Author(s): Yasser A. Moussa, Mahmoud Atta
Linked Author(s): Yasser Moussa
Keywords: hydraulic structure, local scour, pile groups, bridge, local scour
Abstract: Analysis of local scour at pile groups was conducted. These piles are widely used to support bridge foundations on deep alluvial riverbeds. The supporting area of such piles can be arranged in the form of one or more piles. The effect of different arrangements of such piles on the stability of hydraulic structures was investigated experimentally and numerically. Eight models of piles were investigated under different flow conditions. The cap of these piles are above the water surface. A numerical model, that is, Sediment Simulation in Water Intakes with Multiblock Option program, is developed to simulate scour around bridge pile groups. This model solves the three-dimensional Navier-Stokes equations and the bed load conservation equation. The k�? turbulence model is used to solve the Reynolds stress term. Notably, the tandem pile arrangement reduces the local scour depth by 42% compared with the one-pile case. Results of simulation models showed a distinct correlation with experimental data
Year: 2017