臺灣博碩士論文加值系統

本研究主要係以在砂質底床之試驗水槽中拍打不規則波之方式，初步探討海堤堤頂截水牆位置對堤面溯上與越波量之影響情形，並藉與前人固定底床下之相關研究結果進行比較，分析在動床與定床兩種不同情況下，海堤堤面溯上、越波量之差異性，以提供規劃設計與後續研究之參考。
試驗斷面係參考西南海岸地形與海堤斷面以1/15之模型比尺加以佈置，即近灘坡度為1：30之砂質底床上，海堤堤面坡度為1：1.5、堤頂寬為26.7cm，並考量13.3cm及21.3cm兩種堤趾水深；試驗波浪則以2.07、2.58、3.1及3.61sec四種示性週期，分別拍打不同波高大小之不規則波浪。拍打波浪時，同步檢測截水牆在堤前及在堤後兩種位置下之碎波帶波高、堤趾波高、堤面溯上與越波量，以作為分析比較之用。
由無因次參數分析結果顯示，最大2%溯升R2%與碎波參數ξ之相關性較佳，而越波量與出水高參數(R2%/hc-1)之正比關係較為密切，其中hc為海堤堤頂出水高度。在截水牆位置影響分析方面，由分析結果可知截水牆由堤頂前方改換至堤頂後方時溯上減少量雖然不大，然而在越波量方面則是明顯減少很多，越波量約可減少10%~50%。另由本文實驗結果與Kobayashi(1983)、Van der Meer (1992)及Franco(1999)等計算式之比較分析可知，固定底床上有關溯上與越波量之計算值遠大於本文砂質底床上之試驗值，顯有高估之情形。

The influence of parapet position and movable seabed on run-up and overtopping for a seawall is preliminarily studied in the thesis, through the irregular wave experiments in a sand bed flume.
Referring to the section profile of southwestern coast and seawalls, the layout in the flume is made with a model scale of 1/15; the sand bed in slope of 1:30 nearshore and 1:80 offshore, a seawall with a slope of 1:1.5 and crest width of 26.7cm, as well as two kinds water depths (13.3 cm , 21.3 cm) at the toe of seawall. While a sequent of irregular waves were generated with T1/3 =2.07, 2.58, 3.1 and 3.61sec, breaking wave height, wave height in front of the seawall, run-up along the seawall slope and overtopping over the crest were measured simultaneously for dimensionless analysis.
The results reveal that the most 2% larger run-up R2% shows a good relation with the surf parameterξ, and overtopping parameter presents a positively correlation with run-up over the crest parameter(R2%/hc-1) in which q=overtopping quantity per unit width, Hs=significant wave height and hc=freeboard of seawall crest. As to the effect of the parapet position, it is found that the parapet on the backward of crest reduced run-up a little, but the overtopping may be reduced obviously to 10%~50% inversely with hc/Hs. On the other hand, the computed values of run-up and overtopping by Kobayashi (1983), Van der Meer (1992) and Franco(1999) formula for solid seabed were found to over-estimate those experimental values for the sand bed.

目 錄頁次
中文摘要 I
英文摘要 II
誌謝 III
目錄 IV
照片目錄 V
圖目錄 VI
表目錄 X
符號說明 XI
第一章 緒論 1
1-1 前言 1
1-2 文獻回顧 2
1-3 研究目的、方法與本文組織 4
第二章 實驗配置與實驗方法 5
2-1 實驗設備與器材 5
2-2 實驗條件、波浪條件與佈置 7
2-3 實驗方法與步驟 11
第三章 實驗結果分析與討論 13
3-1實驗數據分析與實驗結果分析方法 13
3-2 無因次化分析 21
3-3 不同截水牆位置之溯上與越波量比較 37
3-4 實驗值與前人結果比較 43
3-5 實驗數據回歸 52
第四章 結論與建議 56
參考文獻 57
附錄A 實驗數據表 附錄A1
附錄B 相對溯上與波浪尖銳度關係 附錄B1
附錄C 越波量與無因次參數((R-hc)/H)關係 附錄C1

1. Claudio Franco,Leopoido Franco(1999),’Overtopping Formulas for Caisson Break- waters with Nonbreaking 3D Wave’ , Journal of Waterway,Port,Coastal and Ocean Engineering, Vol.125,No.2,March/April,pp98-108.
2. J.P. de Waal,J.W. Van der Meer (1992),’Wave Runup And Overtopping on Coastal Structure’,Coastal Engineering 1992,pp.1756-1771.
3. Julien DE ROUCK,Raf VERDONCKect. (1998),’Waver Run-up And Overtopping:
Prototype Versus Scale Models’, Coastal Engineering 1998,pp.1039-1052.
4. J.W. Van der Meer,Cor-Jan M. Stam (1992),’Wave Runup on Smooth And Rock Slopes of Coastal Structure’, Journal of Waterway,Port,Coastal and Ocean Engineering,Vol.118 No.5,September/October,pp534-550.
5. L. Franco,M. de Gerloni,J.W. Van der Meer (1994),’Wave Overtopping on Vertical And Composite Breakwaters’, Coastal Engineering 1994,pp.1030-1046.
6. Mogens Hebsgaard,Peter Sloth,Jorgen Juhl (1998), ’ Waver Overtopping of Rubble Mound Breakwater’, Coastal Engineering 1998,pp.2235-2248.
7. Nobuhisa Kobayashi (1983),’Irregular Wave Overtopping on Gravel Islands’,Journal of Waterway,Port,Coastal and Ocean Engineering,Vol.109,No.4,Novermber,pp429-444.
8. Owen,M.W. (1980), ’Design of Seawall allowing for Wave Overtopping’Report EX 924,Hr Walling ,United Kingdom.
9. Scott L. Douglass,Member,ASCE (1992),’ Estimating Extreme Values of Run-up’ , Journal of Waterway,Port,Coastal and Ocean Engineering, Vol.118, No.2, March/ April,pp220-224.
10. Yoshimichi Yamamoto,Kiyoshi Horikawa (1992),’New Methods to Evaluate Wave Run-up and Wave Overtopping Rate’ , Coastal Engineering 1992,pp.1735-11748.
11. 林勝福 (1983)，’斜坡溯升之研究’，國立成功大學碩士論文
12. 郭金棟 (1995),’海岸工程’，中國土木水利工程學會出版
13. 曾自慶 (1988)，’不規則波溯升之試驗研究’，國立成功大學碩士論文
14. 蘇榮昌 (1988)，’不規則波越波量之試驗研究’，國立成功大學碩士論文