中文摘要:本文主要以成功筐網群(CKPB)做為防止橋墩沖刷的保護方法，成功筐網群經由多位前人研究裡面獲得證實，在實驗室與天然河川的小尺寸模型試驗中獲得良好的保護效果，並將其結果實際應用於急水溪支流龜重溪台南市東山區大埔橋的橋墩保護上。成功筐網保護工是依水流流向佈置於橋墩迎水面上游6公尺處，以立體三角形的方式排列，其底寬4m、高4m，使用H型鋼(200*200)組裝成架構，筐網以6支為一組，每組高度2m，直徑90cm，底部設有轉動滾軸增加擾流作用。佈置完成後歷經2009及2010年的數次豪大雨及莫拉克颱風(2009年)凡那比(2010年)颱風的洪水作用，在橋墩週圍的底床泥砂淤積高程比主深槽為高，高差約2m，橋墩迎水面上游流速減緩，主要水流經筐網導流後往兩橋墩中間迅速通過，以達到控制橋墩沖刷的目的；同時大量漂流物被筐網群所阻攔，橋墩處完全沒有附著，完全可以防止漂流物撞擊橋墩而達到良好的保護效果。

Abstract:This paper will use the Cheng-Kung porous basket (CKPB) structure to reduce the pier scour depth. The method tested and verified is a good effect to protect the pier against scour. Now, we will apply the CKPB to the Tai-Po Bridge located at the Jishuei River. The CKPB is set upstream the pier with a triangle shape according to the flow direction. The set of the CKPB has six piles and 2 m height alignment of stereoscopic triangle, its bottom breadth 4 m, high 4 m, the usage H type steel(200*200) assembles into structure Each high 2 m, the diameter 90 cm, the bottom establishes to turn to move to roll stalk increment Rao to flow a function. From 2009 to 2010 it was gone many large flows and two typhoons, Morakot and Fanapi. The results show a better protection for the piers against scour. The piers can be impacted with a low velocity when the flow passes through the CPKB. The level of the bed bottom at pier is higher than at the main channel. The high velocity flow passes through among two piers and the low velocity flow happens at the upstream pier. The piers are stuck nothing because many drifters are obstructed by the CKPB.

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