臺灣博碩士論文加值系統

　　本文旨在研究海堤覆面層及堤趾護基均採用孔隙結構物時，其物理特性 ( 孔隙率、相對長度、相對厚度 ) 對海堤面波浪溯升之影響。試驗時海堤之孔隙覆面層厚度固定為0.2倍水深，然後變化護基之厚度及長度，配合各種波浪條件，進行波浪溯升試驗，共使用四種不同孔隙率之孔隙材料，更換兩種海堤面坡。就試驗結果顯示：海堤相對溯升隨著孔隙率增加而減少，且海堤面坡較緩時，孔隙材料降低溯升值效果更為明顯。此外試驗結果更顯示在相對水深較小時，採用孔隙材料對減低溯升值之效果大於相對水深較大時，而且增加孔隙護基厚度之效果大於增加護基長度。最後，本文將試驗數據進行迴歸分析，建立相對溯升值、波浪尖銳度、孔隙率、護基相對厚度與相對長度之關係式，提供海堤設計者之參考。

　The cover-layer and the apron of a seawall were considered to be placed with porous structure. Then the effects of the physical property of the porous structure on the wave run-up over the seawall were investigated experimentally. In the experiments, the thickness of the porous cover-layer was chosen as 0.2 times water depth. Then the wave run-up tests were conducted at various wave conditions, having the thickness and length of the apron changed from case to case. A total of four types of porous structures were adopted and two kinds of seawall slopes were used. The experimental results showed that the wave run-up over the seawall decreases as porosity increases. Moreover, if seawall slope becomes milder, the porous structure would reduce the wave run-up even further. Adopting porous structure as cover-layer and apron of seawall would reduce a larger amount of wave run-up in small water depth than in deep water depth. Increasing the thickness of the apron would influence more on reducing the wave run-up than increasing its thickness does. Finally, regression analysis was conducted and wave run-up formulas were established relating to those factors such as wave steepness, porosity, relative thickness and relative length of apron.

中文摘要………………………………………………………………………Ⅰ
英文摘要………………………………………………………………………Ⅱ
誌謝……………………………………………………………………………Ⅲ
目錄……………………………………………………………………………Ⅳ
表目錄…………………………………………………………………………Ⅵ
圖目錄…………………………………………………………………………Ⅶ
照片目錄………………………………………………………………………Ⅹ
符號說明………………………………………………………………………ⅩⅠ
第一章　緒論…………………………………………………………………1
1-1　前言………………………………………………………………………1
1-2　溯升定義及現象描述……………………………………………………2
1-3　前人研究…………………………………………………………………2
1-4　研究目的…………………………………………………………………4
1-5　本文架構…………………………………………………………………4
第二章　理論與無尺度分析……………………………………………………5
第三章　試驗設備、佈置、量測方法…………………………………………7
3-1　試驗設備…………………………………………………………………7
3-1-1　試驗水槽………………………………………………………………7
3-1-2　造波機…………………………………………………………………7
3-1-3　試驗電腦………………………………………………………………7
　　3-1-4　波高計、增幅器…………………………………………………8
3-1-5　堤趾護基模型…………………………………………………………8
3-1-6　海堤斜坡模型…………………………………………………………8
3-2　試驗條件…………………………………………………………………9
3-3　試驗方法與步驟…………………………………………………………9
3-3-1孔隙率之決定……………………………………………………………9
第四章　試驗結果與分析………………………………………………………12
　　4-1　護基尺寸與溯升之關係...………….……………………………12
4-2　護基材料孔隙率與溯升之關係…………………………………………14
4-3　波浪尖銳度與溯升之關係………………………………………………14
4-4　相對溯升經驗式之建立…………………………………………………14
第五章　結論……………………………………………………………………16
參考文獻…………………………………………………………………………49

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