| Titre : | Pier scour in clear water for sediment mixtures (2012) |
| Auteurs : | Junke Guo, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Journal of hydraulic research (Vol. 50 N° 1, Janvier/Février 2012) |
| Article en page(s) : | pp. 18-27 |
| Note générale : | Hydraulique |
| Langues : | Anglais |
| Tags : | Bridge scour CSU equation Hager number Pier Sediment mixture |
| Résumé : | The current pier scour design in the USA is mainly based on the CSU equation, yet a recent incisive evaluation indicates a need to change it because substantial advances were made in the last two decades for understanding the pier scour processes. The objective of this research is then to propose a simplified scour mechanism and a physically-based scour depth equation for practical design purposes. A critical review on selected previous studies is first made to form the basis of this research. A simplified scour mechanism is next proposed in terms of the pressure gradient through flow–structure, flow–sediment and sediment–structure interactions. A hypothesis on the equilibrium scour depth equation is then proposed based on the understanding of the scour mechanism and tested by flume data. Finally, the proposed scour depth equation provides a criterion and a rule of thumb for scour design and evaluation. |
| DEWEY : | 627 |
| ISSN : | 0022-1686 |
| En ligne : | http://www.tandfonline.com/doi/abs/10.1080/00221686.2011.644418 |
