Consolidation around a point heat source

Booker, J. R.; Savvidou, C.

doi:10.1002/nag.1610090206

Cited by 200 publications

(83 citation statements)

References 3 publications

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“…Thermohydro-mechanical effects have also been of interest to many geoenvironmental processes including the geologic disposal of heat-emitting nuclear waste, frictional heating of faults (Lachenburch, 1980;Rice, 2006), geothermal energy extraction (Dickson and Fanelli, 1995), and ground freezing resulting from buried chilled-gas pipelines (Selvadurai et al, 1999a, b). Solutions to pure fluid flow in heterogeneous formations and coupled thermo-poroelastic problems for fluidsaturated geological materials have been obtained by several researchers (Booker and Savvidou, 1985;McTigue, 1986;Nguyen, 1995, 1997;Nguyen and Selvadurai, 1995;Selvadurai, 1996;Khalili and Selvadurai, 2003;Selvadurai and Selvadurai, 2010;Suvorov, 2012, 2014). Recent mathematical and computational studies of THM behaviour of fluid-saturated media with both elastic and elasto-plastic skeletal behaviour are given by Suvorov (2012, 2014) and experimental manifestations of the thermo-poroelastic Mandel-Cryer effect are also given by Najari and .…”

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confidence: 99%

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

2015

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Abstract. The paper examines the coupled thermo-hydromechanical (THM) processes that develop in a fractured rock region within a fluid-saturated rock mass due to loads imposed by an advancing glacier. This scenario needs to be examined in order to assess the suitability of potential sites for the location of deep geologic repositories for the storage of high-level nuclear waste. The THM processes are examined using a computational multiphysics approach that takes into account thermo-poroelasticity of the intact geological formation and the presence of a system of sessile but hydraulically interacting fractures (fracture zones). The modelling considers coupled thermo-hydro-mechanical effects in both the intact rock and the fracture zones due to contact normal stresses and fluid pressure at the base of the advancing glacier. Computational modelling provides an assessment of the role of fractures in modifying the pore pressure generation within the entire rock mass.

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confidence: 99%

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

2015

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“…The CAS, CNSC and BGR/UFZ teams compared their numerical results with analytical solutions proposed by Booker and Savvidou (1985) for a point heat source in an infinite isotropic porous medium (Wang et al 2016). Analytical solutions for transversely isotropic media (such as could be assumed for Opalinus Clay) do not presently exist.…”

Section: Verification With Analytical Solutionsmentioning

confidence: 99%

Modelling the Mont Terri HE-D experiment for the Thermal–Hydraulic–Mechanical response of a bedded argillaceous formation to heating

et al. 2017

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Coupled thermal-hydrological-mechanical (THM) processes in the near field of deep geological repositories can influence several safety features of the engineered and geological barriers. Among those features are: the possibility of damage in the host rock, the time for re-saturation of the bentonite, and the perturbations in the hydraulic regime in both the rock and engineered seals. Within the international cooperative code-validation project DECOVALEX-2015, eight research teams developed models to simulate an in situ heater experiment, called HE-D, in Opalinus Clay at the Mont Terri Underground Research Laboratory in Switzerland. The models were developed from the theory of poroelasticity in order to simulate the coupled THM processes that prevailed during the experiment and thereby to characterize the in situ THM properties of Opalinus Clay. The modelling results for the evolution of temperature, pore water pressure, and deformation at different points are consistent among the research teams and compare favourably with the experimental data in terms of trends and absolute values. The models were able to reproduce the main physical processes of the experiment. In particular, most teams simulated temperature and thermally induced pore water pressure well, including spatial variations caused by inherent anisotropy due to bedding.

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“…Coupled THM formulations for saturated porous media have been proposed by several authors (e.g. Booker & Savvidou, 1985;Katsube, 1988;Kurashige, 1989;Wang & Papamichos, 1999;Kanj & Abousleiman, 2005). They are usually applied to the derivation of analytical solutions and to the solution of simplified problems.…”

Section: Theoretical Formulation Coupled Phenomena and Thm Formulationmentioning

confidence: 99%

In situ behaviour of a stiff layered clay subject to thermal loading: observations and interpretation

et al. 2007

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The paper presents an interpretation of an in situ heating test carried out on Opalinus clay in the Mont Terri underground laboratory. Opalinus clay is a stiff, strongly bedded, Mesozoic clay of marine origin. When subjected to thermal loading, saturated stiff clays exhibit a strong pore pressure response that significantly affects the hydraulic and mechanical behaviour of the material. The observations gathered in the in situ test have provided an opportunity to examine the integrated thermo-hydromechanical (THM) response of this sedimentary clay. Coupled THM numerical analyses have been carried out to provide a structured framework for interpretation, and to enhance understanding of THM clay behaviour. Numerical analyses have been based on a coupled theoretical formulation that incorporates a constitutive law especially developed for this type of material. The law includes degradation of bonding by damage. By performing three-dimensional computations, it has been possible to incorporate anisotropy of material parameters and of in situ stresses. The 3D simulation has proved able to furnish a satisfactory representation of the development of the in situ test and of the main observed patterns of behaviour. A sensitivity analysis has also been carried out to examine the potential effect of various key or uncertain parameters. The critical examination of test observations and the results of the numerical analyses have allowed the classification, by differing degrees of significance, of the various coupled phenomena present in the problem.

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Consolidation around a point heat source

Cited by 200 publications

References 3 publications

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

Thermo-hydro-mechanical processes in fractured rock formations during a glacial advance

Modelling the Mont Terri HE-D experiment for the Thermal–Hydraulic–Mechanical response of a bedded argillaceous formation to heating

In situ behaviour of a stiff layered clay subject to thermal loading: observations and interpretation

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