Energy-based method for providing soil surface erodibility rankings / Didier Marot in Journal of geotechnical and geoenvironmental engineering, Vol. 137 N° 12 (Décembre 2011)  

Public ISBD [article]  inJournal of geotechnical and geoenvironmental engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1290-1293 Titre : Energy-based method for providing soil surface erodibility rankings Type de document : texte imprimé Auteurs : Didier Marot, Auteur ; Pierre-Louis Regazzoni, Auteur ; Tony Wahl, Auteur Année de publication : 2012 Article en page(s) : pp. 1290-1293 Note générale : Géotechnique Langues : Anglais (eng) Mots-clés : Dams Embankment Soil surface erosion Laboratory testing Erosion models Energy Résumé : The jet erosion test (JET) and the hole erosion test (HET) are two tests used to determine soil erodibility classification, and results are commonly interpreted by two distinct methods. A new method based on fluid energy dissipation and on measurement of the eroded mass for interpreting the two tests is proposed. Different fine-grained soils, covering a large range of erodibility, are tested. It is shown that, by using common methods, the erosion coefficient and average critical shear stress are different with the JET and with the HET. Moreover, the relative soils classifications yielded by the two erodimeters are not exactly the same. On the basis of the energy method, an erosion resistance index is determined for both apparatuses, and a classification of surface-erosion resistance is proposed. For both apparatuses, values of the erosion resistance index are roughly the same for each soil, and a single classification of soil erodibility is obtained. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i12/p1290_s1?isAuthorized=no [article] Energy-based method for providing soil surface erodibility rankings [texte imprimé] / Didier Marot, Auteur ; Pierre-Louis Regazzoni, Auteur ; Tony Wahl, Auteur . - 2012 . - pp. 1290-1293. Géotechnique Langues : Anglais (eng) in Journal of geotechnical and geoenvironmental engineering > Vol. 137 N° 12 (Décembre 2011) . - pp. 1290-1293 Mots-clés : Dams Embankment Soil surface erosion Laboratory testing Erosion models Energy Résumé : The jet erosion test (JET) and the hole erosion test (HET) are two tests used to determine soil erodibility classification, and results are commonly interpreted by two distinct methods. A new method based on fluid energy dissipation and on measurement of the eroded mass for interpreting the two tests is proposed. Different fine-grained soils, covering a large range of erodibility, are tested. It is shown that, by using common methods, the erosion coefficient and average critical shear stress are different with the JET and with the HET. Moreover, the relative soils classifications yielded by the two erodimeters are not exactly the same. On the basis of the energy method, an erosion resistance index is determined for both apparatuses, and a classification of surface-erosion resistance is proposed. For both apparatuses, values of the erosion resistance index are roughly the same for each soil, and a single classification of soil erodibility is obtained. DEWEY : 624.1 ISSN : 1090-0241 En ligne : http://ascelibrary.org/gto/resource/1/jggefk/v137/i12/p1290_s1?isAuthorized=no

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