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Thoraval, A.; Gatelier, N.; You, T.
Revue française de géotechnique, 2005, 2005-00-00 113Journal Article
Cet article porte sur une analyse, par modélisation numérique, du comportement hydromécanique des ouvrages de stockage creusés en milieu fracturé. On a cherché à évaluer, à l’aide du logiciel 3DEC, les variations de pression hydraulique, de déplacement, de contrainte et de débit dans les fractures qu’intersecte une galerie circulaire au cours de son creusement. Nous avons pu montrer l’importance des effets mécaniques, puis quantifier la sensibilité des résultats à la position, à la raideur et à l’orientation des fractures. This article deals with the analysis of hydraulic behaviour of storage works excavated in fractured rock using numerical modelling. The 3D distinct element code 3DEC is used to assess the variations of water pressure, displacement, stress, flow-rate in the fractures intersected by a circular gallery. We could show the importance of the mechanical effects, and then quantify the sensitivity of the results to the localization, the stiffness and the orientation of the fractures.
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