Scour at Bridge Foundations in Supercritical Flows: An Analysis of Knowledge Gaps - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Water Année : 2019

Scour at Bridge Foundations in Supercritical Flows: An Analysis of Knowledge Gaps

Résumé

The scour at bridge foundations caused by supercritical flows is reviewed and knowledge gaps are analyzed focusing on the flow and scour patterns, available measuring techniques for the laboratory and field, and physical and advanced numerical modeling techniques. Evidence suggests that the scour depth caused by supercritical flows is much smaller than expected, by an order of magnitude compared to that found in subcritical flows, although the reasons for this behavior remain still unclear. Important questions on the interaction of the horseshoe vortex with the detached hydraulic-jump and the wall-jet flow observed in supercritical flows arise, e.g., does the interaction between the flow structures enhance or debilitate the bed shear stresses caused by the horseshoe vortex? What is the effect of the Froude number of the incoming flow on the flow structures around the foundation and on the scour process? Recommendations are provided to develop and adapt research methods used in the subcritical flow regime for the study of more challenging supercritical flow cases.
Fichier principal
Vignette du fichier
water-11-01656-v2.pdf (6.66 Mo) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte
Loading...

Dates et versions

hal-02381461 , version 1 (26-11-2019)

Identifiants

Citer

Oscar Link, Emmanuel Mignot, Sébastien Roux, B. Camenen, Cristian Escauriaza, et al.. Scour at Bridge Foundations in Supercritical Flows: An Analysis of Knowledge Gaps. Water, 2019, 11 (8), pp.1656. ⟨10.3390/w11081656⟩. ⟨hal-02381461⟩
81 Consultations
36 Téléchargements

Altmetric

Partager

Gmail Facebook X LinkedIn More