Now showing items 21-29 of 29

    • Massive sulfate attack to cement-treated railway embankments 

      Alonso Pérez de Agreda, Eduardo; Ramon Tarragona, Anna (2013-03)
      Article
      Restricted access - publisher's policy
      Two access embankments to a railway bridge, having a maximum height of 18 m, experienced a continuous and severe heave shortly after construction. Vertical displacements reached 120 mm in a 2-year period. The embankments ...
    • Mecanismos de expansión en rocas sulfatadas 

      Ramon Tarragona, Anna (2015)
      Article
      Restricted access - author's decision
      Los mecanismos que conducen al hinchamiento en túneles en rocas sulfatadas se han descrito en la literatura; sin embargo, se propone una interpretación alternativa. La precipitación de cristales de yeso en discontinuidades ...
    • 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 ...
    • Modelling crystal growth 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (2013)
      Conference report
      Restricted access - publisher's policy
      The sustained heave of Pont de Candí Bridge is a consequence of the development of swelling strains in the sulphated claystone located below the tips of the foundation piles of the central pillan; of the bridge. The ...
    • Modelling swelling behavior of anhydritic clayey rocks 

      Ramon Tarragona, Anna; Alonso Pérez de Agreda, Eduardo (International Centre for Computational Engineering, 2013)
      Conference report
      Restricted access - publisher's policy
      The swelling behavior observed in anhydritic rocks is explained by the precipitation of gypsum crystals in open discontinuities. Gypsum crystals growing in discontinuities contribute to open them and induce deformations ...
    • Pile groups under deep expansion: a case history 

      Alonso Pérez de Agreda, Eduardo; Sauter, Simon; Ramon Tarragona, Anna (2015-08)
      Article
      Open Access
      A viaduct in a high speed railway line experienced severe heave of its central pillars as a result of deep expansion of an anhydrite rock. Bridge pillars were founded on pile groups which experienced vertical heave ...
    • Reaction of a pile group against deep swelling 

      Alonso Pérez de Agreda, Eduardo; Ramon Tarragona, Anna; Sauter, Simon (2015)
      Conference report
      Restricted access - publisher's policy
      A singular case of development of deep soil expansions in the vicinity of pile groups supporting bridge pillars motivated the analysis. A semi-analytic procedure, which uses some available fundamental solutions for cavity ...
    • Reducing water effects on the behaviour of coarse granular aggregates 

      Ramon Tarragona, Anna; Montserrat, Marina; Alonso Pérez de Agreda, Eduardo; Romero Morales, Enrique Edgar (International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2019)
      Conference report
      Restricted access - author's decision
      Rockfill embankments, rockfill dams and ballast beds experience long term compression deformations under constant loading as well as collapse deformations when relative humidity (RH) increases. Particle breakage is at the ...
    • Tunnelling in sulphate claystones 

      Alonso Pérez de Agreda, Eduardo; Berdugo de Moya, Iván Rafael; Tarragó, Dani; Ramon Tarragona, Anna (IOS Press, 2007)
      Conference report
      Restricted access - publisher's policy
      The paper reviews first the performance of some tunnels built in gypsiferous-anhydritic rocks, especially in Central Europe. Then, a description of the main gypsum-laden lithological rock units in Spain is made as an ...