerical results show that it is possible to calibrate the models to obtain a satisfactory reproduction of the in situ experimental measurements and a better understanding of the fluid transfer around the gallery during the ventilation test.
Researchers ; Professionals ; General public
http://hdl.handle.net/2268/116871

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