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Erschienen in:
2017 | OriginalPaper | Buchkapitel
Micromechanical Modelling of Suffusion: Towards the Stability Analysis of Hydraulic Structures
verfasst von : Antoine Wautier, Stéphane Bonelli, François Nicot
Erschienen in: Bifurcation and Degradation of Geomaterials with Engineering Applications
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Abstract
Suffusion is the most controversial of the process of internal erosion and piping as there is a lack of microscopic understanding of the degradation processes at stake in saturated soils subjected to an internal flow. Thanks to the use of a DEM-PFV (Discrete Element Method—Pore-scale Finite Volume) approach, this study addresses the fully coupled problem of the suffusion of a non cohesive granular material. Eligible particles to grain detachment and grain transport are characterized from a micromechanical point of view thanks to the use of an enhanced force chain definition and the definition of a pore network. A Representative Elementary Volume with respect to the grain detachment and grain transport is then quantified.