Trabajo presentado en el VII Simposio Peruano de Geoingeniería

Por: A. Viana da Fonseca y F. Molina Gómez, Construct-Geo, Universidade do Porto (FEUP), Porto, Portugal. 

Abstract

This paper presents advanced laboratory procedures for characterizing fundamental hydromechanical parameters in the modeling of liquefiable soils and mine tailings. These materials are highly unstable due to their high brittleness, which leads to a high susceptibility to liquefaction by flow. 

The document focuses on the characterization of the physical, hydraulic and mechanical properties, focusing on the precise definition of the parameters that establish the Critical State Line (CSL). These parameters are essential for applying constitutive models based on Critical State Soil Mechanics (CSSM) in the three-dimensional space of stress invariants. In this way, improvements in triaxial equipment are addressed to define the CSL parameters. In addition, the effects of stress paths on the undrained behavior of unstable materials are shown. 

Finally, a methodology based on cyclic simple shear tests is presented to estimate the resistance to liquefaction induced by seismic stresses under various conditions of cyclic stress, relative density and consolidation. This study contributes to the understanding and prevention of instabilities in mine tailings facilities, promoting safer design and better management of these critical materials.