Now showing items 41-60 of 83

    • 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 ...
    • Induced seismicity in geologic carbon storage 

      Vilarrasa Riaño, Víctor; Carrera Ramírez, Jesús; Olivella Pastallé, Sebastià; Rutqvist, Jonny; Laloui, Lyesse (2019-06)
      Article
      Open Access
      Geologic carbon storage, as well as other geo-energy applications, such as geothermal energy, seasonal natural gas storage and subsurface energy storage imply fluid injection and/or extraction that causes changes in rock ...
    • Influence of suction on the mechanical behaviour of rock joints under shear loading 

      Zandarín, Maria Teresa; Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià (Taylor & Francis, 2010)
      Conference report
      Restricted access - publisher's policy
      A direct shear equipment was modified for testing rock joints with suction control. Modification includes a vapour forced convection circuit connected to the air chamber of shear cell for controlling relative humidity ...
    • Is the degree of saturation a good candidate for Bishop’s X parameter? 

      Pereira, J.M.; Coussy, Olivier; Alonso Pérez de Agreda, Eduardo; Vaunat, Jean; Olivella Pastallé, Sebastià (CRC Press, 2011)
      Conference report
      Restricted access - publisher's policy
      In unsaturated soil mechanics, the quest for an effective stress playing the same role as Terzaghi’s effective stress does for saturated soils has introduced a long standing debate, dating back to the 1960s. Several ...
    • Lechago dam. A case study 

      Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià; Pinyol Puigmartí, Núria Mercè (Universitat Politècnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-15)
      Conference lecture
      Open Access
      Lechago dam (Teruel, Spain) is a 40 m high zoned earth and rockfill dam sitting on soft continental deltaic deposits. A relatively narrow central clay core is stabilized by wide rockfill shoulders. The dam was well ...
    • Lechago dam: a case study 

      Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià; Pinyol Puigmartí, Núria Mercè (2011)
      Conference report
      Restricted access - publisher's policy
      Lechago dam (Teruel, Spain) is a 40 m high zoned earth and rockfill dam founded on soft continental deltaic deposits. A relatively narrow central clay core is stabilized by wide rockfill shoulders. The dam was completed ...
    • Mecánica de suelos : problemas resueltos 

      Olivella Pastallé, Sebastià (Edicions UPC, 1997)
      Book
      Restricted access to the UPC academic community
      Esta publicación contiene una colección de problemas resueltos de mecánica de suelos que ha sido preparada para los estudios de ingeniería técnica de obras públicas que se imparten en la UPC. Se trata de una titulación de ...
    • Mecánica de suelos : problemas resueltos 

      Olivella Pastallé, Sebastià (Edicions UPC, 2001)
      Book
      Restricted access to the UPC academic community
      Esta publicación contiene una colección de problemas resueltos de mecánica de suelos que ha sido preparada para los estudios de ingeniería técnica de obras públicas que se imparten en la UPC. Se trata de una titulación de ...
    • Mechanisms of gas transport in clay barriers 

      Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià; Arnedo Gaute, Diego (Universidad Complutense de Madrid, 2006)
      Article
      Open Access
      Laboratory experiments show that preferential paths develop through saturated impervious clay bodies. A procedure to integrate gas transmission discontinuities into a general THM formulation is described. The technique has ...
    • Microstructural and hydro-mechanical behaviour of bentonite pellets and powder mixtures 

      Mesa Alcantara, Arisleidy; Romero Morales, Enrique Edgar; Mokni, Nadia; Olivella Pastallé, Sebastià (EDP Sciences, 2020-10)
      Article
      Open Access
      Binary mixtures of high-density MX-80 bentonite pellets (80%) and bentonite powder (20%) at hygroscopic water content have been recently considered as an alternative engineered barrier system for the long-term disposal of ...
    • Modelación numérica de túneles excavados en rocas sulfatadas 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià (2017-09)
      Article
      Restricted access - publisher's policy
      Las expansiones ocurridas en el túnel de Lilla son el resultado del crecimiento de cristales de yeso en discontinuidades. Se describe un procedimiento de análisis numérico para el diseño de un túnel en roca anhidrítica ...
    • Modeling evaporation processes in a saline soil from saturation to oven dry conditions 

      Gran Esforzado, Meritxell; Carrera Ramírez, Jesús; Olivella Pastallé, Sebastià; Saaltink, Maarten Willem (2011)
      Article
      Open Access
      Thermal, suction and osmotic gradients interact during evaporation from a salty soil. Vapor fluxes become the main water flow mechanism under very dry conditions. A coupled nonisothermal multiphase flow and a reactive ...
    • Modelling 3D mechanical interfaces with continuum elements 

      Puig Damians, Ivan; Olivella Pastallé, Sebastià; Lloret Morancho, Antonio; Josa Garcia-Tornel, Alejandro; Bathurst, Richard (2013)
      Conference report
      Open Access
      This document presents preliminary results of FEM-numerical analysis of soil-reinforcement pullout tests. The numerical model has been developed with CODE_BRIGHT and assuming the interfaces as continuum materials. The ...
    • Modelling a gas flow experiment in Mx80 bentonite 

      Puig Damians, Ivan; Olivella Pastallé, Sebastià; Gens Solé, Antonio (International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2019)
      Conference report
      Restricted access - publisher's policy
      A gas injection test performed on compact bentonite was carried out at the British Geological Survey. The test is composed of two stages (i.e. hydration followed by gas injection). After gas breakthrough and a period of ...
    • Modelling advective gas flow in compact bentonite: lessons learnt from different numerical approaches 

      Tamayo Mas, Elena; Harrington, J. F.; Brüning, T.; Shao, H.; Dagher, E. E.; Lee, Jaewon; Kim, K.; Rutqvist, Jonny; Kolditz, Olaf; Lai, S. H.; Chittenden, C.; Wang, Y.; Puig Damians, Ivan; Olivella Pastallé, Sebastià (Elsevier, 2021-03)
      Article
      Open Access
      In a repository for radioactive waste hosted in a clay formation, hydrogen and other gases may be generated due to the corrosion of metallic materials under anoxic conditions, the radioactive decay of waste and the ...
    • Modelling engineered barriers for spent nuclear fuel repository using a double-structure model for pellets 

      Toprak, Erdem; Olivella Pastallé, Sebastià; Pintado, Xavier (2020-02)
      Article
      Open Access
      This paper describes an experimental programme and the corresponding modelling in order to characterise the hydromechanical (HM) behaviour of pellets. At least two levels of porosity can be distinguished in the pellets: ...