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Títol:	Triaxial tests on frozen ground: formulation and modelling
Autor/a:	Casini, F.; Gens Solé, Antonio; Olivella Pastallé, Sebastià; Viggiani, Giulia M.B.
Altres autors:	Universitat Politècnica de Catalunya. Departament d'Enginyeria del Terreny, Cartogràfica i Geofísica; Universitat Politècnica de Catalunya. MSR - Mecànica del Sòls i de les Roques
Abstract:	Artificial Ground Freezing (AGF) is a controllable process that can be used by engineers to stabilise temporarily the ground, provide structural support and/or exclude groundwater from an excavation until construction of the final lining provides permanent stability and water tightness. In this work, the process of ground freezing is studied using a constitutive model that encompasses frozen and unfrozen behaviour within a unified effective-stress- based framework and employs a combination of ice pressure, liquid water pressure and total stress as state variables. The parameters of the constitutive model are calibrated against experimental data obtained from samples retrieved during construction of Napoli underground, in which AGF was extensively used to excavate in granular soils and weak fractured rock below the ground water table.
Matèries:	-Àrees temàtiques de la UPC::Enginyeria civil::Geotècnia::Mecànica de sòls -Frozen ground--Testing -Computational plasticity -Coupled analysis -Frozen soils -Triaxial tests -Sòls -- Assaigs -Enginyeria civil -- Regions fredes
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Tipus de document:	Article - Versió publicada Objecte de conferència
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