Now showing items 1-20 of 81

  • 3D DEM simulations of CPT in sand 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2012)
    Conference report
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    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 ...
  • Analysis of ground movements induced by diaphragm wall installation 

    Garitte, Benoit; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (CRC Press, 2010)
    Conference report
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    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 ...
  • 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
    Open Access
    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 ...
  • 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)
    Conference report
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    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)
    Conference report
    Open Access
    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
    Open Access
    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)
    Conference report
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    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)
    Conference report
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  • 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)
    Conference report
    Open Access
    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)
    Conference report
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    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 ...
  • Automation and control in a submarine drill rig 

    Arriaga, Aldo; Devincenzi, M.; Pérez, N.; Deu, A.; Arroyo Alvarez de Toledo, Marcos (Society for Underwater Technology, 2017)
    Conference report
    Open Access
    Remotely operated submarine drills are gaining acceptance as offshore geotechnical investigation tools for they provide a more convenient and often cheaper solution to geotechnical drilling vessels. The MD500 is an underwater ...
  • 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)
    Conference report
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  • 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
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    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
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    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 ...
  • Coupled CFD–DEM method for undrained biaxial shear test of methane hydrate bearing sediments 

    Jiang, Mingjing; Shen, Zhifu; Zhou, Wei; Arroyo Alvarez de Toledo, Marcos; Zhang, Wangcheng (2018-11)
    Article
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    Methane hydrate (MH), a potential source of future energy, is extensively deposited in marine sediments. It is essential to understand the mechanical properties of methane hydrate bearing sediments (MHBS) for applications ...
  • Coupled effective stress analysis of insertion problems in geotechnics with the Particle Finite Element Method 

    Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Carbonell Puigbó, Josep Maria; Gens Solé, Antonio (Elsevier, 2018-09)
    Article
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    This paper describes a computational framework for the numerical analysis of quasi-static soil-structure insertion problems in water saturated media. The Particle Finite Element Method is used to solve the linear momentum ...
  • 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)
    Conference report
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    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
    Open Access
    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 modelling of dynamic penetration in granular material 

    Zhang, Ming; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Ciantia, Matteo O. (CRC Press, 2018)
    Conference lecture
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    Dynamic penetration has been widely employed in some site investigation procedures and for the installation of driven piles. A 3-dimensional discrete element method model has been developed to simulate dynamic rod penetration ...
  • 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
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    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 ...