CRITICAL SHEAR STRESS NEAR BRIDGE PIER FOR NON-UNIFORM SEDIMENTS

Abstract

This paper describes the main reason of local scour are generally classified into flow condition, structure, and riverbed material used in it and to obtain the simple critical shear stress for the non-uniform sediments. Scouring is significant factor which affects on the safety of bridges. Scouring develops around the pier on the bed channel with non-uniform sediments achieve the great on scour depth prediction. In this a flume experiment has been conducted to predict the relative parameters of shear stress for various size of pier diameter and scour depth using the non-uniform sediments. From the analysis a relationship between shear stress and it’s scour depth may be developed.