Scour Reduction around Bridge Pier Using the Airfoil-Shaped Collar

Scouring around the bridge pier is a natural and complex phenomenon that results in bridge failure. Failure of bridges have potential devastation and public safety and economic loss, which lead to political consequences and environmental impacts. Therefore, it is essential to countermeasure the scou...

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Bibliographic Details
Published in:Hydrology 2023-04, Vol.10 (4), p.77
Main Authors: Gupta, Lav Kumar, Pandey, Manish, Raj, P. Anand, Pu, Jaan H.
Format: Article
Language:English
Subjects:
airfoil-shaped collar
Airfoils
Bridge failure
Bridge failures
Bridge piers
Bridges
Collars
Design specifications
Dimensional analysis
Economic impact
efficiency of the collar
Environmental aspects
Environmental impact
Experiments
Failure
Flow velocity
FLOW-3D
Foundations and piers
Highway construction
Hydrology
India
Isobaths
Laboratories
Particle size
Public safety
Reduction
Reynolds number
Scour
Scour and fill (Geomorphology)
scour countermeasure
scour hole profile
Scouring
Sediment
Sediments
Sediments (Geology)
Three dimensional flow
Water depth
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Summary:Scouring around the bridge pier is a natural and complex phenomenon that results in bridge failure. Failure of bridges have potential devastation and public safety and economic loss, which lead to political consequences and environmental impacts. Therefore, it is essential to countermeasure the scour around the bridge pier. This paper studies the effects of four different airfoil-shaped collars (i.e., bc1 = 1.5b, bc2 = 2.0b, bc3 = 2.5b and bc4 = 3.0b, where bc and b are the diameter of the airfoil-shaped collar and pier, respectively) as a scour countermeasure. All the experiments are conducted under clear water conditions with uniform sediment and a constant water depth (y) of 10 cm. Airfoil-shaped collar is placed at four elevations, i.e., bed level, y/4, y/2 and 3y/4 above the sediment bed level. It is observed that the maximum percentages of scour reduction of 86, 100 and 100% occurred due to protection provided by the collar bc2, bc3 and bc4, respectively, at sediment bed level. So, collars bc2, bc3 and bc4 are efficient at the sediment bed level. The profiles of scour hole show that the length of the transverse scour hole is greater than that of the longitudinal one. Numerical investigation of the morphological changes in sediment bed and scour depth contours is developed using the FLOW-3D for the pier with and without the airfoil-shaped collar.
ISSN:2306-5338
2306-5338
DOI:10.3390/hydrology10040077