Author(s): Ali Mahdian Khalili; Pouria Akbari Dadamahalleh; Hossein Sohrabzadeh Anzani; Mehdi Hamidi
Linked Author(s):
Keywords: Bridge pier; Debris; Physical model; River; Scour
Abstract: This study evaluates the influence of wood accumulation on scour around a cylindrical bridge pier via the physical model performed at a hydraulic lab of Babol Noshirvani University of Technology. Two configurations were considered (Ⅰ): a debris box filled with wood higher than the sand surface (partially submerged debris); and (Ⅱ): a debris box exactly on the sand level (fully submerged debris). Scour hole results including depth, width, and length compared with the case pier alone via densimetric Froude number (Fd). Observations showed that wood accumulation reduces the flow cross-section, leading to backwater rise and scour patterns change. The results indicate that scour parameters in all cases increased by increasing Fd. Partially submerged wood configuration resulted in a maximum increase of 73% in scour depth compared to the pier alone. However, at low Fd values, scour depth decreases up to 40% in the fully submerged configuration.
Year: 2024