Now showing items 21-40 of 67

  • Coupled THMC analysis in porous media 

    Gens Solé, Antonio; Guimarães, Leonardo do N; Olivella Pastallé, Sebastià (IFSTTAR, 2011)
    Conference report
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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 ...
  • Coupled THM modelling of engineered barriers for the final disposal of spent nuclear fuel isolation 

    Toprak, Erdem; Olivella Pastallé, Sebastià; Pintado, X. (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 ...
  • 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
    Restricted access - publisher's policy
    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, Meritxell; Massana, Jordi; Carrera Ramírez, Jesús; Saaltink, Maarten Willem; Olivella Pastallé, Sebastià; Ayora Ibáñez, Carlos; Lloret Morancho, Antonio (Elsevier, 2011-01)
    Article
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
    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
    Restricted access - publisher's policy
  • 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
    Restricted access - publisher's policy
    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 (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 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 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 ...
  • Geotecnia : problemas resueltos : mecánica de suelos 

    Olivella Pastallé, Sebastià; Josa Garcia-Tornel, Alejandro; Valencia Vera, Francisco Javier (Edicions UPC, 2003)
    Book
    Restricted access to UB, UAB, UPC, UPF, UdG, UdL, URV, UOC, BC, UVic, UJI, URL, UIC users
    Esta publicación contiene una colección de problemas resueltos de mecánica de suelos. Se trata de una publicación de utilidad para los alumnos que cursan las asignaturas básicas de Geotecnia en los estudios de Ingeniería ...
  • Hydro-chemical modelling of in situ behaviour of bituminized radioactive waste in Boom Clay 

    Mokni, Nadia; Olivella Pastallé, Sebastià; Valcke, Elie; Bleyen, N; Smets, Esteven; Li, Xiang Ling; Sillen, X. (2014-06)
    Article
    Open Access
    The hydro-chemical (CH) interaction between swelling Eurobitum bituminized radioactive waste (BW) and Boom Clay was investigated to assess the feasibility of geological disposal for the long-term management of this waste. ...
  • Hydro-chemo-mechanical modelling of tunnels in sulfated rocks 

    Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià (Thomas Telford, 2017-11)
    Article
    Open Access
    A modelling procedure to address the tunnel–anhydritic rock interaction is described in this paper. The model incorporates the basic physico-chemical phenomena involved in rock swelling, often observed during excavation ...
  • Impacts of cold CO2 injection in deep saline aquifers on the rock mechanical integrity. 

    Vilarrasa Riaño, Víctor; Carrera Ramírez, Jesús; SILVA, ORLANDO; Olivella Pastallé, Sebastià (2013)
    Conference report
    Restricted access - publisher's policy
    Injecting CO2 into aquifers at depths greater than 800 m brings CO2 to a supercritical state where its density is large enough to ensure an efficient use of pore space. However, CO2 may not be in thermal equilibrium with ...