• ASHVINBHAI LAVAJEEBHAI BARAIYA
• Dr. Rajesh K. Jain

Constriction of the width of streamflow at a bridge site waterway decreases. As a result velocity of flow in river increases, this causes erosion or removal of sediment occurs near to bridge elements. This is known as bridge scour which may cause the failure of the bridge. Therefore, before constructing bridges in the alluvial channel. It is of great importance to estimate accurate scour depth around the bridge elements for safe and economical design. This study presents the scour around the circular compound pier founded in non-uniform sediment. Two types of sediment procured having a mean diameter equal to 2.5 mm and 1.3 mm for the preparation of hydraulic flume bed. In all a total of 27 runs were conducted with three series (1) 70% by weight of median size 2.5 mm mixed with 30% by weight of median size 1.3 mm, (2) 60% by weight of median size 2.5 mm mixed with 40% by weight of median size 1.3 mm and (3) 30% off by the weight median size 2.7 mm mixed with 70% by weight of median size 1.3 mm. In each series total, nine experiments carried out at the different position of the well diameter of footing. The mathematical model proposed by Kumar and Kothiyari (2012) has been used to predict temporal variation and maximum scour depth around the circular compound bridge pier in such sediments. The temporal variation of scour depth is observed and is compared with the mathematical model proposed by Kumar and Kothyari (2012).

Scour, Alluvial channel, Circular compound pier, Scour depth, Non-uniform sediment

"SCOUR AROUND THE COMPOUND PIER FOUNDED IN NON- UNIFORM SEDIMENT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 5, page no.212-218, May-2019, Available :http://www.jetir.org/papers/JETIR1905G30.pdf

"SCOUR AROUND THE COMPOUND PIER FOUNDED IN NON- UNIFORM SEDIMENT", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 5, page no. pp212-218, May-2019, Available at : http://www.jetir.org/papers/JETIR1905G30.pdf