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    Reduction of scour around circular piers using collars

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    Publication date
    2022-03
    Author
    Pandey, M.
    Pu, Jaan H.
    Pourshahbaz, H.
    Khan, M.A.
    Keyword
    Bridge piers
    Clear-water scour
    Collars
    Scouring reduction
    Uniform sediment
    Rights
    © 2022 The Authors. Journal of Flood Risk Management published by Chartered Institution of Water and Environmental Management and John Wiley & Sons Ltd. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
    Peer-Reviewed
    Yes
    Open Access status
    openAccess
    
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    Abstract
    River dynamics and sediment transport play an important role in river bed morphology. Building a bridge pier along the river alters the cross-section of the river and causes the change in flow processes. These changes are mainly responsible for pier scour. In this paper, the usage of collars to reduce scour around circular piers has been investigated. The collars with different diameters and depth positions have been studied using previous data and additional data collected in the present study to assess their effectiveness in reducing scour. Using a wide range of measured data, an empirical equation to compute the maximum scour depth around the circular piers in the presence of collars has been proposed. The proposed equation has been validated and proven to be applicable to a wide range of pier layouts. It has been found that the maximum efficiency can be achieved by fixing the collar at bed level and adopting a collar diameter 1.5–2.5 times of pier diameter.
    URI
    http://hdl.handle.net/10454/18964
    Version
    Published version
    Citation
    Pandey M, Pu JH, Pourshahbaz H et al (2022) Reduction of scour around circular piers using collars. Journal of Flood Risk Management. e12812.
    Link to publisher’s version
    https://doi.org/10.1111/jfr3.12812
    Type
    Article
    Collections
    Engineering and Informatics Publications

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