EFFECTS OF PILE-GROUP LAYOUTS ON BED DEFORMATION AROUND THE STRUCTURE

Abstract

 Pile-groups are one of the hydraulic structures used for riverbank protection. Controlling the local scour around a pile-group is a desirable attempt for the structural stability. In this study, bed deformations around different pile-groups were investigated experimentally. This research was aimed to depict the effects of pile-group layout parameters on the bed characteristics. The maximum scour depth was well expressed by the modified blockage ratio with an identical trend in all the cases. Increasing the modified blockage ratio resulted in a larger scour and smaller deposition around all types of the pile-groups. Total scour volume in the channel was shown to be almost proportional to the maximum scour depth in all the cases.