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Détail de l'auteur
Auteur Hans Sellmeijer
Documents disponibles écrits par cet auteur
Affiner la rechercheFine-tuning of the backward erosion piping model through small-scale, medium-scale and IJkdijk experiments / Hans Sellmeijer in European journal of environmental and civil engineering, Vol. 15 N° 8 (Août 2011)
[article]
in European journal of environmental and civil engineering > Vol. 15 N° 8 (Août 2011) . - pp. 1139-1154
Titre : Fine-tuning of the backward erosion piping model through small-scale, medium-scale and IJkdijk experiments Titre original : Identification du modèle d'érosion régressive sur des expérimentations à petite et moyenne échelle, et sur l'expérimentation IJkdijk Type de document : texte imprimé Auteurs : Hans Sellmeijer, Auteur ; Juliana Lopez de la Cruz, Auteur ; Vera M. Van Beek, Auteur Année de publication : 2012 Article en page(s) : pp. 1139-1154 Note générale : Génie Civil Langues : Anglais (eng) Mots-clés : Experiments Backward erosion Piping model Multivariate analysis Permeability Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A semi-theoretical model is available to estimate the effect of backward erosion piping by underseepage in a dike by computing the critical head. The model accounts for the groundwater flow through the subsoil, pipe flow through the erosion channel and a limited particle equilibrium at the bottom of the channel. This model is extended and updated with the results of a wide range of tests presented in the paper of (Van Beek et al., 2011). The smallscale tests are analyzed by means of a multivariate regression in order to identify the level of influence of each variable. The regression outcome for the permeability corresponds precisely with the outcome of the prediction rule. The effect of relative density, uniformity and particle roundness is empirically dealt with. The role of the particle size is adapted in the new empirical formulation. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16704 [article] Fine-tuning of the backward erosion piping model through small-scale, medium-scale and IJkdijk experiments = Identification du modèle d'érosion régressive sur des expérimentations à petite et moyenne échelle, et sur l'expérimentation IJkdijk [texte imprimé] / Hans Sellmeijer, Auteur ; Juliana Lopez de la Cruz, Auteur ; Vera M. Van Beek, Auteur . - 2012 . - pp. 1139-1154.
Génie Civil
Langues : Anglais (eng)
in European journal of environmental and civil engineering > Vol. 15 N° 8 (Août 2011) . - pp. 1139-1154
Mots-clés : Experiments Backward erosion Piping model Multivariate analysis Permeability Index. décimale : 624 Constructions du génie civil et du bâtiment. Infrastructures. Ouvrages en terres. Fondations. Tunnels. Ponts et charpentes Résumé : A semi-theoretical model is available to estimate the effect of backward erosion piping by underseepage in a dike by computing the critical head. The model accounts for the groundwater flow through the subsoil, pipe flow through the erosion channel and a limited particle equilibrium at the bottom of the channel. This model is extended and updated with the results of a wide range of tests presented in the paper of (Van Beek et al., 2011). The smallscale tests are analyzed by means of a multivariate regression in order to identify the level of influence of each variable. The regression outcome for the permeability corresponds precisely with the outcome of the prediction rule. The effect of relative density, uniformity and particle roundness is empirically dealt with. The role of the particle size is adapted in the new empirical formulation. DEWEY : 624 ISSN : 1964-8189 En ligne : http://ejece.revuesonline.com/article.jsp?articleId=16704 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)
[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