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Ara es mostren els items 14-27 de 27

    • Laboratory experiments in soil mechanics by means of digital twins and low-cost equipment 

      Ledesma Villalba, Alberto; Prat Catalán, Pere; Lloret Morancho, Antonio; Chacón Flores, Rolando Antonio; Sondon Sansó, Mercedes (International Society for Soil Mechanics and Geotechnical Engineering (ISSMGE), 2020)
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      The Soil Mechanics Laboratory has been traditionally an important issue in most courses on Soil Mechanics and Geotechnical Engineering. Nowadays, the available technology allows to build low cost systems that brings the ...

    • Large test to study the role of soil-air interaction in soil cracking 

      Cordero Arias, Josbel Andreina; Prat Catalán, Pere; Ledesma Villalba, Alberto; Cuadrado Cabello, Agustín (The Hong Kong University of Science and Technology (HKUST), 2018)
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      Soil surfaces in contact with the atmosphere are interfaces where different processes play an important role in triggering the formation of cracks due to desiccation. Empirical evidence shows that variables such as solar ...

    • Methods for FEM stress initialization based on stress functions, and application to a reservoir cross-section 

      Aliguer Piferrer, Ignasi; Rafels Ybern, Carles; Jaqués Adell, Irene; Carol, Ignacio; Prat Catalán, Pere; Lakashmikhanta, Ramasesha; Segura Segarra, José María (OnePetro, 2013)
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      An accurate description of the in-situ stress field in a rock mass is crucial in different areas of geo-engineering such as: underground excavations, hydrocarbon extraction, CO2 storage, hydraulic fracture etc. In this ...

    • Mitigación de grietas por desecación en suelos finos mediante el uso de fibras sintéticas 

      Hernández Valerio, Carolina; Botero Jaramillo, Eduardo; Encalada López, David Alejandro; Najdi, Abdallah; Prat Catalán, Pere; Ledesma Villalba, Alberto (Sociedad Mexicana de Ingeniería Geotécnica (SMIG), 2022)
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      Los suelos arcillosos tienen la propiedad de hincharse en presencia de agua y contraerse en su ausencia, produciendo así grietas por desecación que alteran significativamente su desempeño mecánico e hidráulico. En este ...

    • Numerical analysis of desiccation, shrinkage and cracking in low plasticity clayey soils 

      Levatti, Hector Ulises; Prat Catalán, Pere; Ledesma Villalba, Alberto (CIMNE, 2017)
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      This paper presents a numerical study of the desiccation processes of low-plasticity clayey soils that usually result in shrinkage and often in cracking. For the theoretical development of the numerical model, concepts of ...

    • Numerical analysis of desiccation, shrinkage and cracking in low plasticity clayey soils 

      Levatti, Hector Ulises; Prat Catalán, Pere; Ledesma Villalba, Alberto (2017)
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      Accés obert
      This paper presents a numerical study of the desiccation processes of low-plasticity clayey soils that usually result in shrinkage and often in cracking. For the theoretical development of the numerical model, concepts of ...

    • Numerical and experimental study of initiation and propagation of desiccation cracks in clayey soils 

      Levatti, Hector Ulises; Prat Catalán, Pere; Ledesma Villalba, Alberto (Elsevier, 2019-01)
      Article
      Accés obert
      This paper presents the fundamentals and the mathematical formulation to study desiccation cracking in soils based on Unsaturated Soil Mechanics as well as a numerical analysis of a previous desiccation test program. The ...

    • Numerical investigation into the failure of a micropile retaining wall 

      Prat Catalán, Pere (2017-01)
      Article
      Accés obert
      The paper presents a numerical investigation on the failure of a micropile wall that collapsed while excavating the adjacent ground. The main objectives are: to estimate the strength parameters of the ground; to perform a ...

    • Numerical stress initialization in geomechanics via the FEM and a two-step procedure 

      Aliguer Piferrer, Ignasi; Carol, Ignacio; Prat Catalán, Pere; Rafels Ybern, Carles; Lakashmikhanta, Ramasesha; Segura Serra, Josep Maria (CIMNE, 2015)
      Comunicació de congrés
      Accés obert
      The knowledge of the in-situ stress field in rock masses is crucial in different areas of geo-engineering, such as mining or civil underground excavations, hydrocarbon extraction, CO2 storage, hydraulic fracture operations, ...

    • Patterns of cracking in soils due to drying and wetting cycles 

      Ledesma Villalba, Alberto; Cordero Arias, Josbel Andreina; Cuadrado Cabello, Agustín; Prat Catalán, Pere (CRC Press, 2014)
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      There is a well reported evidence of cracking in clayey or silty soils when drying. Shrinkage in the soil mass and also boundary conditions generate a nonhomogeneous stress state locally producing tensile stresses and ...

    • Soil surface boundary condition in desiccating soils 

      Cuadrado Cabello, Agustín; Encalada López, David Alejandro; Ledesma Villalba, Alberto; Prat Catalán, Pere (The Icelandic Geotechnical Society (IGS), 2019)
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      Soils undergoing desiccation exhibit shrinkage and eventually cracking. That may become an environmental problem in practical applications. From a Geotechnical perspective, it is possible to solve the corresponding ...

    • THM analysis of a soil drying test in an environmental chamber: the role of boundary conditions 

      Cuadrado Cabello, Agustín; Najdi, Abdallah; Ledesma Villalba, Alberto; Olivella Pastallé, Sebastià; Prat Catalán, Pere (Elsevier, 2022-01)
      Article
      Accés obert
      This paper presents the numerical analysis of an experimental soil drying test carried on an initially slurry soil specimen with controlled temperature and relative humidity in a laboratory environmental chamber. The imposed ...

    • Towards the development on new high capacity tensiometers capable of measuring soil matric suction beyond 3 MPa 

      Mendes, Joao; Najdi, Abdallah; Encalada López, David Alejandro; Prat Catalán, Pere; Ledesma Villalba, Alberto (2022-09)
      Article
      Accés obert
      High capacity tensiometers (HCT) are the only type of sensors in existence that can measure soil matric suction directly and are regarded to be the most accurate and reliable technique for the study of suction evolution ...

    • Transient large heat advection in fractured rock: a zero-thickness interface formulation 

      Pérez Carreras, Adrià; Carol, Ignacio; Prat Catalán, Pere (International Centre for Numerical Methods in Engineering (CIMNE), 2021)
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      In a fractured rock mass, the existence of discontinuities may generate preferential paths where the hydraulic flow velocities are frequently much higher than in the porous medium and heat advection tends to dominate over ...