IMPACT OF COLLARS AND BARS IN LESSENING THE NEARBY SCOUR AROUND ROUND AND HOLLOW BRIDGE PIERS
Abstract
In the current work, the productivity of single and twofold collar in decreasing scour rate and profundity around round and hollow extension wharfs was concentrated tentatively. To diminish the strength of wake vortices, various quantities of bars were likewise introduced at the downstream essence of the wharf in mix with a solitary collar. The best outcome was accomplished for twofold collar when the collars were introduced at the streambed level and one wharf measurement beneath bed level. With this game plan the lower collar was not sabotaged following 80 hours of trial, appearing around 56 % decrease in scouring contrasted and an unprotected dock. It was likewise shown that by utilizing collars, the pace of scouring diminished impressively. However establishment of bars didn't fundamentally diminish the greatest profundity of scour, it delayed the start of scouring at the upstream essence of the wharf.
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