https://scholars.lib.ntu.edu.tw/handle/123456789/169468
標題: | 地工合成材加勁護岸之穩定性研究(2/3) | 作者: | 陳榮河 | 關鍵字: | 地工合成材;護岸;過濾;雙向循環水流;geosynthetics;revetment;filtration;bi-directional cyclic flow | 公開日期: | 2005 | 出版社: | 臺北市:國立臺灣大學土木工程學系暨研究所 | 摘要: | 近年來由於生態意識日益受到重視, 因此河川護岸工程之設計除了考慮構造物 的安全性之外,對現地生態環境的考量也 是相當重要的一環,而地工合成材加勁護 岸除了具有生態環境營造上的優點之外, 亦具有頗佳之長期穩定性。然對於加勁護 岸因水位變化,造成水流進出(承受雙向循 環水流),或長期浸泡於水中,相關設計參 數之研究,目前仍付之闕如,故有待進一步研究。 本計畫主要以試驗的方式,分別於國 內及法國的實驗室中以可模擬實際地工合 成材加勁護岸承受雙向循環水流的設備進 行一系列的試驗,國內試驗部份係採用第 一年自行研發之雙向循環水流試驗儀,探 討地工合成材加勁護岸於不同覆土載重作 用下(即不同深度處)之沖蝕行為,並將試驗 所得之初步成果配合法國之大型水槽試 驗,藉此獲知其受力及變形機制,並建立 適宜之分析模式及設計準則。 本報告為第二年之研究成果,主要研 究內容為訂定雙向水流試驗準則,並提出初步試驗結論。 Scouring has been a severe problem of the riverbanks in Taiwan. Building high embankments is often adopted as a viable measure for this purpose. These concrete structures, however, may cause considerable impacts on the environmental and are not reliable under long-term scouring. On the other hand, reinforced revetments using geosynthetics not only easily fit well with the environment but also have better long-term stability compared with conventional concrete structures. Yet, the design parameters for chronically submerged reinforced slopes subjecting to bi-directional cyclic flows are not known clearly. In this project, a series of laboratory tests are performed in Taiwan and France, separately. In Taiwan, the apparatus that was developed in the first year of this project is used to study the erosion mechanism of a soil /non-woven system subjected to bi-directional cyclic flows. In France, a large-scale flume test is used to conduct experiment on a simulated model of reinforced revetment. From the results of the tests, appropriate analytical model and design criteria will be developed accordingly. This report is the result of the second year study. It proposes the experiment standard for bi-directional flow test and presents preliminary results of the bi-directional flow test and the flume test. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/2887 | 其他識別: | 932211E002009 | Rights: | 國立臺灣大學土木工程學系暨研究所 |
顯示於: | 土木工程學系 |
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932211E002009.pdf | 543.4 kB | Adobe PDF | 檢視/開啟 |
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