Experimental Study on Local Scour of Spur Dikes with Different Spacings
|關鍵字:||丁壩;局部沖刷;沖刷坑;河岸侵蝕;spur dike;local scour;scour hole;bank erosion|
Spur dike including permeable, impermeable, submerge and emerge, is currently a common method regarding engineering in our country. After building spur dike, it brings complicated interaction mechanism of water management, sediment, and seabed erosion, which is a worth analyzing process. This experiment focuses on investigating Pistol -shaped Spur dike construction method in Jhuoshuei River. In order to investigate the mechanism of water impact on Gun-shaped Spur dikes, this study concentrates on submerged Gun-shaped Spur dikes test, using long straight flume experiment in clear-water scour condition, and designing different spacing and random Froude number case to observe scour depth change on Gun-shaped Spur dikes. We can use Froude number, water depth of the dam height ratio (h/H) and spacing ratio (D/L), obtaining from the regression equation in the experiment data, to estimate the maximum scour depth as the basis for the practical application of engineering reference.
|Appears in Collections:||Thesis|