Laboratory Study of Cable and Sill Protection on Scouring Pattern Around the Bridge Pier

Document Type : Research Paper


1 Water and Environmental Science Research Center, Islamic azad University, Shoushtar Branch, Shoushtar, Iran

2 Water Science and Environment, Shoushtar Branch, Islamic Azad University, Shoushtar, Iran

3 Assistant proffessor civil department , Sepidan Branch, Islamic Azad University, Sepidan, iran


Local scouring around the bridge pier is the leading causes of their destruction. Thus, to reduce and control this phenomenon, numerous researches have been done and many solutions have been suggested. These solutions are classified in two parts, direct and indirect protections methods. In this study, by definition different scenarios, both protection methods and their combined effects were investigated. In this research, cable around piers, as an indirect method, and sill as a direct method were used. Different locations of the sill (front and back of the pier) and the cable around the pier with relative pitch equal to 0.33, 0.50 and 0.67 in clean water conditions were investigated. In the best case, the pier with a front sill and a relative cable pitch of 0.33, has the least amount of scouring. This pier has the highest amount of scour depth reduction with 63% among the other scenarios. In this regard, the pier with a back sill and a relative cable pitch of 0.33, showed 45% reduction in scouring. This indicates that under the same conditions, with the sill movement from the back to the front of the pier, scouring depth parameter improved 18 percent.


Main Subjects

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