Now showing items 1-20 of 29

    • 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 ...
    • 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 ...
    • Crystal growth and soil expansion: the role of interfacial pressure and pore structure 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (CRC Press, 2014)
      Conference report
      Restricted access - publisher's policy
      The paper summarizes first a set of field observations in connection with the severe heave experienced by Lilla tunnel excavated in a Tertiary anhydritic claystone. Heave and swelling pressures against the tunnel rigid ...
    • Crystal growth under bridge foundation 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (2012)
      Conference report
      Open Access
      A high-speed railway viaduct experienced a sustained heave at high rates after its construction. The pillars of the bridge are founded on an Eocene hard anhydritic-gypsiferous claystone by means of massive foundations. ...
    • Efecto de la expansión profunda sobre cimentaciones por pilotes 

      Sauter, Simon; Alonso Pérez de Agreda, Eduardo; Ramon Tarragona, Anna (Sociedad Española de Mecánica del Suelo e Ingeniería Geotécnica, 2012)
      Conference report
      Restricted access - publisher's policy
    • El túnel de Lilla 

      Alonso Pérez de Agreda, Eduardo; Ramon Tarragona, Anna (2011)
      Conference report
      Open Access
      Las arcillas sulfatadas pueden experimentar fenómenos expansivos graves como consecuencia de excavaciones. La intensidad del comportamiento expansivo observado en estos materiales es mayor que en otras rocas y suelos ...
    • Expansion mechanisms in sulphated rocks and soils 

      Ramon Tarragona, Anna (Universitat Politècnica de Catalunya, 2014-10-27)
      Doctoral thesis
      Open Access
      Geological formations containing sulphates are commonly associated with the development of severe expansions when they are involved in tunnel excavation. The intensity of the observed expansive behaviour in these materials ...
    • Fenómenos de expansión en estribos 

      Alonso Pérez de Agreda, Eduardo; Ramon Tarragona, Anna (2010)
      Conference report
      Restricted access - publisher's policy
    • Gypsum crystal growth in tunnels 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (CRC Press. Taylor & Francies Group, 2011)
      Conference lecture
      Restricted access - publisher's policy
      Precipitation of gypsum crystals explains the severe swelling occurred in some tunnels crossing sulphate formations. The presence of groundwater and discontinuities, and the proportions of anhydrite and gypsum within the ...
    • Heave of a building induced by swelling of an anhydritic Triassic claystone 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (2018-09)
      Article
      Open Access
      This paper describes the conditions leading to a sustained, low-rate, heave phenomenon affecting a building founded on hard Keuper anhydritic rock. The building was located in an abandoned gypsum quarry. Monitoring data ...
    • Heave of a building on Keuper anhydritic formation 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2017)
      Conference report
      Restricted access - publisher's policy
      The development of fissures in a building placed at the site of an ancient quarry excavated in a Keuper formation motivated a detailed in-situ investigation of the foundation material. Severe fissures and cracks were present ...
    • Heave of a railway bridge induced by gypsum crystal growth: field observations 

      Alonso Pérez de Agreda, Eduardo; Ramon Tarragona, Anna (2013-07)
      Article
      Restricted access - publisher's policy
      The central pillars of a bridge belonging to a recently built high-speed railway line experienced an unexpected and continuous heave after the end of construction. Pillars were founded on 3 × 3 pile groups capped by a rigid ...
    • Heave of a railway bridge: modelling gypsum crystal growth 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (2013-01)
      Article
      Restricted access - publisher's policy
      The heave of the central pillars of a railway bridge, founded on large-diameter bored piles, is a consequence of gypsum crystal growth in an anhydritic claystone stratum underlying the tip of the piles. The heave mechanism ...
    • Heave of a sports centre on anhydritic claystone formation 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (CRC Press, 2019)
      Conference report
      Restricted access - publisher's policy
      The development of fissures in a building placed at the site of an ancient quarry excavated in a claystone Keuper formation motivated a detailed in-situ investigation of the foundation material. Severe fissures and cracks ...
    • Hinchamiento en túneles por crecimiento de cristales y su modelación 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (Universitat Politécnica de Catalunya. Escola Tècnica Superior d'Enginyers de Camins Canals i Ports de Barcelona, 2011-11-15)
      Conference lecture
      Open Access
      La intensidad del comportamiento expansivo observado en excavaciones de túneles en arcillas sulfatadas es mayor que en otras rocas y suelos expansivos libres de sulfatos. En la mayoría de casos la funcionalidad y la ...
    • 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 ...
    • Interacciones hidrodinámicas y químicas en el comportamiento y patología de terraplenes 

      Alonso Pérez de Agreda, Eduardo; Ramon Tarragona, Anna (2009)
      Conference report
      Restricted access - publisher's policy
    • Interactions of infrastructures with anhydritic rocks and its hydro-chemo-mechanical modelling 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (WBI GmbH, 2019)
      Conference report
      Restricted access - publisher's policy
    • Levantamiento de un edificio cimentado sobre roca anhidrítica del Keuper 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (Sociedad Española de Mecánica del Suelo e Ingeniería Geotécnica, 2016)
      Conference lecture
      Restricted access - publisher's policy
      La aparición y aumento de agrietamientos en un edificio situado en el solar de una antigua cantera excavada en el Keuper motivó un reconocimiento detallado del terreno de cimentación. Las plantas sótano, semisótano y baja ...