Now showing items 21-40 of 82

    • Constitutive model developments for compacted unsaturated fine grained soils based on porosimetry 

      Salgueiro, René; Olivella Pastallé, Sebastià; Suriol Castellví, Josep (Taylor & Francis, 2010)
      Conference report
      Restricted access - publisher's policy
      Modeling the mechanical behavior of compacted unsaturated soils against stress and suction changes is complex. One reason is that the structure mostly depends on the initial moisture content and compaction energy applied. ...
    • Copper canister shearing in spent nuclear fuel repository using Bodner–Partom model 

      Khadivipanah, Peiman; Pintado, Xavier; Olivella Pastallé, Sebastià; Vaunat, Jean (Elsevier, 2020-05)
      Article
      Restricted access - publisher's policy
      This paper describes the implementation of the Bodner–Partom model for the analysis of copper corrosion barrier in canisters containing spent nuclear fuel. The Bonder–Partom constitutive model implemented in CODE_BRIGHT ...
    • Coupled analysis of chemo-mechanical processes 

      Gens Solé, Antonio; Guimarães, Leonardo do N; Fernandez, A.M.; Olivella Pastallé, Sebastià; Sánchez, M. (ISTE Wiley, 2008)
      Conference report
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    • Coupled phenomena induced by freezing in a granular material 

      Casini, Francesca; Gens Solé, Antonio; Olivella Pastallé, Sebastià; Viggiani, Giulia M.B. (2013)
      Conference report
      Restricted access - publisher's policy
      Artificial Ground Freezing (AGF) is a controllable process that can be used by engineers to stabilise temporarily the ground, provide structural support and/or exclude groundwater from an excavation until construction of ...
    • Coupled THM modelling of engineered barriers for the final disposal of spent nuclear fuel isolation 

      Toprak, Erdem; Olivella Pastallé, Sebastià; Pintado Llurba, Xavier (London: The Geological Society, 2016-09)
      Article
      Open Access
      This paper describes the thermohydromechanical (THM) simulation of engineered barrier systems (EBS) for the final disposal of nuclear spent fuel in Finland. The bentonite barriers were simulated with the Barcelona Basic ...
    • Coupled THMC analysis in porous media 

      Gens Solé, Antonio; Guimarães, Leonardo do N; Olivella Pastallé, Sebastià (IFSTTAR, 2011)
      Conference report
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      A coupled thermo-hydro-mechanical-chemical (THMC) formulation is presented. The formulation combines a THM approach already existing and operational with the equations of reactive transport in a fully coupled manner. The ...
    • Coupled THMC modeling of unsaturated swelling clays: constitutive formulation and boundary value problems 

      Guimarães, Leonardo do N; Gens Solé, Antonio; Sánchez, Marcelo; Olivella Pastallé, Sebastià (Taylor & Francis, 2009)
      Conference report
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      An appropriate understanding of the interaction and effects of thermal, hydraulic, mechanical and chemical (THMC) phenomena occurring in compacted swelling clay is greatly assisted by the development and use of coupled ...
    • Development of a predictive framework for geothermal and geotechnical responses in cold regions experiencing climate change 

      Nishimura, S.; Jardine, R.; Fenton, C.H.; Olivella Pastallé, Sebastià; Gens Solé, Antonio; Martin, C.J. (2013)
      Conference report
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      Cold regions, which are expected to suffer particularly severe future climate effects, will pose very challenging geotechnical conditions in the 21st century involving ground freezing and thawing. Given the uncertainty of ...
    • Dynamics of water vapor flux and water separation processes during evaporation from a salty dry soil 

      Gran Esforzado, Meritxell; Massana, Jordi; Carrera Ramírez, Jesús; Saaltink, Maarten Willem; Olivella Pastallé, Sebastià; Ayora Ibáñez, Carlos; Lloret Morancho, Antonio (Elsevier, 2011-01)
      Article
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      Evaporation from a salty soil generates salt accumulation near the surface with the subsequent deterioration of the soil quality. Salinization mechanisms are poorly understood despite their global impact. Vapor flux and ...
    • Effect of thermo-coupled processes on the behaviour of a clay barrier submitted to heating and hydration 

      Sánchez, M.; Gens Solé, Antonio; Olivella Pastallé, Sebastià (2010)
      Article
      Open Access
      The storage of high level radioactive waste is still an unresolved problem of the nuclear industry, being geological disposal the most favoured option and, naturally, the one requiring the strongest geo-mechanical input. ...
    • Environmental effects on earth embankments 

      Olivella Pastallé, Sebastià; Alonso Pérez de Agreda, Eduardo (CRC Press, 2012)
      Part of book or chapter of book
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      Two real cases: the potential effect of an induced infiltration in the vicinity of an embankment founded on potentially collapsible natural silts and the effect of rainfall regime on a canal founded on cemented collapsible ...
    • 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 ...
    • Extension of CODE_BRIGHT to simulate non-isothermal CO2 injection in deep saline aquifers 

      Vilarrasa Riaño, Víctor; Olivella Pastallé, Sebastià; Silva Rojas, Orlando Enrique; Carrera Ramírez, Jesús (Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica (ETCG), 2012)
      Conference report
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    • Formulation for the THMC analysis of clayey materials: application to radioactive waste disposal 

      Gens Solé, Antonio; Guimarães, Leonardo do N; Fernández, A.M.; Sánchez, M.; Olivella Pastallé, Sebastià (American Society of Civil Engineers (ASCE), 2008)
      Conference report
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      A fully coupled formulation combining reactive transport and an existing thermo-hydro-mechanical (THM) code is briefly described. Special attention has been given to phenomena likely to be encountered in clay barriers used ...
    • Fully coupled thermo-hydro-mechanical double-porosity formulation for unsaturated soils 

      Sánchez, Marcelo; Gens Solé, Antonio; Victoria Villar, María; Olivella Pastallé, Sebastià (2016-12)
      Article
      Open Access
      This work presents a fully coupled formulation developed to handle engineering problems in unsaturated (and saturated) soils that present two dominant void levels. The proposed framework assumes the presence of two porous ...
    • Gas flow through clay barriers 

      Olivella Pastallé, Sebastià; Alonso Pérez de Agreda, Eduardo (2008-04)
      Article
      Open Access
      A model for the simulation of gas flow in clayey rocks and clays is described. Gas migration is associated with the development of preferential paths along existing or pressure-dependent discontinuities. The model handles ...
    • Gas flow through clay barriers 

      Olivella Pastallé, Sebastià; Alonso Pérez de Agreda, Eduardo (Institution of Civil Engineers (http://www.ice.org.uk/), 2008)
      Article
      Open Access
      A model for the simulation of gas flow in clayey rocks and clays is described. Gas migration is associated with the development of preferential paths along existing or pressure-dependent discontinuities. The model handles ...
    • Gas migration in sand/bentonite mixtures through preferential paths 

      Arnedo Gaute, Diego; Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià; Romero Morales, Enrique Edgar (2011)
      Conference report
      Restricted access - publisher's policy
      Sand/bentonite mixtures are considered as buffer material in low and medium radioactive waste disposal schemes. While the bentonite provides low permeability and swelling capacity, the sand is intended to improve mechanical ...
    • Geomechanical response of fractured reservoirs 

      Zareidarmiyan, Ahmad; Salaridad, Hossein; Vilarrasa Riaño, Víctor; De Simone, Silvia; Olivella Pastallé, Sebastià (2018-12)
      Article
      Open Access
      Geologic carbon storage will most likely be feasible only if carbon dioxide (CO2) is utilized for improved oil recovery (IOR). The majority of carbonate reservoirs that bear hydrocarbons are fractured. Thus, the geomechanical ...
    • Geomechanical stability of the caprock during CO2 sequestration in deep saline aquifers 

      Vilarrasa Riaño, Víctor; Olivella Pastallé, Sebastià; Carrera Ramírez, Jesús (2011)
      Article
      Open Access
      Sequestration of carbon dioxide (CO2) in deep saline aquifers has emerged as a mitigation strategy for reducing greenhouse gas emissions to the atmosphere. The large amounts of supercritical CO2 that need to be injected ...