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periodically performed to evaluate axial transmissivity under different dilatometer pressures. It can
be assumed that pressure changes are preferably transmitted through the EDZ along the borehole.
As a consequence, the hydraulic conductivity of the EDZ can be seen as a function of
(a) (b)
Figure 3: Evolution of radial profile of pore water pressure during the decrease of the internal
pressure (a) and during the heating/cooling cycle (b). The chosen Drücker-Prager criterion in this
case is perfectly plastic.
Figure 4: Stress path at the inner radius of the hollow cylinder for different combinations of the
Drücker-Prager criterion
Figure 5: Experiment layout long-term dilatometer experiment [2]
inflation pressure of the dilatometer. The objective of this second benchmark is to model this behaviour.
A finite element model based on a hydro-mechanical approach including an evolution of
the permeability tensor is developed. The evolution of permeability is based on a cubic law. A fic-
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