Ara es mostren els items 1-20 de 153

  • A 1-D Thermo-Hydro-Mechanical model of the middle section of canister retrieval test 

    Zandarín, Maria Teresa; Olivella Pastallé, Sebastià; Gens Solé, Antonio; Alonso Pérez de Agreda, Eduardo (2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    In this papera 1-D model simulation of the middle section of Canister Retrieval Test, conducted at the Áspo Hard Rock Laboratory, is presented. The model considers the MX-80 bentonite block, the bentonite-rock interface ...
  • 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 model for rockill compressibility 

    Oldecop, Luciano A.; Alonso Pérez de Agreda, Eduardo (Institution of Civil Engineers (http://www.ice.org.uk/), 2001)
    Article
    Accés obert
    The paper presents a macroscopic constitutive model for rockill that includes the effect of water on compressibility and collapse phenomena. Breakage of rock particles and fracture propagation are basic underlying mechanisms ...
  • A new high-pressure triaxial apparatus for inducing and tracking hydro-mechanical degradation of clayey rocks 

    Pineda Jiménez, Jubert Andrés; Romero Morales, Enrique Edgar; Alonso Pérez de Agreda, Eduardo; Pérez Revilla, Tomás (2014-11)
    Article
    Accés restringit per política de l'editorial
    This paper presents the development of a new high-pressure triaxial apparatus specifically prepared for inducing and tracking the degradation of clayey rocks. Total suction—used to induce the hydraulic degradation—is applied ...
  • A permafrost test on intact gneiss rock 

    Duca, S; Alonso Pérez de Agreda, Eduardo; Scavia, Claudio (Elsevier, 2015-07)
    Article
    Accés obert
    Changes in permafrost conditions in high mountain rocks have increased the risk of dangerous instabilities. Ice segregation within the rock mass has been interpreted as one of the mechanisms involved in high mountain bedrock ...
  • A review of Beliche Dam 

    Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià; Pinyol Puigmartí, Núria Mercè (Institution of Civil Engineers (http://www.ice.org.uk/), 2005)
    Article
    Accés obert
    Beliche Dam, a zoned earthdam with rockfill shouldersand a central clay core, experienced large collapse settlements due to reservoir impounding and direct action of rainfall. Long-term field records of vertical and ...
  • A review of expansive phenomena in Wagenburg North Tunnel 

    Berdugo de Moya, Iván Rafael; Alonso Pérez de Agreda, Eduardo; Romero Morales, Enrique Edgar; Gens Solé, Antonio; Albis, María (2009-12-31)
    Article
    Accés obert
    The paper deals on tunnelling and swelling in anhydritic-gypsiferous claystones. The geology of the Gipskeuper in Baden-Württemberg (Germany) and the phenomenology of expansions in Wagenburg North tunnel are described. ...
  • A rockfill triaxial cell with suction control 

    Chavez, C.; Romero Morales, Enrique Edgar; Alonso Pérez de Agreda, Eduardo (2009-05)
    Article
    Accés restringit per política de l'editorial
    This paper describes the development of a new triaxial cell specifically built to test coarse granular material under partially saturated conditions. The partial saturation is achieved by imposing a total suction that is ...
  • A simplified procedure to assess the dynamic stability of a caisson breakwater 

    Madrid, R.; Gens Solé, Antonio; Alonso Pérez de Agreda, Eduardo; Tarrago, Dani (2013)
    Text en actes de congrés
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    The paper describes a simplified method of analysis used to evaluate the stability of a caisson breakwater to sea wave actions. An intensive laboratory program was performed in order to evaluate the static and dynamic ...
  • A study of the effects of suction and roughness on the mechanical behaviour of rock joints 

    Zandarín, Maria Teresa; Alonso Pérez de Agreda, Eduardo; Olivella Pastallé, Sebastià (2011)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The experimental investigation focused on the effects of suction on the mechanical behaviour of rock joints. Available experimental data on the effect of moisture on joint behaviour is very scarce. Laboratory tests were ...
  • An undrained upper bound solution for the face stability of tunnels reinforced by micropiles 

    Pinyol Puigmartí, Núria Mercè; Alonso Pérez de Agreda, Eduardo (2013)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    Tunnel in difficult soils may require procedures to prevent tunnel face failures. Face stabilization can be achieved by the installation of some structural elements. This paper presents an analysis of face stability of ...
  • Analysis of a full scale in situ test simulating repository conditions 

    Gens Solé, Antonio; García Molina, Ángel; Olivella Pastallé, Sebastià; Alonso Pérez de Agreda, Eduardo; Huertas, F. (Wiley, 1998)
    Article
    Accés obert
    Coupled thermo-hydro-mechanical (THM) analyses have been used to examine the interacting phenomena associated with the simultaneous heating and hydration of an engineered bentonite barrier placed in a drift excavated in ...
  • Analysis of ettringite attack to stabilized railway bases and embankments 

    Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (2013)
    Comunicació de congrés
    Accés restringit per política de l'editorial
    Two cases of massive sulphate attack to cement treated embankments and track bases in a high speed railway line are described. In the first case, two large access embankments to a railway viaduct were treated with jet–grouting ...
  • Analysis of swelling in tunnels excavated in sulphate claystones 

    Berdugo de Moya, Iván Rafael; Guimarães, Leonardo do N; Alonso Pérez de Agreda, Eduardo; Gens Solé, Antonio; Romero Morales, Enrique Edgar (2009)
    Text en actes de congrés
    Accés restringit per política de l'editorial
    The paper summarizes the main phenomenological aspects of swelling in tunnels excavated in sulphate claystones and formulates a series of theoretical consideration for their coupled hydro-mechanical-chemical analysis. The ...
  • Análise do comportamento de solos não saturados a pequenas deformações 

    Mascarenha, Marcia Mª dos Anjos; Cordao Neto, Manoel Porfirio; Murrieta dos Santos Neto, Pedro; Romero Morales, Enrique Edgar; Alonso Pérez de Agreda, Eduardo (2008)
    Text en actes de congrés
    Accés obert
    Nos últimos anos tem aumentado o interesse no meio geotécnico em relação ao comportamento dos solos a pequenas deformações, sendo que a maioria das pesquisas estão relacionadas a solos saturados, não considerando a influência ...
  • Avances en la geotecnia de presas 

    Alonso Pérez de Agreda, Eduardo; Pinyol Puigmartí, Núria Mercè (2007)
    Text en actes de congrés
    Accés restringit per política de l'editorial
  • Aznalcóllar dam failure. Part 1: Field observations and material properties 

    Alonso Pérez de Agreda, Eduardo; Gens Solé, Antonio (Institution of Civil Engineers (http://www.ice.org.uk/), 2006)
    Article
    Accés obert
    The paper describes the failure of Aznalcóllar dam, in southern Spain, in April 1998. The rockfill dam slid forward and released a flow of acid-saturated tailings. The geology and geomorphology of the site are described. ...
  • Aznalcóllar dam failure. Part 2: Stability conditions and failure 

    Gens Solé, Antonio; Alonso Pérez de Agreda, Eduardo (Institution of Civil Engineers (http://www.ice.org.uk/), 2006)
    Article
    Accés obert
    An analysis of the conditions that led to the failure of the Aznalcóllar dam is made in the paper. Pore water pressures prevailing in the foundation clay at the time of the failure have been established on the basis of ...
  • Aznalcóllar dam failure. Part 3: Dynamics of the motion 

    Gens Solé, Antonio; Alonso Pérez de Agreda, Eduardo (Institution of Civil Engineers (http://www.ice.org.uk/), 2006)
    Article
    Accés obert
    The motion of the Aznalcóllar dam slide, after the initiation of the failure, is examined in the paper. The moving mass remained essentially rigid, and Newton’s second law provides the basic equation to determine the ...