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Volume 14
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10.3390/w14132034
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Article

Scour at a Submerged Square Pile in Various Flow Depths under Steady Flow

by
Shengtao Du
1,
Guoxiang Wu
2,*,
Bingchen Liang
3,
David Z. Zhu
1 and
Risheng Wang
4
1
School of Civil and Environmental Engineering, Ningbo University, Ningbo 315211, China
2
College of Engineering, Ocean University of China, Qingdao 266100, China
3
Shandong Provincial Key Laboratory of Ocean Engineering, College of Engineering, Ocean University of China, Qingdao 266100, China
4
College of Civil Engineering, Shandong Jiaotong University, Jinan 250357, China
*
Author to whom correspondence should be addressed.
Water 2022, 14(13), 2034; https://doi.org/10.3390/w14132034
Submission received: 12 May 2022 / Revised: 15 June 2022 / Accepted: 23 June 2022 / Published: 25 June 2022
(This article belongs to the Special Issue Research on Scour and Protection of Offshore Structures)
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Abstract

Local scour around submerged piles in currents are common in coastal and offshore engineering. This paper studies the influences of the submergence ratio (flow depth to pile height) on local scour around a square pile in steady flow. Submergence ratio ranging from 1–4, as well as two unsubmerged tests, were tested with a 10 × 10 square pile of 20 cm height. The three-dimensional profiles were measured to study the scour and deposition characteristics. Results show that the maximum scour depth was always at the upstream corner points rather than at the symmetry center point of the pile. The temporal maximum scour depth achieved its equilibrium sate in less than 4 h for each test. The equilibrium scour depths at the upstream corner points were independent of the submergence ratio when the latter was larger than 1.5. These findings give meaningful reference to the numerical simulations and local scour depth protections in the submerged pile cases deeper than which the flow depth does not affect the equilibrium scour depth.
Keywords: local scour; flow depth; sediment; equilibrium scour depth; clear-water scour local scour; flow depth; sediment; equilibrium scour depth; clear-water scour

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MDPI and ACS Style

Du, S.; Wu, G.; Liang, B.; Zhu, D.Z.; Wang, R. Scour at a Submerged Square Pile in Various Flow Depths under Steady Flow. Water 2022, 14, 2034. https://doi.org/10.3390/w14132034

AMA Style

Du S, Wu G, Liang B, Zhu DZ, Wang R. Scour at a Submerged Square Pile in Various Flow Depths under Steady Flow. Water. 2022; 14(13):2034. https://doi.org/10.3390/w14132034

Chicago/Turabian Style

Du, Shengtao, Guoxiang Wu, Bingchen Liang, David Z. Zhu, and Risheng Wang. 2022. "Scour at a Submerged Square Pile in Various Flow Depths under Steady Flow" Water 14, no. 13: 2034. https://doi.org/10.3390/w14132034

APA Style

Du, S., Wu, G., Liang, B., Zhu, D. Z., & Wang, R. (2022). Scour at a Submerged Square Pile in Various Flow Depths under Steady Flow. Water, 14(13), 2034. https://doi.org/10.3390/w14132034

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