Letteratura scientifica selezionata sul tema "Thermo-hydromécanique"
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Articoli di riviste sul tema "Thermo-hydromécanique":
Devillers, P., C. Saix e M. S. El Youssoufi. "Loi de comportement thermo-hydromécanique pour les sols non saturés : identification in situ des indices de compression thermique". Canadian Geotechnical Journal 33, n. 2 (8 maggio 1996): 250–59. http://dx.doi.org/10.1139/t96-004.
Fauchille, Anne-Laure, Bram van den Eijnden, Kevin Taylor e Peter David Lee. "Détermination de la taille et du nombre d’échantillons devant être analysés en laboratoire pour la caractérisation statistique de la microstructure d’une roche argileuse". Revue Française de Géotechnique, n. 165 (2020): 1. http://dx.doi.org/10.1051/geotech/2020024.
Tesi sul tema "Thermo-hydromécanique":
Eslami, Hossein. "Comportement thermo-hydromécanique des sols au voisinage des géo-structures énergétiques". Thesis, Université de Lorraine, 2014. http://www.theses.fr/2014LORR0263/document.
Energy geostructures involve providing a direct heat exchange with the ground through integrated systems in the foundations or geotechnical structures. The incorporation of heat exchangers in geostructures produces a cyclic variation of the temperature in the adjacent soil. Therefore, there are important scientific questions about the effect of temperature variations on hydro-mechanical soil parameters in general, and particularly for sensitive clay soils. The main objective of this thesis is to improve the understanding and the quantification of the impact of temperature variation on the bearing capacity of geothermal piles. Currently, the design of the bearing capacity of deep foundations is based on the results of in situ penetrometer and pressuremeter tests. Herein, experimental methods are developed to carry out these tests in laboratory conditions. Mini-penetrometer tests were carried out on samples compacted at different initial states and subjected to temperature variations ranging from 1 to 70 °C. The results showed a significant change in the studied parameters: the cone resistance (qc) and the friction sleeve resistance (fs) for an illitic material compacted on the dry side of the compaction curve. Mini-pressuremeter tests performed on the same illitic compacted soil in a thermo-regulated metric scale container, showed a decrease in creep pressure (pf) and limit pressure (pl) with increasing temperature, while the variation of pressuremeter modulus (EM) is less pronounced. The results showed a quasi-reversibility of the effect of a heating cycle through the temperature range tested, while the effect of a cooling cycle was only partially reversible. In the case of several thermal cycles, the first cycle induced more important parameter variations than the subsequent cycles, and at the end of the experimentation. Further analysis of the evolution of the thermal properties (thermal conductivity (λ), heat capacity (Cv) and thermal diffusivity (D)) within heating and cooling process as a function of soil water content and dry density showed an increase of these parameters with the increase of initial values of w and ρd, and an increase of λ in the dry side of the compaction curve with increasing temperature from 1 to 70 °C. In summary, for the energy piles driven in the clay soils, some modifications in the bearing capacity have to be taken into account due to the variation of the hydro-mechanical parameters of the soil induced by thermal cycles
Masri, Moustafa. "Étude expérimentale et modélisation numérique du comportement thermomécanique à haute température de l’argilite de Tournemire". Thesis, Lille 1, 2010. http://www.theses.fr/2010LIL10079/document.
We proposed, in this work, an experimental and numerical study of mechanical behavior of shale rocks subjected to mechanical and thermal loads.In the petroleum industry, during the production of heavy oil with the technique of steam water injection at high temperature, the cap rocks are subjected to coupled thermal and hydro-mechanical solicitations. The challenge is to study the hydro-mechanical behavior of these materials subject to large variations in temperature in order to assess the mechanical stability of the reservoir. The experimental study includes the modifications in a triaxial cell in ordre to support a high temperature (250° C). These modifications are very important for hydrostatic, uniaxial and triaxial tests, all these tests are used to obtain an experimental data base characterizing the thermal effect on the mechanical behavior of shale rocks.The modeling framework is proposed at first to describe the mechanical behavior of shale rock in isotropic case. After a detailed analysis of experimental data obtained in the experimental section, a specific coupled elastoplastic-damage model has been developed to describe the mechanical behavior of these shale materials. The effect of temperature is taken into account and a comparison between numerical simulations and experimental data have shown the ability of the proposed model for the description of thermo mechanical coupling. To describe the behavior of anisotropic rocks, we have proposed an extension of the fabric tensor model to present the initial anisotropy of shale rock. This formulation is expressed in terms of invariant stress tensor coupled with loading orientation. Laboratory tests under different stress paths were modeled, the proposed model seems able to describe correctly the main mechanical responses of shale materials
Coarita, Tintaya Ever-Dennys. "Modélisation du comportement élastoplastique anisotrope et endommageable des argilites : application au stockage des déchets radioactifs". Electronic Thesis or Diss., Université de Lorraine, 2020. http://www.theses.fr/2020LORR0245.
Deep clay formations such as Callovo-Oxfordian (COx) are one of the options currently being considered for the storage of radioactive waste disposal in France by the National Radioactive Waste Management Agency. Observations (deformation, pore pressure, ...) carried out on the scale of in situ structures at the Meuse/Haute-Marne underground research laboratory have, however, revealed complex hydromechanical behaviour with highly anisotropic induced fracturing that is difficult to capture and to reproduce using classical constitutive models. The work of this thesis focused on the formation of the connected fractured zone and discrete fractured zone induced by excavation and their consequences on transport properties. Based on experimental results and the recently developed rheological models of this rock, a macroscopic anisotropic, elastoplastic and damage constitutive model was proposed that describes the key mechanisms of the short-term (pre- and post-peak) behaviour of COx claystone. This model was implemented in Comsol Multiphysics®. The application of the proposed model was carried out on the GCS gallery of the LS M/HM by hydromechanical simulations under saturated conditions. The numerical results were successfully compared with in situ observations and measurements in terms of, in particular, pore pressure distribution, ZFC/ZFD extension (approached by the plastic zones in post-peak and pre-peak, respectively) and horizontal and vertical convergences. Finally, the operational character of the model for thermo-hydro-mechanical modelling applications of HA cells (Cigéo project) was investigated on a geometry reduced to a micro-tunnel of cells
Giraud, Albert. "Couplages thermo-hydro-mécaniques dans les milieux poreux peu perméables : application aux argiles profondes". Marne-la-vallée, ENPC, 1993. http://www.theses.fr/1993ENPC9310.