Scour Control around the Inclined Bridge Pier Using Collar

Document Type : Original Article

Authors

1 Agricultural Sciences and Natural Resources University of Khuzestan

2 Associate Professor, Department of Water Engineering, Agricultural Sciences and Natural Resources University of Khuzestan

Abstract

In addition to the strength and stability of the bridges, designers and engineers pay much attention to bridge appearance and scenery, which led to build bridges with inclined piers to the flow. Therefore, studying the hydraulic conditions and scour countermeasure of inclined bridge piers is necessary. In this study, the effect of collar on scour reduction at the base of vertical and angled cylindrical piers was investigated. The collar installed at the surface of the sediment bed for vertical and inclined piers. The result of experiments showed that the highest scour depth belongs to the inclined bridge pier toward the upstream direction, which is 15% more than the vertical pier. However, the maximum scour depth in front of the angled pier toward downstream was measured to be about 30% lower than the vertical pier. For the pier inclined toward the upstream direction, the collar reduced the scour in front of the pier about 63%. The collar for the pier inclined toward the downstream direction decreased the scour by about 67%. The result shows that the installation of collars can have a high effect on reducing the scour depth for inclined piers.

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References

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Irrigation and Water Engineering
Volume 13, Issue 13
August 2023
Pages 61-77

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