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Observations on the process of backward erosion piping in small-, medium- and fullscale experiments / Vera M. Van Beek in European journal of environmental and civil engineering, Vol. 15 N° 8 (Août 2011) 

Public ISBD [article]  in European journal of environmental and civil engineering > Vol. 15 N° 8 (Août 2011) . - pp. 1115-1137 Titre : Observations on the process of backward erosion piping in small-, medium- and fullscale experiments Titre original : Observations du processus d'érosion régressive avec des expériences à petite, moyenne et grande échelle Type de document : texte imprimé Auteurs : Vera M. Van Beek, Auteur ; Han Knoeff, Auteur ; Hans Sellmeijer, Auteur Année de publication : 2012 Article en page(s) : pp. 1115-1137 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Backward  erosion  Piping  Observation  Phases  Experiment  Full-scale  Laboratory  work Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Small-, medium- and full-scale experiments are performed to investigate the process of backward erosion piping and to validate the model of Sellmeijer. The observed processes are described in this article and are divided in four phases: seepage, backward erosion, widening of pipe and levee failure. Initially the erosion activity consists of very limited not noticeable sand transport. Increase of hydraulic head results in backward erosion, marked by the occurrence of continuously sand transporting sand boils. The transition from backward erosion to the widening of the pipe cannot be observed by the amount of transported sand or the flow rate. Failure can take place within a short time. The swift transformation of small sand boils to levee failure therefore appears to be extremely hazardous when determining the seriousness of piping underneath a levee. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16703 [article] Observations on the process of backward erosion piping in small-, medium- and fullscale experiments = Observations du processus d'érosion régressive avec des expériences à petite, moyenne et grande échelle [texte imprimé] / Vera M. Van Beek, Auteur ; Han Knoeff, Auteur ; Hans Sellmeijer, Auteur . - 2012 . - pp. 1115-1137. Génie Civil Langues : Anglais (eng) in European journal of environmental and civil engineering > Vol. 15 N° 8 (Août 2011) . - pp. 1115-1137 Mots-clés : Backward  erosion  Piping  Observation  Phases  Experiment  Full-scale  Laboratory  work Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : Small-, medium- and full-scale experiments are performed to investigate the process of backward erosion piping and to validate the model of Sellmeijer. The observed processes are described in this article and are divided in four phases: seepage, backward erosion, widening of pipe and levee failure. Initially the erosion activity consists of very limited not noticeable sand transport. Increase of hydraulic head results in backward erosion, marked by the occurrence of continuously sand transporting sand boils. The transition from backward erosion to the widening of the pipe cannot be observed by the amount of transported sand or the flow rate. Failure can take place within a short time. The swift transformation of small sand boils to levee failure therefore appears to be extremely hazardous when determining the seriousness of piping underneath a levee. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16703