Now showing items 41-60 of 81

  • Marchetti flat dilatometer tests in a virtual calibration chamber 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Amoroso, Sara; Gens Solé, Antonio (2018-09)
    Article
    Restricted access - publisher's policy
    Calibration chambers are frequently used to verify, adapt, or both verify and adapt empirical relations between different state variables and in situ test results. Virtual calibration chambers (VCC) built with 3D discrete ...
  • Mechanical and Thermal DEM analyses of baled MSW storage 

    Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem (International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2017)
    Conference report
    Restricted access - publisher's policy
    Municipal solid waste is sometimes stored in baled form either before or after treatment. General design requirements for MSW landfills, such as slope stability and lining long-term integrity are still relevant for bale ...
  • Modelling of Jet Grouting and its interactions with surrounding soils 

    Gesto Beiroa, José Manuel; Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos (2012)
    Conference report
    Restricted access - confidentiality agreement
    The versatility of Jet-Grouting as a soil improvement technique has made this procedure to be widely used in geotechnical engineering practice. In this work we discuss some aspects related to the THMC coupling phenomena ...
  • Modelling the behaviour of structured London Clay 

    González, Nubia Aurora; Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos; Rouainia, Mohamed (Hanrimwon, 2011)
    Conference report
    Restricted access - publisher's policy
    The paper presents a constitutive modelling of the London clay based on the detailed laboratory knowledge gathered about London clay structure (Hight et al, 2007; Gasparre et al, 2007; Gasparre & Coop, 2008). Modelling was ...
  • Multi-scale analysis of cone penetration test (CPT) in a virtual calibration chamber 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; O'Sullivan, Catherine (2014-01)
    Article
    Restricted access - publisher's policy
    A virtual calibration chamber was developed using a three-dimensional (3D) discrete element method (DEM) to perform cone penetration tests (CPTs) on a discrete analogue of Ticino sand. The macroscale response of the DEM ...
  • Numerical evaluation of three non-coaxial kinematic models using the distinct element method for elliptical granular materials 

    Jiang, M.J.; Liu, J.D.; Arroyo Alvarez de Toledo, Marcos (2016-12)
    Article
    Open Access
    This paper presents a numerical evaluation of three non-coaxial kinematic models by performing Distinct Element Method (DEM) simple shear tests on specimens composed of elliptical particles with different aspect ratios of ...
  • Numerical simulation of penetration problems in geotechnical engineering with the particle finite element method (PFEM) 

    Monforte Vila, Lluís; Carbonell Puigbó, Josep Maria; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2015)
    Conference report
    Open Access
    This paper highlights a computational framework for the numerical analysis of saturated soil-structure interaction problems. The variational equations of linear momentum and mass balance are obtained for the large deformation ...
  • Numerical simulation of THMC phenomena associated with jet-grouting 

    Gesto Beiroa, José Manuel; Gens Solé, Antonio; Arroyo Alvarez de Toledo, Marcos (Research Publishing, 2012)
    Conference report
    Restricted access - publisher's policy
    A framework for the study of the jet-grouting hydration reaction and of the associated THMC interactions with the surrounding soils has been developed. In this work, we summarize the basic formulation that may be used for ...
  • Numerical simulation of undrained insertion problems in geotechnical engineering with the Particle Finite Element Method (PFEM) 

    Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Carbonell Puigbó, Josep Maria; Gens Solé, Antonio (Elsevier, 2017-02)
    Article
    Open Access
    The paper presents total-stress numerical analyses of large-displacement soil-structure interaction problems in geomechanics using the Particle Finite Element Method (PFEM). This method is characterized by frequent remeshing ...
  • Observations of tool wear and excavation performance in urban tunnels 

    González Paez, Claudia; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2016)
    Conference report
    Restricted access - publisher's policy
    One of the most important predictions in a mechanized excavation project is the performance of the excavation Rostami et al., (1994), Bilgin & Balci, (2005). To obtain an efficient ground excavation in mechanized excavation ...
  • Particle failure in DEM models of crushable soil response 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Calvetti, Francesco (CRC Press Taylor & Francis Group, 2014)
    Conference report
    Restricted access - publisher's policy
    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 ...
  • Performance of mixed formulations for the particle finite element method in soil mechanics problems 

    Monforte, LLuís; Carbonell Puigbó, Josep Maria; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Springer, 2017-07)
    Article
    Open Access
    This paper presents a computational framework for the numerical analysis of fluid-saturated porous media at large strains. The proposal relies, on one hand, on the particle finite element method (PFEM), known for its ...
  • Periodic cells for large-scale problem initialization 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Zhang, Ningning; Emam, Sacha (EDP Sciences, 2017)
    Conference report
    Open Access
    In geotechnical applications the success of the discrete element method (DEM) in simulating fundamental aspects of soil behaviour has increased the interest in applications for direct simulation of engineering scale boundary ...
  • Permeability estimates from CPTu: a numerical study 

    Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Parolini, C. (CRC Press, 2018)
    Conference report
    Restricted access - publisher's policy
    Realistic numerical simulations of CPTu in soft soils are now becoming possible thanks to methods like the Particle Finite Element Method (PFEM). They may be used to systematically explore the traditional methods of CPTu ...
  • Plasticity for crushable granular materials via DEM 

    Gens Solé, Antonio; Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos (CIMNE, 2015)
    Conference report
    Open Access
    The mechanical behavior of crushable granular materials is characterized by strong non-linearity and irreversibility. In this paper, the incremental behavior of crushable granular soils is investigated by numerically ...
  • Probing DEM specimen heterogeneity by simulated CPT 

    Butlanska, Joana; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (CRC Press, 2014)
    Conference report
    Restricted access - publisher's policy
    A standard procedure for specimen formation in DEM simulations is the radius expansion method. Initialization of stress and density is performed by means of a servo-controlled procedure in which the wall boundaries of the ...
  • Production, performance and maintenance time observations in mixed soil-rock EPB drives 

    González Paez, Claudia; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (IOS Press, 2015)
    Conference report
    Restricted access - publisher's policy
    Mechanized excavation in soft rock has been extensively studied in the field of mining when machines such as roadheaders are used. During this time, Tunnel Boring Machines (TBMs) have been the ideal machines for working ...
  • SBPM testing in Bothkennar clay: structure effects 

    Arroyo Alvarez de Toledo, Marcos; González, Nubia Aurora; Butlanska, Joanna; Gens Solé, Antonio; Dalton, C (Taylor & Francis, 2008)
    Conference report
    Restricted access - publisher's policy
    A series of self-boring pressuremeter tests performed in Bothkennar clay are simulated using a finite element model of undrained cavity expansion. A bonded elasto plastic soil model is employed to represent Bothkennar clay ...
  • SDMT-based numerical analyses of deep excavation in soft soil 

    Mariano, Alessandra di; Amoroso, Sara; Arroyo Alvarez de Toledo, Marcos; Monaco, Paola; Gens Solé, Antonio (2019-01)
    Article
    Open Access
    The paper explores the application of conventional (DMT) and seismic (SDMT) dilatometer tests to an important case of deep excavation design. The work presents finite-element analyses simulating a deep excavation close to ...
  • Sensitivity to damping in sand production DEM-CFD coupled simulations 

    Climent Pera, Natalia; Arroyo Alvarez de Toledo, Marcos; O'Sullivan, Catherine; Gens Solé, Antonio (American Institute of Physics Conference Proceeding, 2013)
    Conference report
    Restricted access - publisher's policy
    A three dimensional numerical model based on Discrete Element Method (DEM) and coupled with Computational Fluid Dynamics (CFD) was implemented to simulate sand production. Simulations with no fluid flow conditions and with ...