Interface erosion sensibility of cohesive fine soils
Résumé
Erosion is one of the main causes of instabilities within hydraulic earth structures as dams, dikes or levees. This paper deals with the interface erosion phenomenon between soil and water, and the Jet Erosion Test is used in order to evaluate the erodibility of two types of clayey sand. Twenty three specimens are compacted using a normal Proctor technique and results are analyzed with energy based method and also with Hanson and Simon’s method. Energy based method is less conservative and appears more efficient in order to elaborate a relative classification of erodible soils. For both types of clayey sand, the erosion sensibility, defined by the erosion resistance index is linearly related with saturation ratio. The parametric study also highlights the influence on the interface erosion sensibility of the micro fabric of tested soils.
Domaines
Mécanique [physics.med-ph]
Origine : Fichiers produits par l'(les) auteur(s)