Internal erosion of clayey soils protected by granular filters / Fernando Delgado-Ramos in La Houille blanche, N° 4-5 (Octobre 2012)  

Public ISBD [article]  inLa Houille blanche > N° 4-5 (Octobre 2012) . - pp. 42-47 Titre : Internal erosion of clayey soils protected by granular filters Titre original : Erosion interne des sols argileux protégés par des filtres granulaires Type de document : texte imprimé Auteurs : Fernando Delgado-Ramos, Auteur ; José Manuel Poyatos, Auteur ; Francisco Osorio, Auteur Année de publication : 2012 Article en page(s) : pp. 42-47 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Internal erosion Granular filter Clay Embankment dams Résumé : The process of internal erosion in an embankment dam with granular filters can be divided in five stages : (i) formation of the crack through the core, (ii) erosion of material from the crack walls due to the shear stress applied by flowing water, (iii) transport of eroded particles to the filter, (iv) retention or percolation of these particles within the filter, (v) continuation of erosion leading to piping failure, or sealing of the crack. The process is quite well known in case of non-cohesive base soils, but if the base is a clayey soil, the process is much more complex. Based on a large number of No Erosion Filter tests performed at the University of Granada, (Spain), this paper analyses the influence that have several base soil’s variables in the internal erodability of clayey soils protected by granular filters, such as plasticity, mineralogy, water content, additives and hydraulic gradient. ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...] [article] Internal erosion of clayey soils protected by granular filters = Erosion interne des sols argileux protégés par des filtres granulaires [texte imprimé] / Fernando Delgado-Ramos, Auteur ; José Manuel Poyatos, Auteur ; Francisco Osorio, Auteur . - 2012 . - pp. 42-47. Hydraulique Langues : Anglais (eng) in La Houille blanche > N° 4-5 (Octobre 2012) . - pp. 42-47 Mots-clés : Internal erosion Granular filter Clay Embankment dams Résumé : The process of internal erosion in an embankment dam with granular filters can be divided in five stages : (i) formation of the crack through the core, (ii) erosion of material from the crack walls due to the shear stress applied by flowing water, (iii) transport of eroded particles to the filter, (iv) retention or percolation of these particles within the filter, (v) continuation of erosion leading to piping failure, or sealing of the crack. The process is quite well known in case of non-cohesive base soils, but if the base is a clayey soil, the process is much more complex. Based on a large number of No Erosion Filter tests performed at the University of Granada, (Spain), this paper analyses the influence that have several base soil’s variables in the internal erodability of clayey soils protected by granular filters, such as plasticity, mineralogy, water content, additives and hydraulic gradient. ISSN : 0018-6368 En ligne : http://www.shf-lhb.org/index.php?option=com_article&access=standard&Itemid=129&u [...]

Exemplaires

Code-barres	Cote	Support	Localisation	Section	Disponibilité
aucun exemplaire