Abstract
Experiments of the local scour around twin piers are carried out under steady clear-water conditions, including 95 tests to observe the influence of the pier spacing and the flow velocity on the local scour characteristics of the twin piers. It is shown that the start of the transition region is synchronous with the sediment transport from the upstream scour hole to the downstream one. The equations for the critical velocities are derived to quantify the velocity range of each of four different scour regions. Finally, a prediction formula of the downstream pier scour depth in the radical-deviation region is established.
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Acknowledgements
This work was supported by the Fundamental Research Funds for the Central Universities (Grant No. 2017B12214), the Colleges and Universities in Jiangsu Province Plans to Graduate Research and Innovation (Grant No. KYZZ_0146), and the Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD).
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Project supported by the National Natural Science Foundation of China (Grant No. 51279046).
Biography: Quan-shuai Liu (1989-), Male, Ph. D.
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Liu, Qs., Tang, Hw., Wang, H. et al. Critical velocities for local scour around twin piers in tandem. J Hydrodyn 30, 1165–1173 (2018). https://doi.org/10.1007/s42241-018-0122-6
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DOI: https://doi.org/10.1007/s42241-018-0122-6