Investigation of abutment effect on scouring around inclined pier at a bend

Abstract

In this paper, in order to investigate the effects of abutments in presence of a pier on scour depth and bed topography alteration, a series of tests were carried out considering abutments with a length twice that of the pier and vertical and inclined piers with their inclination towards upstream, downstream, inner and outer banks. The results show that the maximum scour depth is formed at the upstream side of the outer abutment in all tests. Maximum scour depths are formed at the angle of 89 degrees if the bend section between 92% and 94% of the channel’s width from the inner bank in all tests except in the case of abutments with one pier which is inclined towards downstream. In the latter case, maximum scour depth is formed at the angle of 90 degrees and at the point 88% of the channel’s width from the inner bank.

Keywords:

• Bed topography
• scouring
• abutment
• inclined pier
• sediment mound
• 180-degree bend

Additional information

Notes on contributors

Shaghayegh Ben Mohammad Khajeh

Shaghayegh Ben Mohammad Khaje was born in Shiraz, Iran, in 1991. He earned M.Sc. degrees in Hydraulic Structures from Persian Gulf University, Bushehr, Iran, in 2016, correspondingly. His research interests are in the areas of River Engineering, Hydraulic Structures, and sedimentation. He is the author of 1published paper in journals.

Mohammad Vaghefi

Mohammad Vaghefi was born in Shiraz, Iran, in 1973. He earned B.Sc. and M.Sc. degrees in Civil Engineering from Shiraz University, Iran, in 1997 and 1999, respectively, and a PhD degree, from Tarbiat Modares University, Tehran, Iran, in 2009. He is currently the Associate Professor of Civil Engineering at Persian Gulf University, Bushehr, Iran. His areas of interest include Hydraulic Engineering, Fluid Mechanics, Open Channel Hydraulics, River Engineering, Water Flow Engineering, Hydrodynamics, and Hydraulic Structures. He has presented 220 papers at national and international conferences and has published 110 journal papers.