تغييرات زماني عمق آبشستگي اطراف پايه پل و رابطه تجربي آن

Time Variation of Scour Depth Around Bridge Pier and Its Empirical Formulae

In this study, time variation of scour depth around bridge pier was investigated under clear water condition. It was revealed that more than 80% of the maximum scour depth took place at the first hour of the experiments and then the rate of the scour process decreased sharply. A new definition was introduced for equilibrium time of the scour depth and compared with previous works. The results showed that the previous definitions mostly gave smaller equilibrium time. There was a good agreement between equilibrium scour depth obtained at different conditions with other relationships. The empirical relationship was given to time variation of scour depth and comparison of this relationship with otherʹs showed a good agreement. Keywords: Bridge pier, Clear water, Scour, Time variation