Clear-water scour around semi-elliptical abutments with armored beds

Sui, Jueyi; Afzalimehr, Hossein; Samani, Abdolreza Kabiri; Maherani, Mehrnoosh

doi:10.1016/s1001-6279(10)60041-8

Cited by 42 publications

(30 citation statements)

References 25 publications

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“…From regression analysis, one can also notice that the particle size of the armour layer has a strong impact in reducing the dimensionless maximum scour depth. This conclusion is in line with a previous study conducted by Sui et al (2010a). In hydraulic engineering, a mixture of coarse sediments in the vicinity of bridge foundations can reduce maximum scour depth, which has a similar impact as riprap.…”

Section: Ice Roughness and The Armour Layersupporting

confidence: 92%

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Armour Layer Analysis of Local Scour around Bridge Abutments Under Ice Cover

Hirshfield

Sui

2014

River Research & Apps

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A set of experiments was conducted for the local scour around bridge abutments under ice cover in non‐uniform sediments. By taking into account of the grain size of the armour layer and ice cover roughness, the dimensionless maximum scour depth is analysed. With an increase in grain size of the armour layer, the dimensionless maximum scour depth decreases. With the increase in ice cover roughness, the dimensionless maximum scour depth increases correspondingly. By using dimensional analysis, a regression relationship supports this conclusion. The conclusions drawn from this study provide crucial evidence for the protection of bridge foundations in winter time. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Ice Roughness and The Armour Layersupporting

confidence: 92%

“…This conclusion is in line with a previous study conducted by Sui et al . (). In hydraulic engineering, a mixture of coarse sediments in the vicinity of bridge foundations can reduce maximum scour depth, which has a similar impact as riprap.…”

Section: Resultsmentioning

confidence: 99%

Armour Layer Analysis of Local Scour around Bridge Abutments Under Ice Cover

Hirshfield

Sui

2014

River Research & Apps

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“…However, Sui et al [11] indicated an interesting conclusion, that when any armor-layer having the same grain size overlies, the equilibrium scour depth of the scour pit will increase with the increase in the particle size of bed material. Hence, in some special circumstances, the scour depth might deepen with the increasing grain size.…”

Section: Variability Of Sand Mobilitymentioning

confidence: 99%

Variability of Sand Mobility Surrounding Cylinder Object Freely Resting on the Seabed under the Action of Typhoon

Pang¹,

Liu²

2014

IJG

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In sandy sediments, scour and fill is the key process contributed to mine burial. The scour processes surrounding the cylinder mines freely resting on the sandy seabed under the 12-hr combined action of tidal currents and wind-generated waves, especially over typhoon events are numerically simulated using the DRAMBUIE model. The East China Sea is a good case study due to the dominant impact of summer typhoon events on sediment transport and scour. The numerical results show that the scour depth generally increases with time under the combined current and wave stresses exerted on the seabed, while the depth of the scour pit depends on infill once the currents subside. There is a positive relationship between the scour depth and the bottom orbital velocity after experiencing 12-hr wave action including storm waves, while the relation is not linear. The experimental results also display an elevated trend for scour depth with the increase of orbital velocity. The numerical results reveal a surprising phenomenon: the mobility of sand altering with the increasing bed shear stress larger than the certain threshold, which is also manifested as the curves of scour depth with the different grain size might cross each other. For laboratory experiments, the variability of sand mobility does not occur, likely because typhoon storm waves cannot be reproduced in the flume. More numerical tests indicate that the intersection will be triggered by the division of critical Shields parameter. The preliminary analysis suggests that the phenomenon never documented is likely generated from the error of empirical formulae.

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“…This is because the physical process of sediment transport phenomenon has not yet been ideally defined. Jueyi et al [11] stated that a protecting layer of coarser particles formed around the pier is identified as the armor layer. In other words, the formation of an armor layer in a streambed stops the scouring process; however, some finer particles from the stream can be transported downstream through the armored bed [12].…”

Section: Introductionmentioning

confidence: 99%

Local Scour of Armor Layer Processes around the Circular Pier in Non-Uniform Gravel Bed

Pandey

Chen

Sharma

et al. 2019

Water

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Flume experiments have been carried out under clear water scour conditions to analyze the maximum equilibrium scour depth and scour processes in armored streambeds. A total of 85 experiments have been carried out using different diameters of circular piers and non-uniform gravels. A graphical approach for dimensionless scour depth in equilibrium condition around the circular pier in armored streambeds has been developed. As per this curve, the maximum dimensionless scour depth variation with dimensionless armor particle size depends on the densimetric particle Froude number (Frd50), and the decreasing rate of dimensionless scour depth decreases with the value of Frd50.

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Clear-water scour around semi-elliptical abutments with armored beds

Cited by 42 publications

References 25 publications

Armour Layer Analysis of Local Scour around Bridge Abutments Under Ice Cover

Armour Layer Analysis of Local Scour around Bridge Abutments Under Ice Cover

Variability of Sand Mobility Surrounding Cylinder Object Freely Resting on the Seabed under the Action of Typhoon

Local Scour of Armor Layer Processes around the Circular Pier in Non-Uniform Gravel Bed

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