<abstract xmlns="http://www.w3.org/1999/xhtml"><p>In the present study, experiments were conducted in a large-scale flume to investigate the issue of local scour around side-by-side bridge piers under both ice-covered and open flow conditions. Three non-uniform sediments were used in this experimental study. Analysis of armour layer in the scour holes around bridge piers was performed to inspect the grain size distribution curves and to study the impact of armour layer on scour depth. Assessments of grain size of deposition ridges at the downstream side of bridge piers have been conducted. Based on data collected in 108 experiments, the independent variables associated with maximum scour depth were assessed. Results indicate that the densi-metric Froude number was the most influential parameter on the maximum scour depth. With the increase in grain size of the armour layer, ice cover roughness and the densimetric Froude number, the maximum scour depth around bridge piers increases correspondingly. Equations have been developed to determine the maximum scour depth around bridge piers under both open flow and ice covered conditions.</p></abstract>

In the present study, experiments were conducted in a large-scale flume to investigate the issue of local scour around side-by-side bridge piers under both ice-covered and open flow conditions. Three non-uniform sediments were used in this experimental study. Analysis of armour layer in the scour holes around bridge piers was performed to inspect the grain size distribution curves and to study the impact of armour layer on scour depth. Assessments of grain size of deposition ridges at the downstream side of bridge piers have been conducted. Based on data collected in 108 experiments, the independent variables associated with maximum scour depth were assessed. Results indicate that the densi-metric Froude number was the most influential parameter on the maximum scour depth. With the increase in grain size of the armour layer, ice cover roughness and the densimetric Froude number, the maximum scour depth around bridge piers increases correspondingly. Equations have been developed to determine the maximum scour depth around bridge piers under both open flow and ice covered conditions.

Impact of armour layer on the depth of scour hole around side-by-side bridge piers under ice-covered flow condition

Journal of Hydrology and Hydromechanics

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

In the present study, experiments were conducted in a large-scale flume to investigate the issue of local scour around side-by-side bridge piers under both...

Impact of armour layer on the depth of scour hole around side-by-side bridge piers under ice-covered flow condition

Published Online: Jun 26, 2019

Page range: 240 - 251

Received: Apr 16, 2018

Accepted: Jul 23, 2018

DOI: https://doi.org/10.2478/johh-2019-0010

Keywords
Armour layer, Local scour, Bridge pier, Ice cover, Non-uniform sand, Erosion of river-bed

© 2019 Mohammad Reza Namaee et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Impact of armour layer on the depth of scour hole around side-by-side bridge piers under ice-covered flow condition

Published Online: Jun 26, 2019

Page range: 240 - 251

Received: Apr 16, 2018

Accepted: Jul 23, 2018

DOI: https://doi.org/10.2478/johh-2019-0010

KeywordsArmour layer, Local scour, Bridge pier, Ice cover, Non-uniform sand, Erosion of river-bed

© 2019 Mohammad Reza Namaee et al., published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Armour layer, Local scour, Bridge pier, Ice cover, Non-uniform sand, Erosion of river-bed