Experimental Study on the Reciprocal Effect of Overfall Flow Scour and Bridge Scour

• Main Authors: Chung-Chieh Chang, 張忠潔
• Other Authors: Jinn-Kuen Hwang
• Format: Others
• Language: zh-TW
• Published: 2002
• Online Access: http://ndltd.ncl.edu.tw/handle/4wxf52

碩士 === 國立成功大學 === 水利及海洋工程學系碩博士班 === 90 === This paper mainly inquired about the relationship between the effect of both local scour holes which a pier on submerged overfall flow or free overfall flow. From this experiment and the result of analyze we can find that the main effective factor of pier scour is strength and direction of overfall jets and the type of channel bed located is the second effective factor. We another find when we located the pier on upstream of scour hole on free overfall flow not only does not cause the deeper local scour holes than pure overfall fall, but also provide the function to protect channel bed; when we located the pier with deepest on submerged overfall flow, the biggest scour point of experiment shoe beside the downstream pier not around the pier.