Abstract
The Tournemire underground laboratory is situated in a clay formation and consists of a disaffected railway tunnel and two perpendicular drifts. The paper presents modelling and 3D simulations of the hydraulic behaviour of the argillaceous formation around the works. Experimental measurements of porosity, permeability and specific storage coefficients allowed us to model the hydraulic properties of the shale. Numerical simulations are performed with the code CASTEM. Numerical results of hydraulic heads are compared to experimental measurements. Calculations show that the excavation of the tunnel and drifts has induced an hydraulic decompression of the indurated argillaceous formations. The zones of decompression are centred around the structures and extend depending on the values of hydraulic parameters such as permeability and specific storage selected in the model. Six years after the excavation of the drifts, the hydraulic steady state in the fractured zone is not yet reached.
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References
Barbreau, A.and Boisson, J.-Y.(1994)Caracte ´risation d 'une formation argileuse.Synthe`se des principaux re ´sultats obtenus a`partir du tunnel de Tournemire (1991-1993),EC Final Rep EUR 15756,Technol.Series.CEC Nuclear Science,Luxembourg.
Boisson, J.-Y., Cabrera, J.and De Windt, L.(1998)Etude des e ´coulements dans un massif argileux,laboratoire souterrain de Tournemire,Report CEA-IPSN DPRE/SERGD 98/ 06,France.
Boisson, J.-Y., Bertrand,L., Heitz, J.-F.and Moreau-Le Golvan, Y.(2001)In-situ and laboratory investigations of fluid flow through an argillaceous formation at different scales of space and time,Tournemire tunnel,Southern France,Hydrogeology Journal, 9,108-123.
Cabrera,J., Volant,P., Baker C., Pettitt W.and Young, R.P.(1999)Structural and geophysical investigations of the EDZ in indurated argillaceous media:The tunnel and the galleries of the IPSN Tournemire site,France,in Proceedings of the 37th U.S.Rock Mech.Sympo.Vail/ USA/6-9 June 1999,pp.957-964.
Cabrera,J., Beaucaire,C., Bruno,G., De Windt, L., Genty,A., Ramambasoa,N., Rejeb,A., Savoye, S.and Volant,P.(2001)Projet Tournemire.Synthe`se des programmes de recherche (1995-1999),Report IRSN/DPRE/SERGD 01/19,France.
Carslaw, H.S.and Jaeger, J.C.(1959)Conduction of heat in solids,Clarendon Press, Oxford.
C.E.A.,CASTEM 2000 User 's Manual,english Version,C.E.A.
Chavent, G.and Roberts, J.-E.(1991)A unified physical presentation of mixed, mixed-hybrid finite elements and standard finite difference approximations for the determination of velocities in water flow problems,Adv.Water Resources, 14 (6), 329-348.
Cosenza, Ph., Ghoreychi,M., de Marsily, G., Vasseur, G.and Violette,S.(2002)An integrated approach to predict properties of argillaceous rocks,in Poromechanics II,In:J.-L. Auriault et al.(eds.),Proceedings of the second Biot conference on poromechanics, A.A. Balkema Publishers, Grenoble,157-163.
Dabbene,F.(1998)Mixed-hybrid nite elements for transport of pollutants by under round water,In:Proceedings of the 10th Int.Conf.on Finite Elements in Fluids, U.S.A.,pp.456-461.
Hsieh, P.A., Tracy, J.V., Neuzil, C.E.and Silliman, S.E.(1981)A transient laboratory method for determining the hydraulic properties if 'tight 'rocks-I:Theory,Int.J.Rock Mech. Min.Sci.and Geomech.Abstr.,18, 245-252.
de Marsily, G.(1986)Quantitative Hydrogeology, Academic Press Inc. (London).
Lalieux,P., Thury, M. and Horsman,S.(1996)Radioactive waste disposal in argillaceous media,OCDE/NEA Newsletter, 34.
Neuzil, C.E., Cooley,C., Silliman, S.E., Bredehoeft, J.D.and Hsieh, P.A.(1981)A transient laboratory method for determinining the hydraulic properties if 'tight 'rocks-II: Application,Int.J.Rock Mech.Min.Sci.and Geomech.Abstr.18, 253-258.
Neuzil, C.E.(1994)How permeable are clays and shales?Water Resources Research, 30 (2), 145-150.
Niandou,H., Shao, J.-F., Henry, J.-P.and Fourmaintraux,D.(1997)Laboratory investiga-tion of the mechanical behaviour of Tournemire shale,Int.J.Rock Mech.Min.Sci., 34 (1),3-16.
Rejeb, A.(1999)Mechanical characterization of the argillaceous Tournemire site (France),In: Proceedings de ROCKSITE-99, Bangalore (India),pp.45-50.
Thouvenin,G.(1999)Mode ´lisations couple ´es thermohydrome´caniques en milieux poreux partiellement sature ´s:solutions line ´aires et non line ´aires,Ph.D.thesis, Institut Polytechnique de Lorraine,France.
Thury, M.and Bossart, P.(1999)The Mont Terri rock laboratory,a new international research project in a Mesozoic shale formation,in Switzerland,Engineering Geology, 52, 347-359.
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Mügler, C., Genty, A. & Cabrera, J. Numerical modelling of hydraulic decompression due to the excavation of tunnel and drifts at the Tournemire underground laboratory. Geotechnical and Geological Engineering 22, 525–543 (2004). https://doi.org/10.1023/B:GEGE.0000047044.11492.e2
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DOI: https://doi.org/10.1023/B:GEGE.0000047044.11492.e2