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Local scour at bridge abutments in cohesive soil / Mokhles M. Abou-Seida in Journal of hydraulic research, Vol. 50 N° 2 (Mars/Avril 2012) 

Public ISBD [article]  in Journal of hydraulic research > Vol. 50 N° 2 (Mars/Avril 2012) . - pp. 171-180 Titre : Local scour at bridge abutments in cohesive soil Type de document : texte imprimé Auteurs : Mokhles M. Abou-Seida, Auteur ; Gamal H. Elsaeed, Auteur ; Tarek M. Mostafa, Auteur Année de publication : 2012 Article en page(s) : pp. 171-180 Note générale : Hydraulique Langues : Anglais (eng) Mots-clés : Bridge  abutment  Cohesive  soil  Experimentation  Open  channel  flow  Scour Résumé : The results of a laboratory investigation on local scour at bridge abutments in cohesive soils are presented. Kaolin clay was used as a bed material and vertical wall abutments with three different sizes. Forty experiments were conducted under clear-water conditions in cohesive soil with a clay content ranging from 2 to 20%, compaction ranges from 57 to 88%, liquidity index ranges from 0.03 to 0.99 and the approach flow Froude numbers from 0.3 to 0.55. Equations were developed to predict the equilibrium scour pattern around the vertical bridge abutment, including the maximum scour depth, scour volume, scour width, lateral side slope, and longitudinal slopes of the scour hole, in terms of the dominating factors controlling the scour process, namely the Froude number, clay content, compaction, water content, liquid limit, plastic limit, and vertical-wall abutments dimensions. Also, an equation was developed to predict the development of scour depth with time. Comparisons with previous results are also discussed. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2012.654668 [article] Local scour at bridge abutments in cohesive soil [texte imprimé] / Mokhles M. Abou-Seida, Auteur ; Gamal H. Elsaeed, Auteur ; Tarek M. Mostafa, Auteur . - 2012 . - pp. 171-180. Hydraulique Langues : Anglais (eng) in Journal of hydraulic research > Vol. 50 N° 2 (Mars/Avril 2012) . - pp. 171-180 Mots-clés : Bridge  abutment  Cohesive  soil  Experimentation  Open  channel  flow  Scour Résumé : The results of a laboratory investigation on local scour at bridge abutments in cohesive soils are presented. Kaolin clay was used as a bed material and vertical wall abutments with three different sizes. Forty experiments were conducted under clear-water conditions in cohesive soil with a clay content ranging from 2 to 20%, compaction ranges from 57 to 88%, liquidity index ranges from 0.03 to 0.99 and the approach flow Froude numbers from 0.3 to 0.55. Equations were developed to predict the equilibrium scour pattern around the vertical bridge abutment, including the maximum scour depth, scour volume, scour width, lateral side slope, and longitudinal slopes of the scour hole, in terms of the dominating factors controlling the scour process, namely the Froude number, clay content, compaction, water content, liquid limit, plastic limit, and vertical-wall abutments dimensions. Also, an equation was developed to predict the development of scour depth with time. Comparisons with previous results are also discussed. DEWEY : 627 ISSN : 0022-1686 En ligne : http://www.tandfonline.com/doi/abs/10.1080/00221686.2012.654668