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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: Design of tunnel lining in consolidating soft soils
In this paper, a detailed description of the methodology employed for analysis and design of the final lining of a tunnel that will be part of Mexico City drainage system is presented. The tunnel crosses soft clayey soils of the lake zone of Mexico Valley. These clays are submitted to an on-going subsidence process associated to intense pumping of water from the aquifer in the urban area. The obtained results allow a better understanding of the soil-Tunnel interaction as the medium is submitted to the effects of a double process of consolidation: firstly due to changes in effective stresses generated by the tunnel excavation and, secondly, due to the long term piezometric drawdown in the soil. It is shown that Finite Element Method (MEF) is a powerful tool for the analysis and design of tunnels in these difficult conditions. FEM allows considering different constitutive models, and representing soil consolidation due to tunnel excavation, piezometric drawdown and interaction between the tunnel lining and the surrounding soil.
