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    • High Capacity Tensiometers: performance and behaviours 

      Mendes, Joao; Jamali, Armin; Najdi, Abdallah; Encalada López, David Alejandro; Bruno, Agostino; Prat Catalán, Pere; Buzzi, Olivier; Gallipoli, Domenico; Ledesma Villalba, Alberto; Toll, David (EDP Sciences, 2023-04)
      Article
      Accés obert
      High capacity tensiometers (HCT) allow the direct measurement of soil matric suction, and their major limitation is the occurrence of cavitation. In this paper HCT designs using different ceramic filters with varied air ...

    • Hybrid minimization algorithm applied to tunnel back analysis 

      Santos Rodríguez, Cristian de; Ledesma Villalba, Alberto; Gens Solé, Antonio (CRC Press Taylor & Francis Group, 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      The paper describes a procedure to perform backanalysis in an automatic manner in the context of a tunnel excavation. The measured displacements are compared with the calculated ones obtained from a Finite Element Analysis, ...

    • Hydrogeological impact assessment by tunnelling at sites of high sensitivity 

      Pujades Garnes, Estanislao; Vázquez Suñé, Enric; Culi, Laura; Carrera Ramírez, Jesús; Ledesma Villalba, Alberto; Jurado Elices, Anna (2015-07)
      Article
      Accés obert
      A tunnel for the High Speed Train (HST) was constructed in Barcelona with an Earth Pressure Balance (EPB) Tunnel Boring Machine (TBM). The tunnel crosses Barcelona and passes under some famous landmarks such as the Sagrada ...

    • Identificación de parámetros en geotecnia aplicación a la excavación de túneles 

      Ledesma Villalba, Alberto (Universitat Politècnica de Catalunya, 1987-04-06)
      Tesi
      Accés obert
      En esta tesis se desarrolla una metodología general para la identificación de parámetros en problemas geotécnicos. <br/><br/>Dado un problema especifico se supone fijado un modelo (determinista) y se consideran conocidos ...

    • Identificación no lineal de movimientos sísmicos en el lecho rocoso ingenieril a partir de registros tomados en la superficie 

      Rodríguez Sánchez, Julio; López Almansa, Francisco; Ledesma Villalba, Alberto (Asociación Chilena de Sismología e Ingeniería Antisísmica, 2019)
      Text en actes de congrés
      Accés obert
      En ingeniería sísmica, los registros disponibles suelen ser superficiales y, en consecuencia, los movimientos en las capas inferiores deben ser estimados conociendo el perfil estratigráfico del terreno; estos movimientos ...

    • Impactos hidrogeologicos causados por la construccion del AVE en el entorno de la Sagrada Familia (Barcelona) 

      Pujades Garnes, Estanislao; Vázquez Suñé, Enric; Culi, Laura; Carrera Ramírez, Jesús; Ledesma Villalba, Alberto; Jurado Elices, Anna (Universidad Politécnica de Valencia, 2014)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      El tunel del AVE que atraviesa Barcelona fue construido con una tuneladora tipo EPB. El trazado del túnel pasa bajo la Sagrada Familia (declarada patrimonio de la humanidad por la UNESCO), y debido a los riesgos que entrañaba ...

    • Influence of compaction on the soil shrinkage and swelling curves 

      Encalada López, David Alejandro; Najdi, Abdallah; Mendes, Joao; Prat Catalán, Pere; Ledesma Villalba, Alberto (EDP Sciences, 2023-04)
      Article
      Accés obert
      The behaviour of soils undergoing deformation due to changes in water content can be described using Soil Shrinkage Curves (SSCs). The SSCs are normally influenced by several factors as the soil’s fabric, different compaction ...

    • Influence of cracking in the desiccation process of clay soils 

      Levatti, Hector Ulises; Prat Catalán, Pere; Ledesma Villalba, Alberto (2009)
      Text en actes de congrés
      Accés obert
      It is well known that clayey soils undergoing desiccation tend to shrink and eventually crack. Analysis of the behaviour and influence of cracks in these types of soils is very important in several engineering fields such ...

    • Instrumentación y caracterización de las propiedades dinámicas de las arenas de Tumaco (Colombia) 

      García Núñez, Jesús Rafael; Ledesma Villalba, Alberto (AIBIS, 2005)
      Text en actes de congrés
      Accés obert
      La zona de Tumaco está situada en la costa pacífica al sur de Colombia, cerca de la frontera con Ecuador. La población se asienta sobre grandes depósitos de arenas y limos arenosos saturados procedentes del delta del río ...

    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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)
      Text en actes de congrés
      Accés obert
      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 ...

    • Low lateral stiffness underground structures for improved seismic performance: application to the Kobe Daikai station 

      Bu, Xiangbo; Ledesma Villalba, Alberto; López Almansa, Francisco (Elsevier, 2023-09)
      Article
      Accés obert
      Underground cut-and-cover structures are commonly designed as rigid box sections; however, in practical applications, connections between walls and slabs are frequently rather hinged (because of ease of construction). The ...

    • Método de inversión generalizada: aplicación en sismología y posibilidades en ingeniería civil 

      Canas Torres, José Antonio; Ledesma Villalba, Alberto (1985)
      Article
      Accés obert
      El método de inversión generalizada ha sido aplicado extensamente en Geofísica, y en particular en Sismología, con sumo éxito. En este trabajo se describe en forma sucinta, pero suficientemente clara, dicho método, ...

    • Micro-measurement and monitoring system for ageing underground infrastructure (UndergroundM3) 

      Soga, K.; Ledesma Villalba, Alberto; Roncaglia, A.; Vanícek, I. (CRC Press/Balkema, 2012)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      Advances in the development of computer vision, miniature micro-electro-mechanical systems (MEMS) and wireless sensor network (WSN) offer intriguing possibilities that can radically alter the paradigms underlying existing ...

    • 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)
      Text en actes de congrés
      Accés restringit per política de l'editorial
      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 ...

    • Negative skin friction on piles: a simplified analysis and prediction procedure 

      Alonso Pérez de Agreda, Eduardo; Josa Garcia-Tornel, Alejandro; Ledesma Villalba, Alberto (Institution of Civil Engineers (http://www.ice.org.uk/), 1984)
      Article
      Accés obert
      In order to describe the interaction between a single pile and a consolidating soil a stress transfer approach at the interface is proposed. The non-linear, plastic character of the shear stress acting on the pile shaft ...

    • Novel seismic design solution for underground structures. Case study of a 2-story 3-bay subway station 

      Bu, Xiangbo; Ledesma Villalba, Alberto; López Almansa, Francisco (Elsevier, 2022-02)
      Article
      Accés obert
      This paper proposes an innovative seismic design approach for shallow rectangular cut-and-cover underground subway or railway stations. The traditional approach is to design rigid frame-like structures by connecting rigidly ...

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

      Levatti, Hector Ulises; Prat Catalán, Pere; Ledesma Villalba, Alberto (CIMNE, 2017)
      Text en actes de congrés
      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 analysis of desiccation, shrinkage and cracking in low plasticity clayey soils 

      Levatti, Hector Ulises; Prat Catalán, Pere; Ledesma Villalba, Alberto (2017)
      Comunicació de congrés
      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 ...