Mapping scour depth around group bridge pier under controlled conditions

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Majedi Asl Mahdi; Kouhdaragh Mehdi; Fuladipanah Mehdi

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Journal Paper

Paper Information

Journal: JOURNAL OF HYDRAULIC STRUCTURES Year:2022 | Volume:8 | Issue:4 Page(s): 57-72

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Information Journal Paper

Title

Mapping scour depth around group bridge pier under controlled conditions

Author(s)

Majedi Asl Mahdi | Kouhdaragh Mehdi | Fuladipanah Mehdi | Issue Writer Certificate

Keywords

Sediment transport

Control structures

Scouring

Bridge pier

Abstract

As a destructive process, scouring exposes bridge foundations to failure and disastrous consequences. Control structures of various arrangements are capable to change and manage the adverse effects. This paper aims to investigate the effect of submerged vanes of a quasi-triangular arrangement (of heights 0, 4, and 6 cm), eppi, and sills (of height 4.5 and 9 cm) on scour development. All tests were executed in a rectangular slope-less flume covered with sediments of D50=1.8 mm. Temporal and equilibrium scour depth were mapped for Froud numbers: 0.15, 0.2, 0.25, and 0.6. Results clarified the aggregate effect of the eppies on the scour depth due to section contraction. Submerged vanes and sill were set up to deteriorate sediment transport. Although the vane of height 4 cm had the most superior performance, but the sill installation of height 4.5 cm greatly increased vane's effect, so that a remarkable reduction of scour was occurred at the first pier foundation.

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