ABSTRACT
The aim of the present study is to present the results of tests carried out to explore the effectiveness of the application of a triangular vane made by the six-leg concrete elements as bridge abutment scour countermeasure. A single porous vane at 30 degrees angle to the flow direction is installed at four different distances and three different effective lengths and run under two different clear water flow conditions. By comparison of the bed topography at the end of different test without vane and tests with installed vane, it was found that the maximum scour depth always occurs at the upstream corner of the abutment and significantly decreases with the presence of the vane. Reduction of maximum scour of about 88% can be achieved by installing a single triangular vane in low flow conditions. The appropriate location of the vane was found to be installed at distance equal to the abutment length upstream of the abutment. At this location the best performance was obtained when the vane’s effective length is equal to 81% of the abutment length.
