Ara es mostren els items 1-20 de 49

  • 3D Interpretation of an in situ heating test in the callovo-oxfordian mudstone 

    Garitte, Benoit; Vaunat, Jean; Gens Solé, Antonio; Armand, G. (2010)
    Text en actes de congrés
    Accés obert
    In order to improve the understanding of the thermo-hydro-mechanical (THM) behaviour of the Callovo-Oxfordian Clay, an in situ heating test (TER experiment) has been realized by ANDRA at Meuse/Haute Marne URL during the ...
  • A constitutive model for soft clayey rocks that includes weathering effects 

    Pinyol Puigmartí, Núria Mercè; Vaunat, Jean; Alonso Pérez de Agreda, Eduardo (Institution of Civil Engineers (http://www.ice.org.uk/), 2007)
    Article
    Accés obert
    Microstructural and mineralogical observations of claystones reveal the presence of clay aggregates bonded by a skeleton of inert minerals such as calcium carbonate. The behaviour of these natural materials evolves from ...
  • A cross-anisotropic formulation for elasto-plastic models 

    Mánica Malcom, Miguel Ángel; Gens Solé, Antonio; Vaunat, Jean; Ruiz Restrepo, Daniel Felipe (2016-06)
    Article
    Accés restringit per política de l'editorial
    A cross-anisotropic formulation for elasto-plastic constitutive models based on a non-uniform scaling of the stress tensor is described. Taking advantage of the material symmetries characterising cross-anisotropy, only two ...
  • A microstructural model on the link between change in pore size distribution and wetting induced deformation in a compacted silt 

    Casini, Francesca; Vaunat, Jean; Romero Morales, Enrique Edgar (American Society of Civil Engineers (ASCE), 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The water retention curve expressed in terms of water content or degree of saturation and suction is hysteretic, stress path dependent (on void ratio), and depends on pore network. To properly describe its evolving nature, ...
  • Analysis of strain localization with a non-local plasticity model 

    Mánica Malcom, Miguel Ángel; Gens Solé, Antonio; Vaunat, Jean; Ruiz Restrepo, Daniel Felipe (2017)
    Text en actes de congrés
    Accés obert
    Strain localization can be defined as the accumulation of deformations in narrow zones, in the form of shear bands or cracks, commonly observed in several geomaterials like concrete, rocks, dense sands, or stiff fine-grained ...
  • Analysis of the excavation of a deep drift in a tertiary clay 

    Vaunat, Jean; Gens Solé, Antonio; de Vasconcelos, R.; Li, X.-L. (International Centre for Computational Engineering, 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This paper tackles the issues related to the excavation of a horizontal gallery carried out in Boom clay, a tertiary clay that hosts the Underground Laboratory of the Belgium Nuclear Agency (SCK-CEN). The gallery is 85 m ...
  • Analysis of the hydration of an unsaturated seal 

    Ruiz Restrepo, Daniel Felipe; Vaunat, Jean; Gens Solé, Antonio; Mánica Malcom, Miguel Ángel (American Society of Civil Engineers (ASCE), 2018)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The 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 modeling ...
  • An interior - point algorithm for hyper-plastic models for soils 

    Samat, Sergio; Vaunat, Jean; Gens Solé, Antonio (2009)
    Text en actes de congrés
    Accés obert
    In numerical analysis of geotechnical problems it is often necessary to use sophisticated elastoplastic constitutive models. Particularly, the presence of friction as the fundamental mechanism to dissipate energy provides ...
  • Anisotropic failure criterion for an argillaceous rock: formulation and application to an underground excavation case 

    Mánica, Miguel A.; Gens Solé, Antonio; Vaunat, Jean; Ruiz, Daniel F. (CIMNE, 2015)
    Comunicació de congrés
    Accés obert
  • Anisotropy effects in a deep excavation in stiff clay 

    Vaunat, Jean; Gens Solé, Antonio; Barboza De Vasconcelos, Ramon (2013)
    Text en actes de congrés
    Accés obert
    This paper tackles the issues related to the excavation of a horizontal gallery carried out in Boom clay, a tertiary clay that hosts the Underground Laboratory of the Belgium Nuclear Agency (SCK-CEN). The gallery is 85 m ...
  • Applications of multiphysical geomechanics in underground nuclear waste storage 

    Gens Solé, Antonio; Garitte, Benoit; Olivella Pastallé, Sebastià; Vaunat, Jean (Lavoisier Éditions, 2009)
    Article
    Accés obert
    Deep geological disposal in suitable host rocks is the favoured strategy for the storage and disposal of heat-emitting high level nuclear waste. A rational design of repositories requires a good understanding of the ...
  • A procedure for the direct determination of Bishop's chi parameter from changes in pore size distribution 

    Vaunat, Jean; Casini, F. (Thomas Telford, 2017-07)
    Article
    Accés obert
    Most of the recent works relating to the concept of effective stress in unsaturated soils focus on the proposal by Bishop, and, more particularly, on the search for suitable relationships between Bishop's ¿ parameter and ...
  • A time-dependent anisotropic model for argillaceous rocks: application to an underground excavation in Callovo-Oxfordian claystone 

    Mánica Malcom, Miguel Ángel; Gens Solé, Antonio; Vaunat, Jean; Ruiz Restrepo, Daniel Felipe (2017-05)
    Article
    Accés restringit per política de l'editorial
    The 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 ...
  • Caracterización experimental de la respuesta al corte de aridos para Balasto 

    Vaunat, Jean (Universitat Politècnica de Catalunya, 2014-12-09)
    Projecte Final de Màster Oficial
    Accés obert
    "Si el ferrocarril lograba sobreponerse a las adversidades del siglo XX pasaría a ser el medio de transporte del siglo XXI", se ha dicho en varias ocasiones. Esto puede verse reflejado en el crecimiento que han experimentado ...
  • Class A prediction of a mine-by test in an overconsolidated mudstone 

    Garitte, Benoit; Vaunat, Jean; Gens Solé, Antonio; Vietor, Tim (AEDIFICATIO PUBLISHERS, 2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this paper, 3D HM computations are performed to predict the rock response during the excavation of a new gallery (mine-by test) realized in Opalinus clay at the Mont- Terri laboratory, Switzerland. In a first part, ...
  • Comparative study of three in-situ heating test of anisotropic media: the HE-D, TER and ATLAS experiments 

    Garitte, Benoit; Sillen, X.; Li, XiangLing; Gilles, Armand; Vaunat, Jean; Gens Solé, Antonio (2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The paper presents an interpretation ofthe Thermo-Hydro-Mechanical (THM) behaviour of three clays in three in-situ heating tests. First, the in-situ measurements are explored and common rock features are identified. Then ...
  • Coupled analysis of a backfill hydration test 

    Alonso Pérez de Agreda, Eduardo; Lloret Morancho, Antonio; Delahaye, Carlos Héctor; Vaunat, Jean; Gens Solé, Antonio; Volckaert, G. (Wiley, 1998)
    Article
    Accés obert
    BACCHUS2 in situ isothermal wetting experiment has been analysed by means of a coupled flow-deformation approach. Backfill material, a mixture of Boom clay powder and high density pellets, has been extensively tested in ...
  • Coupled analysis of an in situ experiment in a soft argillaceous rock using a new constituive model 

    Vaunat, Jean; Garitte, Benoit; Gens Solé, Antonio (Taylor and Francis, 2006)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The paper addresses the issue of the description of the coupled thermo-hydro-mechanical behaviour of argillaceous rocks. A constitutive law, developed for this type of materials, is firstly described. It is based on an ...
  • Coupled thermo-hydraulic pulse tests on two reference Belgian clay formations 

    Oliveira Lima, Ana Carolina; Romero Morales, Enrique Edgar; Gens Solé, Antonio; Vaunat, Jean; Li, X.L. (CRC, 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Boom and Ypresian clays are being studied in Belgium in connection with the design of a repository for radioactive waste. Within this context, thermal impact may play an important role on the behaviour of these low-permeability ...
  • Determination of the thermal parameters of a clay from heating cell tests 

    Romero Morales, Enrique Edgar; Lima Amorim, Analice França; Gens Solé, Antonio; Vaunat, Jean; Li, X. L. (2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Boom Clay is being studied in Belgium in connection with the design of a repository for radioactive waste. Within this context, thermal impact may play an important role on the behaviour of this low-permeability clay. To ...