Characterization of interface erosion sensibility on compacted cohesive soils

Didier Marot (1) , Hong Haï Nguyen (2) , Fateh Bendahmane (1) , Ouali Amiri (1) , Stéphanie Bonnet (1)

1 IEG - Interactions Eau-Geomatériaux
2 The university of Danang

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 clayey sands. 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 efficiency in order to elaborate a relative classification of erodible soils. For both clayey sands, 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]

Didier Marot, Hong Haï Nguyen, Fateh Bendahmane, Ouali Amiri, Stéphanie Bonnet. Characterization of interface erosion sensibility on compacted cohesive soils. International Conference on Scour and Erosion (ICSE), 2014, Perth, Australia. ⟨10.1201/b17703⟩. ⟨hal-04446685v2⟩