Birla Institute of Technology, Mesra, Ranchi.
The modern method of constricting a wide river for the construction of bridges is by placing two guide bunds, adequately protected at a distance apart such that the river flows through the resulting waterway with a slightly higher velocity. The guide bank has, at its upstream and downstream ends, heads of suitable curvature so as to guide the flow through the bridge and to reduce the swirling action of the water at exit.
The paper gives the remits of experiments conducted to find the effect of composite curves for heads of guide banks on the flow pattern and the maximum scour depth.
