Experimental Studies Of Local Scour At Cylindrical Pier Fitted With Collar

• Published in: I-Manager's Journal on Civil Engineering Vol. 3; no. 3; pp. 10 - 15
• Main Authors: Singh, Sabita Madhvi, Maiti, P.R.
• Format: Journal Article
• Language: English
• Published: Nagercoil iManager Publications 15.08.2013
• Subjects: Bridges; Civil engineering; Rivers
• ISSN: 2231-1068; 2249-0779
• DOI: 10.26634/jce.3.3.2387

Flow in an open channel with an erodible bed is usually accompanied by transport of sediments. Scour may occur as a result of natural changes of flow in the channel or as a result of man-made activities, such as construction of bridge pier structures in river bed. The present study aims to investigate the intense of local scour around circular pier fitted with collar. For this purpose, experiments are carried out in the laboratory flume. The channel of the bed is prepared by laying uniform size of Ganga sand. In this study, the sand bed in the open channel is similar to erodible bed with two rigid wall boundary of the flume. The two collars are used with dimensions 2D and 3D with eccentric to the cylindrical pier, where D is the diameter of cylindrical pier. The effect of collar on scour is studied experimentally and presented. The efficiency of reduction of scouring is observed when the pier is fitted with collar.