Exploració per tema "Tunnel lining"
Ara es mostren els items 1-18 de 18
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An undrained upper bound solution for the face stability of tunnels reinforced by micropiles
(2013)
Text en actes de congrés
Accés restringit per política de l'editorialTunnel 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 ... -
Assessment of the bearing capacity reduction of FRC elements subjected to fire
(International Federation for Structural Concrete (fib), 2019)
Text en actes de congrés
Accés restringit per política de l'editorialThe use of Fibre Reinforced Concrete (FRC) in structural applications with higher responsibility (e.g., TBM-bored tunnels; bridges; offices and residential structural elements) is increasing. In this regard, the residual ... -
Assessment of the post-fire residual bearing capacity of FRC and hybrid RC-FRC tunnel sections considering thermal spalling
(2021-12-01)
Article
Accés obertA design-oriented numerical model for the analysis of RC, FRC, and RC-FRC tunnel sections exposed to fire with different spalling parameters is presented. The numerical model is conceived in two steps: the first is the ... -
Avances en el diseño de anillos prefabricados de concreto para el revestimiento de túneles con TBM
(Asociación Mexicana de Ingeniería de Túneles y Obras Subterráneas (AMITOS), 2019-01)
Article
Accés restringit per política de l'editorialEl uso de máquinas tuneladoras (TBMs) para la construcción de túneles se ha incrementado significativamente durante los últimos años como resultado de las ventajas que presenta para ciertas longitudes y condiciones del ... -
Caracterização de segmentos de túneis fabricados com concreto reforçado com fibras
(2015)
Text en actes de congrés
Accés restringit per política de l'editorialA construção de túneis tem grande importância em cidades superpopulosas como é o caso de São Paulo, devido às suas grandes demandas de infraestrutura. Neste sentido, o sistema de escavação mecanizada (TBM) é uma alternativa ... -
Comportamiento resistente de revestimientos de túnel de anillos de dovelas prefabricadas de hormigón
(2013)
Article
Accés obertEste artículo presenta los resultados de una investigación llevada a cabo en el ámbito de la respuesta resistente de los revestimientos de túneles a base de anillos de dovelas prefabricadas de hormigón. La investigación ... -
Damage investigation of a tunnel subjected to an unplanned surface load through non-linear analysis
(2017-08)
Article
Accés obertA description of the deformations and damage that occurred in a segmental tunnel lining as a consequence of an unplanned surface load is presented, as well as the numerical analyses performed for its safety assessment. The ... -
Design-oriented assessment of the residual post-fire bearing capacity of precast fiber reinforced concrete tunnel linings
(2022-01)
Article
Accés obertThis study presents a meso-scale experimental program and employs a numerical approach to determine the bearing capacity of steel fiber reinforced concretes (SFRC) tunnel linings after fire exposure. First, the effect of ... -
Diseño geométrico de revestimientos prefabricados de hormigón armado para túneles ejecutados con TBM
(2022)
Comunicació de congrés
Accés obertLa ejecución de túneles con T.B.M. y revestimientos de dovelas prefabricadas de hormigón armado se ha convertido en una solución frecuente en áreas urbanas, válida para una amplia gama de entornos geotécnicos. En esta ... -
Diseño óptimo de dovelas de hormigón reforzado con fibras para el revestimiento de túneles
(2015)
Article
Accés obertEl uso del hormigón reforzado con fibras (HRF) para la fabricación de dovelas de túneles es una práctica en aumento. Sin embargo, aún existe cierta inercia al cambio respecto a la solución tradicional de hormigón armado ... -
Dovelas innovadoras de alta durabilidad reforzadas sólo con fibras no metálicas
(2019-09)
Article
Accés obertLos anillos de dovelas prefabricadas de HRF son un revestimiento habitual en túneles excavados con tuneladora. DRAGADOS-gGRAVITY Engineering-UPC han querido ir un paso más allá estudiando el comportamiento de dovelas ... -
Effect of soil saturation changes on pressure on tunnel linings
(IOS Press, 2009)
Comunicació de congrés
Accés restringit per política de l'editorialIt is well known that changes in soil degree of saturation have an important influence on mechanical soil properties. Decreasing suction in soil leads to an increase of specific weight and to a decrease of stiffness and ... -
Longitudinal time-dependent response of segmental tunnel linings
(2012-03)
Article
Accés obertThe longitudinal forces introduced by tunnel boring machines (TBMs) to the segmental tunnel linings influence their structural response. The analyses of the linings construction process and the ground-structure interaction ... -
Propuesta de método de optimización de refuerzo de segmentos de túneles fabricados con hormigón reforzado con fibras
(2015)
Text en actes de congrés
Accés restringit per política de l'editorialThe construction of underground lines has a big importance in overpopulated cities such as São Paulo. In that sense, the tunnel boring machine (TBM) method for tunnel construction is a method that allows a high speed of ... -
Safety format for the flexural design of tunnel fibre reinforced concrete precast segmental linings
(Elsevier, 2020-09)
Article
Accés obertFibre reinforced concrete (FRC) is increasingly used in tunnel segmental linings constructed with tunnel boring machines. Several codes include the FRC as a structural material and specific guidelines cover the design of ... -
Strain-monitoring of a concrete tunnel lining with distributed optical fiber sensors
(International Society for Structural Health Monitoring of Intelligent Infrastructure (ISHMII), 2021)
Text en actes de congrés
Accés obertDespite their advantageous performance and reliability, distributed optical fiber sensors (DOFS) still constitute a recent technology and their reliability and accuracy when applied to real world structures is still under ... -
Theoretical and numerical analysis of the three-dimensional response of segmental tunnel linings subjected to localized loads
(2015-06)
Article
Accés obertSegmental tunnel linings present a significant 3D response when they are subjected to localized loads or to other scenarios that produce different deformations of adjacent rings. The present paper analyzes the interaction ... -
Three dimensional structural response of segmental tunnel linings
(2012-11)
Article
Accés obertThe particular configuration of segmental tunnel linings produces that its structural response in front of usual design loads could present a significant three dimensionality due to the structural interaction between ...