Exploració per tema "Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls"

Ara es mostren els items 1-20 de 683

    • 3D analysis of H-M coupled problem with zero-thickness interface elements applied to geomechanics 

      Garolera Vinent, Daniel; Segura Serra, Josep Maria; Carol, Ignacio; Lakashmikhanta, Ramasesha; Alvarellos, J. (CIMNE, 2015)
      Comunicació de congrés
      Accés obert
      In spite of the significant developments seen in recent years,numerical modelin of Hydraulic Fracturing still poses major challenges due to the strong coupling between fluid flow and crack development,which is itself a ...

    • 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 ...

    • 3D simulations of gas injection on callovo-oxfordian claystone assuming spatial heterogeneity and anisotropy 

      Puig Damians, Ivan; Olivella Pastallé, Sebastià; Gens Solé, Antonio (Elsevier, 2022-11)
      Article
      Accés obert
      A series of gas injection tests on Callovo-Oxfordian (COx) claystone from the Bure underground research laboratory (URL) in France were carried out at the British Geological Survey (BGS). The tests were performed using a ...

    • A constitutive model for partially saturated soils 

      Alonso Pérez de Agreda, Eduardo; Gens Solé, Antonio; Josa Garcia-Tornel, Alejandro (Institution of Civil Engineers (http://www.ice.org.uk/), 1990)
      Article
      Accés obert
      The Paper presents a constitutive model for describing the stress-strain behaviour of partially saturated soils. The model is formulated within the framework of hardening plasticity using two imdependent sets of stress ...

    • 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 constitutive model for the accumulated strain of unsaturated soil under high-cycle traffic loading 

      Cao, Zhigang; Chen, Jingyu; Alonso Pérez de Agreda, Eduardo; Ramon Tarragona, Anna; Cai, Yuanqiang; Gu, Chuan; Zhang, Qi (2021-05)
      Article
      Accés obert
      The road base is normally situated above the water table and thus in unsaturated state. Experimental results show that the accumulated strains of the unsaturated road base aggregate under high-cycle traffic loads are ...

    • A contact model for rough crushable sand 

      Zhang, Ningning; Ciantia, Matteo Oryem; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (2021-06)
      Article
      Accés obert
      Sand roughness is now accessible to measurement. Incorporating this parameter into sand models using the discrete element method (DEM) is known to improve bulk small strain response. In this work we explore the effect on ...

    • A DECOVALEX-2011 benchmark: laboratory drying test in opalinus clay 

      Garitte, Benoit; Gens Solé, Antonio; Liu, Quansheng; Liu, Xiaoyan; Millard, Alain; Bond, Alex; McDermott, Chris; Fujita, Tomoo; Nakatama, Shigeo (2009)
      Text en actes de congrés
      Accés restringit per acord de confidencialitat
      In this paper, a benchmark exercise from the DECOVALEX-2011 project is presented. Experimental results from a laboratory drying test in Opalinus Clay are used. First, the DECO- V ALEX project and the teams of the benchmark ...

    • A densification mechanism to model the mechanical effect of methane hydrates in sandy sediments 

      de la Fuente Ruiz, María; Vaunat, Jean; Marín Moreno, Héctor (2020-04)
      Article
      Accés obert
      Recent pore-scale observations and geomechanical investigations suggest the lack of true cohesion in methane hydrate-bearing sediments (MHBSs) and propose that their mechanical behavior is governed by kinematic constrictions ...

    • A framework for the time-dependent behaviour of soft structured clays 

      Mánica Malcom, Miguel Ángel; Ovando-Shelley, Efrain; Jaramillo, Eduardo Botero; Gens Solé, Antonio; Vaunat, Jean (2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      From the combination of existing modelling approaches, a constitutive framework is presented for the numerical modelling of soft structured clays. The formulation accounts, in a natural way, for time-dependent phenomena ...

    • A full-scale in situ heating test in Callovo-Oxfordian claystone: observations, analysis and interpretation 

      Tourchi, Saeed; Vaunat, Jean; Gens Solé, Antonio; Bumbieler, F.; Vu, Minh-Ngoc; Armand, G. (Elsevier, 2021-05)
      Article
      Accés obert
      The paper describes the performance, observations and numerical interpretation of a full-scale in situ heating test conducted on Callovo-Oxfordian (COx) claystone in the Meuse / Haute-Marne (MHM) Underground Research ...

    • A mechanistic model (BCC-PSSICO) to predict changes in the hydraulic properties for bio-amended variably saturated soils 

      Carles Brangari, Albert; Sánchez Vila, Francisco Javier; Freixa Casals, Anna; Romani Cornet, Anna Maria; Rubol, Simonetta; Fernández García, Daniel (2017-01)
      Article
      Accés obert
      The accumulation of biofilms in porous media is likely to influence the overall hydraulic properties and, consequently, a sound understanding of the process is required for the proper design and management of many technological ...

    • A microstructural cam clay model for hydro-mechanical behavior of unsaturated soils 

      Cordao Neto, Manoel Porfirio; Lima Lopes, Bruna de Carvalho Faria; dos Anjos Mascarenha, Marcia Maria; Romero Morales, Enrique Edgar (2017-01)
      Article
      Accés restringit per política de l'editorial
      In this paper, two new state variables are included in a conventional elastoplastic model, Modified Cam-clay, to incorporate the influence of pore size distribution changes in the mechanical behavior of unsaturated soils. ...

    • 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, ...

    • A multi-scale insight into gas transport in a deep Cenozoic clay 

      González Blanco, Laura; Romero Morales, Enrique Edgar (2022-09)
      Article
      Accés obert
      The migration of gases is crucial to ensure the long-term feasibility of argillaceous formations for the deep disposal of radioactive waste. This paper presents an experimental investigation with a multi-scale perspective ...

    • A new approach to evaluate the soil disturbance due to tube sampling 

      Gens Solé, Antonio; Monforte Vila, Lluís; Arroyo Alvarez de Toledo, Marcos; Carbonell Puigbó, Josep Maria (2022)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Disturbance of specimens recovered by tube sampling from boreholes is an enduring relevant problem in geotechnical engineering. Practice has evolved slowly in this area, partly because the main research method applied, ...

    • A new approach to model geomaterials with heterogeneous properties in thermo-hydro-mechanical coupled problems 

      Rodríguez Dono, Alfonso; Zhou, Yunfeng; Olivella Pastallé, Sebastià (Elsevier, 2023-07)
      Article
      Accés obert
      The main objective of this article is to present a new approach to model coupled thermo-hydro-mechanical problems considering geomaterials with heterogeneous properties. This approach has been implemented in the software ...

    • A new double-porosity macroscopic model of bentonite free swelling 

      Navarro Gámir, Vicente; Cabrera Soto, Virginia; de la Morena Borja, Gema; Asensio Sánchez, Laura; Yustres Real, Ángel; Torres Serra, Joel (2022-08)
      Article
      Accés obert
      A macroscopic model based on a double-porosity approach is proposed to simulate the swelling caused by the subdivision of particles and aggregates that occurs when bentonites are hydrated under a high water content and low ...

    • A new modelling approach for unsaturated soils using independent stress variables 

      Sheng, Daichao; Fredlund, Delwyn G.; Gens Solé, Antonio (2008-04)
      Article
      Accés restringit per política de l'editorial
      Although a number of constitutive models for unsaturated soils exist in the literature, some fundamental questions have not been fully answered. There are questions related to (i) the change of the yield stress with soil ...

    • A nonlocal elasto-plastic model for structured soils at large strains for the particle finite element method 

      Monforte Vila, Lluís; Ciantia, Matteo Oryem; Carbonell Puigbó, Josep Maria; Arroyo Alvarez de Toledo, Marcos; Gens Solé, Antonio (Springer, 2021)
      Capítol de llibre
      Accés restringit per política de l'editorial
      This work presents a robust and mesh-independent implementation of an elasto-plastic constitutive model at large strains, appropriate for structured soils, into a Particle Finite Element code specially developed for ...