Investigating concentrated leak erosion behaviour of cohesive soils by performing hole erosion tests / Nadia Benahmed in European journal of environmental and civil engineering, Vol. 16 N° 1 (Janvier 2012)  

Investigating concentrated leak erosion behaviour of cohesive soils by performing hole erosion tests [texte imprimé] / Nadia Benahmed, Auteur ; Stéphane Bonelli, Auteur . - 2012 . - pp. 43-58.
Génie Civil
Langues : Anglais (eng)
in European journal of environmental and civil engineering > Vol. 16 N° 1 (Janvier 2012) . - pp. 43-58

Mots-clés :	Internal erosion Piping Experimental study Cohesive soils Critical shear stress Rate of Hydraulic works
Résumé :	Internal erosion by piping is one of the common causes of failure of embankment dams and dykes. This phenomenon occurs when preferential flow paths develop in the earthfill or foundation; through these water flows, carrying away particles of soil and leading to the formation and the evolution of a continuous ‘pipe’ between the upstream and the downstream side. A series of hole erosion tests were conducted on cohesive soils in order to quantify critical shear stress and the coefficient of erosion: white kaolinite, proclay kaolinite and a hostun sand/proclay kaolinite mixture. The effects of compaction energy, moisture content, degree of saturation and the percentage of fines were investigated. The experimental results show that these parameters play a key role in the erosion characteristics.
DEWEY :	624
ISSN :	1964-8189
En ligne :	http://www.tandfonline.com/doi/abs/10.1080/19648189.2012.667667