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

Wu, Peng; Hirshfield, Faye; Sui, Jueyi

doi:10.1002/rra.2771

Cited by 20 publications

(11 citation statements)

References 20 publications

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“…With decrease in D50 of the original sand, the grain size of the armour layer decreases correspondingly. These results are in good agreement with findings of Wu et al (2015) who investigated the armour layer in scour holes around square and semi-circular abutments.…”

Section: Grain Size Analysis Of Armour Layersupporting

confidence: 92%

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

Namaee

Sui

2019

Journal of Hydrology and Hydromechanics

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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.

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Section: Grain Size Analysis Of Armour Layersupporting

confidence: 92%

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

Namaee

Sui

2019

Journal of Hydrology and Hydromechanics

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“…It was observed that after about a period of 6 h, scour hole reached to the equilibrium state and no significant changes were observed in scour depth. However, the running experimental time for the present experiments was 24 h to be compatible with the experimental results of Wu et al [51].…”

Section: The Incipient Motion Of Sediment Particles Under Ice-coveredsupporting

confidence: 90%

Experimental Study of Local Scour around Side-by-Side Bridge Piers under Ice-Covered Flow Conditions

Namaee¹,

Sui²,

Wu³

2020

Current Practice in Fluvial Geomorphology - Dynamics and Diversity

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A precise prediction of maximum scour depth (MSD) around piers under icecovered conditions is crucial for the safe design of the bridge foundation. Due to the lack of information for local scour under ice-covered flow condition, it is extremely hard to give proper estimation of MSD. In the current study, a set of flume experiments were completed to investigate local scour around four pairs of circular bridge piers with nonuniform bed materials under open channel, smooth and rough ice cover conditions. Three different bed materials with median particle size of 0.47, 0.50, and 0.58 mm were used to simulate natural river conditions. Regardless of pier size, the maximum scour depths were observed in front of the piers under all flow conditions. Additionally, a smaller pier size and a larger space between piers yield a smaller scour depth. Results showed that the maximum scour depth decreases with increase in the grain size of armor layer. The distribution of vertical velocity shows that the strength of downfall velocity is the greatest under rough ice cover. Empirical equations were developed to estimate the maximum scour depth around side-by-side bridge piers under both open-channel and ice-covered flow conditions.

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“…River ice hydrology has been an implicit part in ice engineering. Some studies on ice engineering research can be found in the references [1,12,22,9,21,23,26,30,32]. To date, the mechanism of local scour around bridge abutments and piers under ice cover is still not well understood.…”

Section: Impact Of Ice Covermentioning

confidence: 99%

“…As suggested by Wu et al [30], the following relationships were developed to show the maximum scour depth under ice cover around square and round abutments:…”

Section: Effects Of Sediment Transport On Hydraulic Structuresmentioning

confidence: 99%

The Impact of Ice Cover and Sediment Nonuniformity on Erosion Around Hydraulic Structures

Wu¹,

Sui²,

Balachandar³

2015

Effects of Sediment Transport on Hydraulic Structures

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Based on two case studies, the impact of ice cover on local scour around bridge piers is presented in this chapter. Bed material with different grain sizes is used and ice covers with different roughness is used to study the scour characteristics. The impact of nonuniformity of sediment is also investigated. Results show that with the increase in densimetric Froude number, there is a corresponding increase in the dimensionless scour depth. For nonuniform sediment, due to the formation of an armor layer, less maximum scour depth was noted around bridge foundation structures compared to uniformly distributed sediment. The increase in ice cover roughness results in a larger scour depth and geometry. The results indicate that it is imperative to pay attention to the impact of ice cover on the scour around hydraulic structures.

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

Cited by 20 publications

References 20 publications

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

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

Experimental Study of Local Scour around Side-by-Side Bridge Piers under Ice-Covered Flow Conditions

The Impact of Ice Cover and Sediment Nonuniformity on Erosion Around Hydraulic Structures

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