An in situ thermo–hydraulic experiment in a saturated granite II: analysis and parameter estimation

20 years of excavation response studies at AECL's Underground Research Laboratory

“…The fundamental theory of thermoporoelasticity is not new, but its application to repository analyses was an important advancement of technology brought about through the TMSS. In particular, the laboratory and in situ characterization of thermoporoelastic parameters was an important contribution to coupled T-H-M analysis of rock [30][31]35]. Thermally induced propagation of fractures was examined using fundamental fracture mechanics theories providing another tool for assessing the stability of existing fractures and faults under combined thermal and hydraulic loads [40].…”

Innovative laboratory testing

“…Detournay et al [26] combined constitutive equations with balanced laws (momentum, mass and energy) and conduction laws (Darcy and Fourier) to yield field equations for the displacement and changes in pore pressure and temperature with time. The various material constants (thermoporoelastic parameters), which appear in those field equations, can be organized into five groups of material properties:…”

“…Detournay and Berchenko [26] showed that only nine independent parameters are required to characterize the thermoporoelastic response of an isotropic rock.…”

Model of nonlinear coupled thermo-hydro-elastodynamics response for a saturated poroelastic medium

“…were analyzed by Bai and Zhao [3] . Detournay et al [4] designed the thermo-hydraulic experiment to determine the thermoporoelastic parameters that control the magnitude of the pore pressure induced by thermal loading. Based on the analysis of information, material components and structural characters of the common expansive soil and the red clayed soil in Guangxi, some thermodynamics tests were done on the red clayed soil and the expansive soil under normal temperature (−4℃-60℃) to find their thermodynamics characters and their relations between shear strength index and temperature, furthermore, an undisturbed soil and remolded soil, after soaked in the different solution, were experimented to study their mechanical effect under different temperature environment [5,6] .…”