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SIIA Público
SISTEMA INTEGRAL DE INFORMACIÓN ACADÉMICA - PÚBLICO
Título del libro: 18th International Conference On Soil Mechanics And Geotechnical Engineering: Challenges And Innovations In Geotechnics, Icsmge 2013 Título del capítulo: Diametric deformations in the concrete segment lining of a tunnel excavated in soft soils. Criteria for their evaluation and mitigation actions for their control
A criterion is presented for the evaluation of diametric deformation that occurred at the initial support of a tunnel formed by pre-cast concrete segmented rings, placed in a very soft and high compressibility clay medium. This criterion is presented on a working graph, which involves the time factor with respect to the deformation rate, for several percentages of the diametric deformation, with respect to the initial diameter of the concrete segment lining. With available information it is possible to draw a line on the working graph and, depending on its particular location, it is possible to define the recommended mitigation action to be followed: only a continuous topographic monitoring if diametric deformations are minimal, additional grouting stages around the concrete segmented rings if they are more pronounced, or additional internal reinforcement structural systems if they seem dangerous for the lining's stability.
