臺灣博碩士論文加值系統

本研究係主要探討心層孔隙率對拋石堤穩定性之影響，並不考慮護層孔隙率變化的影響。在規則波作用下，探討孔隙水壓和堤頂出水高對堤面破壞之影響，而不規則波作用時，則以孔隙水壓成群出現強弱程度的群壓因子來探討與堤面破壞間之關係。結果發現，規則波作用下，堤面破壞值隨波高增加且隨相對堤頂出水高減少而變大，但在孔隙率37.8%時，其堤面破壞值為最大，並不隨心層孔隙率大小成正向變化。當在不規則波作用下，堤面破壞值受波高、孔隙水壓和堤頂出水高影響，同時在相同示性波高與水深下，包絡超越係數值在大於或小於0.0099時，分別會產生不同的堤面破壞值。本文亦就規則波及不規則波作用情況，分別提出計算堤面破壞值之經驗式，其預測結果尚屬良好。

To discuss the influence of core porosity on stability of rubble mound breakwaters is main purpose of this study. The various porosity of the armor layer is not investigated in this research. For regular waves, the effect of both wave-induced pore pressure and crest freeboard on the damage will be discussed. Under the action of irregular waves, group pressure factor related to the damage will be investigated. For regular waves, it reveals that the breakwater damage values increase as the wave height increased and relative crest freeboard decreased. But the largest value of damage on core porosity is 37.8%, it does not appear a proportional tendency with core porosity. Under irregular wave attacks, the relative wave height, the wave-induced pore pressure, and the crest freeboard will effect on damage. At the same significant wave height and water depth, the envelope exceedance coefficient will produce different values of the breakwaters damage. Under regular waves and irregular waves situation, the predicted formula of damage value are obtained. And the predicted results are good.

中文摘要……………………………………………………… i
英文摘要……………………………………………………… ii
目錄…………………………………………………………… iii
圖目錄………………………………………………………… v
表目錄………………………………………………………… viii
符號說明………………………………………………………… ix
第一章 緒論……………………………………………………… 1
1-1　研究背景及目的…………………………………………… 1
1-2　本文組織…………………………………………………… 3
第二章 文獻回顧………………………………………………… 4
2-1　破壞指標…………………………………………………… 4
2-2　群波因子…………………………………………………… 6
2-3　堤心孔隙率………………………………………………… 7
第三章 分析方法………………………………………………… 8
3-1　破壞分析…………………………………………………… 8
3-2　群波分析相關參數………………………………………… 10
3-2-1　群波因子(GF)………………………………………… 10
3-2-2　群壓因子(PGF)………………………………………… 11
3-2-3　包絡超越係數………………………………………… 12
第四章 試驗配置條件…………………………………………… 14
4-1　試驗佈置…………………………………………………… 14
4-2　試驗條件…………………………………………………… 15
4-3 試驗設備及率定…………………………………………… 16
4-3-1 試驗設備介紹…………………………………………… 16
4-3-2 試驗儀器之率定方法…………………………………… 17
4-4　試驗步驟…………………………………………………… 18
4-5　試驗資料分析……………………………………………… 19
第五章 結果分析與討論………………………………………… 21
5-1　規則波作用下，堤體破壞之探討………………………… 21
5-1-1　水深對堤體穩定之探討………………………………… 21
5-1-2　波高、孔隙水壓及相對堤頂出高對堤體穩定之探討… 21
5-2　不規則波作用下，堤體破壞之探討……………………… 24
5-2-1　群波因子與群壓因子之探討………………………… 24
5-2-2　相對堤頂出水高對堤體穩定之探討………………… 24
5-2-3　波高、孔隙水壓及包絡超越係數對堤體穩定之探討… 25
第六章 結論與建議……………………………………………… 29
6-1　結論 ……………………………………………………………29
6-2　建議 ……………………………………………………………30
參考文獻…………………………………………………………… 31
附圖………………………………………………………………… 34

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