Erosion of cohesive soil layers above underground conduits
1 IRSTEA, UR RECOVER, 3275 route de Cézanne, 13182 Aix-en-Provence, France.
2 BRGM, DRP (Direction Risques et Prévention), 3 Av. Claude Guillemin, BP 36009, 45060 Orléans Cedex 2
3 BRGM, D3E (Direction Eau, Environnement, Ecotechnologies), 3 Av. Claude Guillemin, BP 36009, 45060 Orléans Cedex 2
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Published online: 30 June 2017
Using a recently developed 2D numerical modelling that combines Discrete Element (DEM) and Lattice Boltzmann methods (LBM), we simulate the destabilisation by an hydraulic gradient of a cohesive granular soil clogging the top of an underground conduit. We aim to perform a multi-scale study that relates the grain scale behavior to the macroscopic erosion process. In particular, we study the influence of the flow conditions and the inter-particle contact forces intensity on the erosion kinetic.
© The Authors, published by EDP Sciences, 2017
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