| 研究生: |
吳虹邑 Wu, Hung-Yi |
|---|---|
| 論文名稱: |
筐網結構物對橋墩沖刷保護之研究 Penetrant Structure as a Pier Scour Countermeasure |
| 指導教授: |
黃進坤
Huang, Chin-Kun |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 水利及海洋工程學系 Department of Hydraulic & Ocean Engineering |
| 論文出版年: | 2005 |
| 畢業學年度: | 93 |
| 語文別: | 中文 |
| 論文頁數: | 88 |
| 中文關鍵詞: | 筐網結構物 、橋墩沖刷 |
| 外文關鍵詞: | Penetrant structure, Bridge pier, Scour |
| 相關次數: | 點閱:84 下載:2 |
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本文主要目的係開發橋墩基礎保護新型工法-筐網結構物,藉由橋 墩未設置筐網結構物保護措施與設置筐網結構物保護措施情況下,分別比較無保護措施與有保護措施之橋墩沖刷情形。
本研究認為影響筐網結構物對橋墩保護效果的因素主要有:(1)筐網孔隙率、(2)筐網孔徑、(3)筐網設置距離、(4)筐網設置高度與(5)筐網直徑。由試驗資料可決定出筐網抑制橋墩沖刷發展因素的影響順序:(1)筐網直徑、(2)筐網設置高度(3)筐網孔隙率、(4)筐網設置距離、(5)筐網孔徑。
試驗分析結果得知,採用筐網孔徑0.4公分、筐網孔隙率為0.5、筐網直徑與橋墩直徑相同的筐網,設置於與橋墩直徑相等長度的橋墩前方,並將筐網設置高度取4/3倍的水深高度,則筐網結構物能提供橋墩61.98%的保護效果。
Experiments of bridge pier scour are carried out under steady clear-water scour conditions with uniform sediments. The case studies on the use of penetrant structure as a pier scour countermeasure are reported. Based on the experiments of bridge pier scour to study the effect of penetrant structure of the bridge pier on the local scour. Penetrant structure’s various parameters are considered. Laboratory data are used to assess the influence of each parameter.
The results of this study indicate that the local scour depth decreases as the penetrant structure were laid on bridge pier ahead. Penetrant structure improved the protection of bridge pier attained to 61.98%.
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