碩士 / 國立成功大學 / 水利及海洋工程學系碩博士班 / 93 / 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.
| Identifer | oai:union.ndltd.org:TW/093NCKU5083031 |
| Date | January 2005 |
| Creators | Chien-Chih Chen, 陳建志 |
| Contributors | Sheng-Wen Twu, Huang-Hui Huang, 凃盛文, 黃煌輝 |
| Source Sets | National Digital Library of Theses and Dissertations in Taiwan |
| Language | zh-TW |
| Detected Language | English |
| Type | 學位論文 ; thesis |
| Format | 51 |
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