بررسي آزمايشگاهي تاثير قرارگيري سري پره هاي مستغرق در بالادست پايه استوانه اي در كاهش آب شستگي

Experimental Assessment of Submerged Vanes Effect on Scour Reduction Located on the Upstream Face ofCylindrical Pier

Scouring is one of the destructive factors in the hydraulic structures such as bridges. It occurs mainly during flood events. To find the most effective countermeasure to protect water structures against scouring phenomena, extensive investigations have been performed. One of such methods is to use submerged series of vanes which is not fully investigated yet. In this study, two series of submerged vanes were used either separately or attached to the upstream face of bridge pier and arranged symmetrically on different positions and angles of attack to control scour at cylindrical pier under clear water condition. The results showed that the highest reduction in scour depth occurs as the vanes series stands closer to the pier. Under the best condition, scour depth was reduced by 80.9 percent.