Velocity Modification at the Bridge Abutments because Scour

IOP Conference Series: Materials Science and Engineering 2019
Boriss Gjunsburgs, Mārtiņš Vilnītis, Jana Parilkova, Mārīte Bižāne-Rožnovska

Relative local flow modification at the bridge abutment at plain river bed, relative local and critical velocities changes during scour at steady and unsteady flow, uniform bed and at bed layering is studied. Comparison of the local velocity with approach flow and mean velocity under the bridge opening was made. The local velocity Vlt is reducing and the critical velocity V0t is increasing because of the scour within the time step at steady or at unsteady flow. When relative local velocity βV0t/Vlt becomes equal to one the scour stops. For unsteady flow local and critical velocities are different at any steps of hydrograph because of the increased flow discharge and the scour depth.

Keywords
Velocity,scour,time
DOI
10.1088/1757-899X/660/1/012028
Hyperlink
https://iopscience.iop.org/article/10.1088/1757-899X/660/1/012028

Gjunsburgs, B., Vilnītis, M., Parilkova, J., Bižāne, M. Velocity Modification at the Bridge Abutments because Scour. In: IOP Conference Series: Materials Science and Engineering, Latvia, Riga, 25-27 September, 2019. IOP: IOP Publishing Ltd, 2019, pp.125-132. ISSN 1757-8981. e-ISSN 1757-899X. Available from: doi:10.1088/1757-899X/660/1/012028

Publication language
English (en)