Numerical modelling of suffusion by discrete element method: A new internal stability criterion based on mechanical behaviour of eroded soil
| Autor: | Tariq Ouahbi, Jean-Marie Fleureau, Nadjibou Abdoulaye Hama, Anne Pantet, Hanène Souli, Said Taibi |
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| Přispěvatelé: | Laboratoire Ondes et Milieux Complexes (LOMC), Centre National de la Recherche Scientifique (CNRS)-Université Le Havre Normandie (ULH), Normandie Université (NU)-Normandie Université (NU), Laboratoire de Mécanique, Physique et Géosciences (LMPG), Université Le Havre Normandie (ULH), Ecole Nationale d'Ingénieurs de Saint Etienne, Laboratoire de mécanique des sols, structures et matériaux (MSSMat), CentraleSupélec-Centre National de la Recherche Scientifique (CNRS), Laboratoire de Tribologie et Dynamique des Systèmes (LTDS), École Centrale de Lyon (ECL), Université de Lyon-Université de Lyon-École Nationale des Travaux Publics de l'État (ENTPE)-Ecole Nationale d'Ingénieurs de Saint Etienne-Centre National de la Recherche Scientifique (CNRS) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
021110 strategic defence & security studies Stability criterion [SDE.IE]Environmental Sciences/Environmental Engineering QC1-999 0211 other engineering and technologies 02 engineering and technology Granular material Glass ball Instability Discrete element method [SPI]Engineering Sciences [physics] Soil water [SDE]Environmental Sciences Internal erosion Geotechnical engineering Particle flow Statistical physics ComputingMilieux_MISCELLANEOUS 021101 geological & geomatics engineering |
| Zdroj: | 8th International Conference on Micromechanics on Granular Media, Powders and Grains 2017 8th International Conference on Micromechanics on Granular Media, Powders and Grains 2017, Jul 2017, Montpellier, France EPJ Web of Conferences EPJ Web of Conferences, EDP Sciences, 2017, 140, pp.10011. ⟨10.1051/epjconf/201714010011⟩ EPJ Web of Conferences, Vol 140, p 10011 (2017) HAL |
| ISSN: | 2100-014X |
| DOI: | 10.1051/epjconf/201714010011⟩ |
| Popis: | International audience; Non-cohesive soils subjected to a flow may have a behavior in which fine particles migrate through the interstices of the solid skeleton formed by the large particles. This phenomenon is termed internal instability, internal erosion or suffusion, and can occur both in natural soil deposits and also in geotechnical structures such as dams, dikes or barrages. Internal instability of a granular material is its inability to prevent the loss of its fine particles under flow effect. It is geometrically possible if the fine particles can migrate through the pores of the coarse soil matrix and results in a change in its mechanical properties. In this work, we uses the three-dimensional Particle Flow Code (PFC3D/DEM) to study the stability/instability of granular materials and their mechanical behavior. Kenney and Lau criterion sets a safe boundary for engineering design. However, it tends to identify stable soils as unstable ones. The effects of instability and erosion, simulated by clipping fine particles from the grading distribution, on the mechanical behaviour of glass ball samples were analysed. The mechanical properties of eroded samples, in which erosion is simulated and gives a new approach for internal stability. A proposal for a new internal stability criterion is established, it is deduced from the analysis of relations between the mechanical behaviour and internal stability, including material contractance. |
| Databáze: | OpenAIRE |
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