Ara es mostren els items 1-20 de 61

  • 3D DEM simulations of CPT in sand 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The paper contains an overview of the results obtained in a research project exploring the ability of 3D DEM models to reproduce cone penetration in sands. The sand whose behaviour is mimicked by the discrete material ...
  • A new efficient strategy to simulate particle breakage in DEM analyses 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Calvetti, Francesco (2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The discrete element method (DEM) is increasingly gaining acceptance as a modelling tool for engineering problems of direct geotechnical relevance. One area for which the method seems naturally well adapted is that of ...
  • A new strategy to simulate particle crushing in DEM analysis 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Calvetti, Francesco (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2014)
    Text en actes de congrés
    Accés obert
    The discrete element method (DEM) is progressively gaining acceptance as a modelling tool for engineering problems of direct geotechnical relevance. One area for which the method seems naturally well adapted is that of ...
  • A numerical investigation of the incremental behavior of crushable granular soils 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Calvetti, Francesco; Gens Solé, Antonio (2016-09)
    Article
    Accés obert
    The mechanical behavior of granular materials is characterized by strong nonlinearity and irreversibility. These properties have been differently described by a variety of constitutive models. To test any constitutive ...
  • A practical method for suction estimation in unsaturated soil testing 

    Amaral, M.F.; Viana da Fonseca, A.; Romero Morales, Enrique Edgar; Arroyo Alvarez de Toledo, Marcos (CRC Press, 2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    This research presents an alternative methodology to estimate suction in triaxial tests carried out under constant water content. A preliminary determination of the retention curve is proposed using two complementary ...
  • A soft-rock model for cement-improved clays 

    Arroyo Alvarez de Toledo, Marcos; Ciantia, M.; Castellanza, R.; Gens Solé, Antonio (IOS Press, 2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
  • A structured constitutive model for simulating the behaviour of an overconsolidated bonded clay 

    González, Nubia Aurora; Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos; Rouainia, Mohamed (Centro Internacional de Métodos Numéricos en Ingeniería (CIMNE), 2011)
    Text en actes de congrés
    Accés obert
    The paper presents some improvements in the formulation of a kinematic hardening constitutive soil model incorporating structure initially proposed for soft clays. For the modelling of overconsolidated bonded clay the ...
  • A submersible drill rig for coring soils and rocks 

    Devincenzi, M.J.; Pérez Garcia, N.; Samoili, K.; Arroyo Alvarez de Toledo, Marcos (2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The paper describes the design and initial field-testing of a remotely operated submersible drill rig able to obtain continuous cores of soil and/or rock up to 6 m long. The rig mast angle is hydraulically actuated covering ...
  • An Approach to enhance efficiency of DEM modelling of soils with crushable grains 

    Ciantia, Matteo; Arroyo Alvarez de Toledo, Marcos; Calvetti, Francesco; Gens Solé, Antonio (Thomas Telford, 2015-02)
    Article
    Accés obert
    In this study oedometric compression tests of hydrocarbon coke, Fontainebleau sand and silica sand are simulated in three dimensions using breakable particles. The method adapts a rigorous breakage criterion for elasto-brittle ...
  • Analysis of ground movements induced by diaphragm wall installation 

    Garitte, Benoit; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (CRC Press, 2010)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The construction process of diaphragm walls can lead to movements in the surrounding area that are seldom taken into account. However, these movements may be important in situations where soft soils dominate. In this ...
  • Cimentación directa para eólica marina 

    Arroyo Alvarez de Toledo, Marcos; Alcoverro Bassols, Jordi; Abadías, David; Gens Solé, Antonio (Sociedad Española de Mecánica del Suelo e Ingeniería Geotécnica, 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
  • Compression and shear wave propagation in cemented sand specimens 

    Amaral, M.F.; Viana da Fonseca, A.; Arroyo Alvarez de Toledo, Marcos; Cascante, G.; Carvalho, J. (2011)
    Article
    Accés restringit per política de l'editorial
    Ultrasonic and bender element tests in the laboratory are typically used to measure elastic modulus and damping ratio. However, interpretation of the results is challenging for a variety of reasons, including the influence ...
  • Cone penetration tests in a virtual calibration chamber 

    Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Gens Solé, Antonio; Calvetti, Francesco; Jamiolkowski, Michael (2011)
    Article
    Accés restringit per política de l'editorial
    A virtual calibration chamber was built using a threedimensional model based on the discrete-element method. The chamber was then filled with a scaled granular equivalent of Ticino sand, the material properties of which ...
  • DEM modelling of a double-porosity crushable granular material 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Gens Solé, Antonio (CRC Press, 2014)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The effect of grain crushing during one dimensional compression and triaxial compression tests is investigated in a double-porosity granular material using the Discrete Element Method (DEM). Experimental tests results from ...
  • DEM modelling of cone penetration tests in a double-porosity crushable granular material 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Butlanska, Joanna; Gens Solé, Antonio (2016-03)
    Article
    Accés restringit per política de l'editorial
    A three-dimensional discrete element model is used to investigate the effect of grain crushing on the tip resistance measured by cone penetration tests (CPT) in calibration chambers. To do that a discrete analogue of pumice ...
  • DEM simulation of soil-tool interaction under extraterrestrial environmental effects 

    Jiang, Mingjing; Xi, Banglu; Arroyo Alvarez de Toledo, Marcos; Rodríguez Dono, Alfonso (2017-06)
    Article
    Accés restringit per política de l'editorial
    In contrast to terrestrial environment, the harsh lunar environment conditions include lower gravity acceleration, ultra-high vacuum and high (low) temperature in the daytime (night-time). This paper focuses on the effects ...
  • Design control and monitoring of a jet grouted excavation bottom plug 

    Eramo, N.; Modoni, Giuseppe; Arroyo Alvarez de Toledo, Marcos (CRC Press/Balkema, 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Jet grouting is adopted in different geotechnical conditions to ensure provisional earth retaining and waterproofing functions at the bottom and walls of excavations. Despite careful theoretical models avail-able to predict ...
  • Design of jet-grouting for tunnel waterproofing 

    Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Croce, Paolo; Modoni, Giuseppe (CRC Press/Balkema, 2012)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    A case history in Barcelona is described where a tunnel was excavated by traditional methods below an active railway line through a formation with lenses of water-bearing granular material. To avoid the possibility of ...
  • Effects of heating and hydraulic cycling on the stiffness response of a rigid ansiotropic clay: preliminary results 

    Mitaritonna, Giuseppina; Pineda, Jubert Edgar; Romero Morales, Enrique Edgar; Arroyo Alvarez de Toledo, Marcos (2009)
    Comunicació de congrés
    Accés obert
    The poster presents the results of an experimental investigation aimed at evaluating the effects of heating and hydraulic cycling on the small-strain stiffness of a rigid Jurassic clay (Opalinus clay, Jura Mountains, Mont ...
  • Engineering assessment of jet-grouted structures 

    Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (IOS Press, 2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The treatment characteristics, quality control measures and outcomes of two different jet-grout based soil treatments are described in detail. In the first one, a jet-grouted slab was built to limit retaining wall movements ...