Exploració per autor "Vaunat, Jean"
Ara es mostren els items 43-62 de 88
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Heating pulse tests under constant volume on natural Boom clay. Experimental results and numerical simulations
Lima, Analice; Romero Morales, Enrique Edgar; Vaunat, Jean; Gens Solé, Antonio; Li, X.L. (2009)
Text en actes de congrés
Accés obertBoom clay is a potential geological host formation for High Level Nuclear Waste in Belgium. Impact of thermal loads may play an important role on this clay formation. To this aim, heating pulse tests on intact borehole ... -
Homogenización de barreras de arcilla para residuos nucleares
Gens Solé, Antonio; Barboza de Vasconcelos, Ramón; Rodríguez Romero, Carlos Eduardo; Vaunat, Jean; Villar Galicia, María Victoria (2021-07)
Article
Accés obertLas funciones de seguridad de las barreras de bentonita para residuos nucleares dependen principalmente del valor de su densidad seca (o porosidad). La evolución de esta variable durante la fase transitoria de la barrera ... -
Homogenization of unsaturated bentonite during hydration
Gens Solé, Antonio; Barboza de Vasconcelos, Ramón; Rodríguez Romero, Carlos Eduardo; Vaunat, Jean; Villar Galicia, María Victoria (EDP Sciences, 2023)
Article
Accés obertBentonite barriers are a key component in may designs of deep geological repositories for high level nuclear waste. During the hydration stage, the bentonite undergoes non-uniform changes in dry density that may persist ... -
Hydraulic response to a shaft excavation in Callovo-Oxfordian clay
Garitte, Benoit; Gens Solé, Antonio; Vaunat, Jean; Armand, Gilles (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2009)
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Accés obertThis document presents a coupled hydro-mechanical (HM) numerical analysis,using Code_Bright, simulating the excavation of the main access shaft to the underground laboratory of Bure (France) in Callovo-Oxfordian Clay. The ... -
Hydro-mechanical modelling of an unsaturated seal structure
Ruiz Restrepo, Daniel Felipe; Vaunat, Jean; Gens Solé, Antonio; Mánica Malcom, Miguel Ángel (CRC Press, 2018)
Text en actes de congrés
Accés restringit per política de l'editorialThe paper contains a coupled numerical analysis of the hydration of a potential sealing system for isolating shafts, ramps and connecting galleries in a deep geological repository for high level nuclear waste. The modelling ... -
Hydromechanical modelling of a tunnel excavated in argillaceous rock
Mánica Malcom, Miguel Ángel; Gens Solé, Antonio; Vaunat, Jean; Ruiz Restrepo, Daniel Felipe (Universität Innsbruck, 2017)
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Accés restringit per política de l'editorialThe paper presents selected results from a hydromechanical analysis of an excavation at great depth in argillaceous rock. A constitutive model specifically developed for this type of materials has been used. It incorporates ... -
Impermeable membranes for slab-track settlement mitigation
Pérez Romero, Joaquín; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Vaunat, Jean (2018-08)
Article
Accés obertA series of numerical simulations is used to explore the effect of the geometrical disposition of impermeable membranes in the overall performance of slab-track railway earthworks, with particular reference to the generation ... -
In situ behaviour of a stiff layered clay subject to thermal loading: Observations and interpretation
Gens Solé, Antonio; Vaunat, Jean; Garitte, Benoit; Wileveau, Y. (2007-03)
Article
Accés obertThe 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 ... -
In situ behaviour of opalinus clay under thermal loading
Gens Solé, Antonio; Garitte, Benoit; Vaunat, Jean (European Association of Geoscientists & Engineers (EAGE), 2012)
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In-situ monitoring of slope mass-wasting: examples from the Pyrenees
Oorthuis Gómez, Raül; Hurlimann Ziegler, Marcel; Moya Sánchez, José; Vaunat, Jean (International Centre for Numerical Methods in Engineering (CIMNE), 2017)
Text en actes de congrés
Accés obertSlope mass-wasting triggered by rainfall is a complex phenomenon and representsan important hazard in most mountainous regions. In-situ monitoring of the involved processes is difficult due to harsh environmental conditions ... -
Is the degree of saturation a good candidate for Bishop’s X parameter?
Pereira, J.M.; Coussy, Olivier; Alonso Pérez de Agreda, Eduardo; Vaunat, Jean; Olivella Pastallé, Sebastià (CRC Press, 2011)
Text en actes de congrés
Accés restringit per política de l'editorialIn unsaturated soil mechanics, the quest for an effective stress playing the same role as Terzaghi’s effective stress does for saturated soils has introduced a long standing debate, dating back to the 1960s. Several ... -
Marco teórico para la modelación numérica de arcillas blandas estructuradas
Mánica Malcom, Miguel Ánge; Ovando-Shelley, Efrain; Jaramillo, Eduardo Botero; Gens Solé, Antonio; Vaunat, Jean (Sociedad Mexicana de Ingeniería Geotécnica (SMIG), 2021)
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Accés restringit per política de l'editorialA partir de la combinación de teorías existentes, se presenta un marco teórico para la modelación numérica de arcillas blandas estructuradas. La formulación toma en cuenta, de forma natural, fenómenos dependientes del ... -
Modelling a hydration and heating column test on unsaturated bentonite using a double-porosity approach
Barboza de Vasconcelos, Ramón; Gens Solé, Antonio; Vaunat, Jean; Rodríguez Romero, Carlos Eduardo; Villar Galicia, María Victoria (EDP Sciences, 2023)
Article
Accés obertA controlled re-saturation of a heated 50 cm long column made of MX-80 bentonite pellets in the CIEMAT laboratory facilities (Madrid, Spain) has been running for 10 years (2011-2021). The experimental data on the saturation ... -
Modelling methane hydrate saturation in pores: capillary inhibition effects
de la Fuente Ruiz, Maria; Vaunat, Jean; Marín Moreno, Hector (2021-09)
Article
Accés obertExperimental and field observations evidence the effects of capillarity in narrow pores on inhibiting the thermodynamic stability of gas hydrates and controlling their saturation. Thus, precise estimates of the gas hydrate ... -
Modelling of a deep excavation in a stiff clay
Vaunat, Jean; Garitte, Benoit; Gens Solé, Antonio (2009)
Text en actes de congrés
Accés obertThis extended abstract presents an interpretation of the response of a mudstone during the excavation of a shaft at high depths (500m). Instrument layout and numerical model are described. A very good agreement is observed ... -
Modelling soil-vegetation-atmosphere in a field experiment
Badakhshan, Ehsan; Vaunat, Jean (2023)
Text en actes de congrés
Accés restringit per política de l'editorialIn this paper, a soil-atmosphere-vegetation interaction, comprised of the state of the atmosphere and its interactions with vegetation in terms of precipitation, wind, temperature, and radiation, is used based on a Finite ... -
Modelling the mechanical behaviour of Callovo-Oxfordian argillite: formulation and application
Gens Solé, Antonio; Mánica Malcom, Miguel Ángel; Vaunat, Jean; Ruiz Restrepo, Daniel Felipe (Springer, 2017)
Text en actes de congrés
Accés restringit per política de l'editorialThe paper presents a constitutive model for argillaceous rocks, developed within the framework of elastoplasticity, that includes a number of features that are relevant for a satisfactory description of their hydromechanical ... -
Modelling the mechanical behaviour of expansive clays
Alonso Pérez de Agreda, Eduardo; Vaunat, Jean; Gens Solé, Antonio (Elsevier, 1999)
Article
Accés obertA simple formalism is presented to model the behaviour of expansive clays. Two levels of structure are considered. The behaviour of the macrostructure follows the model developed for unsaturated materials by Alonso et ... -
Monitoring of a full-scale embankment experiment regarding soil–vegetation–atmosphere interactions
Oorthuis Gómez, Raül; Hurlimann Ziegler, Marcel; Fraccica, Alessandro; Lloret Morancho, Antonio; Moya Sánchez, José; Puig i Polo, Càrol; Vaunat, Jean (2018-06)
Article
Accés obertSlope mass-wasting like shallow slides are mostly triggered by climate effects, such as rainfall, and soil–vegetation–atmosphere (SVA) interactions play a key role. SVA interactions are studied by a full-scale embankment ... -
Monitoring the role of soil hydrologic conditions and rainfall for the triggering of torrential flows in the Rebaixader catchment (Central Pyrenees, Spain)
Oorthuis Gómez, Raül; Hurlimann Ziegler, Marcel; Vaunat, Jean; Moya Sánchez, José; Lloret Morancho, Antonio (2023-02)
Article
Accés obertTorrential flows (debris flows and debris floods) are mainly triggered by precipitation and soil hydrological processes. Most early warning systems in torrential catchments are rainfall-based. However, this approach can ...