SCOUR MITIGATION AT BRIDGE PIERS USING SACRIFICIAL PILES

查看全文 作　　者：M. Anisul [1]HAQUE;Md. Munsur [2]RAHMAN;G.M. Tarekul [2]ISLAM;M. Asad [3]HUSSAIN 机构地区：[1]Prof.Institute of Water and Flood Management (IWFM), Bangladesh University of Engineering and Technology (BUET) Dhaka-1000, Bangladesh;[2]Assoc. Prof.Institute of Water and Flood Management (IWFM), Bangladesh University of Engineering and Technology (BUET) Dhaka-1000, Bangladesh;[3]Lecturer,Institute of Water and Flood Management (IWFM), Bangladesh University of Engineering and Technology (BUET) Dhaka-1000, Bangladesh 出　　处：《International Journal of Sediment Research》索引2007年第22卷第1期,共11页 摘　　要：To mitigate scour around bridge piers, sacrificial piles are economic method where natural processes are involved. The arrangement should be such that scoured materials from the sacrificial piles should have enough volume to fill the scour hole created upstream of the pier in such a way that sediments are trapped inside the scour hole. This concept differs from earlier study made with sacrificial piles that mainly deals to reduce the strength of horseshoe vortex. To determine the effect of sacrificial piles for scour mitigation, alternative arrangements of piles were tested in front of a rectangular pier under clear-water condition and found that when the group of piles is placed at a distance of twice the projected width of the pier, for which percentage of blockage of the pier width is 60%, the scour volume can be reduced upto 61% while the maximum scour depth can be reduced upto 50%. 关 键 词：桥墩 水流冲刷 减缓方法 消能桩 优化排列