Experimental investigation and flow analysis of clear-water scour around pier and abutment in proximity

Local scour around bridge piers and abutments is one of the most significant causes failure. Despite a plethora studies on individual or abutments, few have focused joint impact pier an abutment in proximity to another scour. This study conducted laboratory experiments flow analyses examine interaction their effect clear-water The were rectangular flume. They included 18 main tests (with combination different types abutments) five control abutments). Three (a with rounded edge, group three cylindrical piers, single pier) two wing–wall semi-circular abutment) used. An acoustic Doppler velocimeter was used measure three-dimensional velocity for streamline, magnitude, vertical velocity, bed shear stress. results showed that near increased by up 80%. maximum depth 19%. In contrast, significantly l71%. presence vicinity led increase hole volume 87% relative case solitary abutment. Empirical equations also derived accurately estimate at adjacent