Now showing items 21-40 of 79

  • Design control and monitoring of a jet grouted excavation bottom plug 

    Eramo, N.; Modoni, Giuseppe; Arroyo Alvarez de Toledo, Marcos (CRC Press/Balkema, 2012)
    Conference report
    Restricted access - publisher's policy
    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)
    Conference report
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    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)
    Conference lecture
    Open Access
    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)
    Conference report
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    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 ...
  • Estrategias alternativas de caracterización geomecánica para el análisis numérico de excavaciones apantalladas 

    Sau, N.; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Sociedad Española de Mecánica del Suelo e Ingeniería Geotécnica, 2012)
    Conference report
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  • Evaluation of net thrust and torque on mixed-face EPB drives 

    González Paez, Claudia; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2015)
    Conference report
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    In this communication we propose a way to estimate net thrust and torque applied at the excavation front by cutting tools from EPB machines when they are working in mixed faces constituted by soils and soft rock. The ...
  • Evaluation of self-combustion risk in tire derived aggregate fills 

    Arroyo Alvarez de Toledo, Marcos; San Martin, Ignacio; Olivella Pastallé, Sebastià; Saaltink, Maarten Willem (2011-09)
    Article
    Restricted access - publisher's policy
    Lightweight tire derived aggregate (TDA) fills are a proven recycling outlet for waste tires, requiring relatively low cost waste processing and being competitively priced against other lightweight fill alternatives. However ...
  • Explicit finite deformation stress integration of the elasto-plastic constitutive equations 

    Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Carbonell Puigbó, Josep Maria (CRC Press Taylor & Francis Group, 2014)
    Conference report
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    In this work, an explicit integration scheme for hyperelastic-based finite strains elasto-plasticity is presented. One step update equations are obtained from the large deformation multiplicative elasto-plasticity theory, ...
  • Fluid effects in sand production simulations coupling DEM with CFD 

    Climent Pera, Natalia; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; O'Sullivan, Catherine (CRC Press Taylor & Francis Group, 2014)
    Conference report
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    Sand production around a wellbore is here simulated using a three dimensional numerical model based on Discrete Element Method (DEM) coupled with Computational Fluid Dynamics (CFD). The model is calibrated against a ...
  • Grading evolution and critical state in a discrete numerical model of Fontainebleau sand 

    Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; O'Sullivan, Catherine; Gens Solé, Antonio; Liu, T. (Thomas Telford, 2019-01)
    Article
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    Granular materials reach critical states upon shearing. The position and shape of a critical state line (CSL) in the compression plane are important for constitutive models, interpretation of in situ tests and liquefaction ...
  • Homogeneity and symmetry in DEM models of cone penetration 

    Butlanska, Joanna; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (American Institute of Physics (AIP), 2009)
    Conference report
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    A three—dimensional numerical model was implemented to PFC3D Code to simulate cone penetration test in Ticino sand in a calibration chamber. The model is calibrated using laboratory test results. The full/half/quarter ...
  • Hydraulic conductivity from piezocone on-the-fly: a numerical evaluation 

    Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Carbonell Puigbó, Josep Maria (Institution of Civil Engineers (ICE), 2018-12)
    Article
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    Permeability is important in many geotechnical applications. The current CPTu practice to obtain permeability values relies on dissipation tests, which are frequently slow and only linked to permeability through compressibility ...
  • Impermeable membranes for slab-track settlement mitigation 

    Pérez Romero, Joaquín; Arroyo Alvarez de Toledo, Marcos; Ciantia, Matteo Oryem; Vaunat, Jean (2018-08)
    Article
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    A 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 ...
  • Influence of some EPB operation parameters on ground movements 

    Mariano, Alessandra di; Persio, Roberto; Gens Solé, Antonio; Castellanza, Riccardo; Arroyo Alvarez de Toledo, Marcos (AEDIFICATIO PUBLISHERS, 2009)
    Conference report
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    Some of the details of EPB tunnelling are difficult to introduce in conventional numerical models, nevertheless there are some parameters that can be included in the analyses in a fairly easy way. The EPB operating ...
  • Integration of elasto-plastic constitutive models infinite deformation: an explicit approach 

    Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio; Carbonell Puigbó, Josep Maria (CIMNE, 2015)
    Conference report
    Open Access
    This paper highlights an explicit integration scheme for hyperelastic-based finite strains elasto-plastic models. One step update equations are obtained from the large deformation multiplicative elasto-plastic theory, where ...
  • Irreversible behaviour of crushable sands: a DEM study 

    Gens Solé, Antonio; Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos (2017)
    Conference report
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    The irreversible behaviour of crushable sands is investigated by means of a Discrete Element Method (DEM) analogue. The calculations have been performed using a recently developed procedure to simulate particle crushing ...
  • Macroelement modeling of SSI effects on offshore wind turbines subject to large number of loading cycles 

    Salciarini, Diana; Frizza, Martina; Tamagnini, Claudio; Arroyo Alvarez de Toledo, Marcos; Abadías Gómez, David (Elsevier, 2016)
    Conference report
    Open Access
    In this paper, the hypoplastic macroelement formulation proposed by [1] has been modified in order to extend its range of applicability to offshore structures subject to cyclic loads with very high number of cycles, with ...
  • Management of third-party risk in an urban deep excavation project 

    Arroyo Alvarez de Toledo, Marcos; Mariano, Di A; Gens Solé, Antonio; Alonso Pérez de Agreda, Eduardo; García-Fontanet, A; García-Germán, J (IOS Press, 2007)
    Conference report
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    This communication presents results from a case history in Barcelona involving a large cut-and-cover railway tunnel requiring a deep excavation (H > 20 m). The presence of a number of medium to high-rise buildings alongside ...
  • Mapping deformation during CPT in a virtual calibration chamber 

    Butlanska, Joanna; O'Sullivan, C.; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (CRC Press/Balkema, 2010)
    Conference report
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    This paper analyses results from a three dimensional discrete element method simulation of the cone penetration test in a "Virtual Calibration Chamber" (VCC). The deformation patterns in the soil adjacent to the cone ...
  • 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 ...