Now showing items 1-20 of 195

    • 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)
      Conference report
      Restricted access - publisher's policy
      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
      Open Access
      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
      Open Access
      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
      Restricted access - publisher's policy
      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 model for rockill compressibility 

      Oldecop, Luciano A.; Alonso Pérez de Agreda, Eduardo (Institution of Civil Engineers (http://www.ice.org.uk/), 2001)
      Article
      Open Access
      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
      Restricted access - publisher's policy
      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
      Open Access
      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
      Open Access
      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
      Open Access
      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
      Restricted access - publisher's policy
      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)
      Conference report
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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)
      Conference report
      Restricted access - publisher's policy
      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 ...
    • Aceleración de deslizamientos por efectos térmicos: modelación mediante el método del punto material 

      Alvarado Bueno, Mauricio; Pinyol Puigmartí, Núria Mercè; Alonso Pérez de Agreda, Eduardo (2017)
      Conference report
      Open Access
      La ocurrencia de deslizamientos rápidos se ha ligado a la pérdida de resistencia efectiva a lo largo de la superficie de rotura debido a excesos de presión de agua inducidos por el calor generado durante el propio movimiento. ...
    • An undrained upper bound solution for the face stability of tunnels reinforced by micropiles 

      Pinyol Puigmartí, Núria Mercè; Alonso Pérez de Agreda, Eduardo (2013)
      Conference report
      Restricted access - publisher's policy
      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
      Open Access
      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)
      Conference lecture
      Restricted access - publisher's policy
      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 massive sulphate attack to cement-treated compacted soils 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (E3S Web of Conferences, 2020)
      Conference report
      Open Access
      The paper describes the heave experienced by two embankments providing access to a bridge located in a high-speed railway line. The compacted soil, a mixture of a low plasticity clay, sand and gravel, had a significant ...
    • Analysis of micro-properties for triaxial behaviour on coarse aggregates using DEM 

      Tapias, Mauricio A.; Alonso Pérez de Agreda, Eduardo; Gili Ripoll, José Antonio (CIMNE, 2011)
      Conference report
      Open Access
      This paper presents an analysis of the mechanical behaviour of coarse granular aggregates using the discrete element method. A background reference for the conducted study is the set of results of a few large scale triaxial ...
    • 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)
      Conference report
      Restricted access - publisher's policy
      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)
      Conference report
      Open Access
      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 ...