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| 題 名 | 彰濱風場液化潛能初步評估=Preliminary Assessment of Liquefaction Potential for Chang-Bin Wind Farm |
|---|---|
| 作 者 | 蔡潔忞; 郭玉樹; 許惠婷; 陳景文; | 書刊名 | 地工技術 |
| 卷 期 | 142 2014.12[民103.12] |
| 頁 次 | 頁69-78 |
| 分類號 | 448.165 |
| 關鍵詞 | 彰濱風場; 海床液化; 簡易經驗法; Chang-Bin wind farm; Seabed liquefaction; Simplified method; |
| 語 文 | 中文(Chinese) |
| 中文摘要 | 我國於2011年宣示全力推廣「千架海陸風力機」計畫,風力發電之總裝置發電容量預計於2030年將達4200MW。然而陸域風場已趨飽和,經濟部遂於2012年公告「風力發電離岸系統示範獎勵辦法」,帶動離岸風場之開發;其中,選定風能優良之彰濱風場優先進行開發。我國地理環境特殊,地震及颱風等災害之發生次數頻繁,且彰濱風場海床下方20公尺以內之主要組成土壤為軟弱砂土;地震及颱風對海床引致之極端剪應力,可能造成海床土壤液化,影響風力發電機運轉時之穩定性。為評估地震與颱風引致彰濱風場海床液化之潛能,本研究選用Seed(1971)法和Nataraja與Gill(1983)提出之抗液化強度比建議式,並利用彰濱風場之現地土壤鑽探資料,分別評估地震和颱風引致之海床液化潛能。由本研究結果顯示,以475年回歸期之設計地震進行液化潛能評估,則彰濱風場有部分區域屬極高液化風險;若以50年重現期距之極端波浪進行液化潛能評估,其結果顯示彰濱風場介於極低至低液化風險。彰濱風場於極端地震之條件下,彰濱風場之海床有液化風險。未來進行彰濱風場風機支承基礎結構設計時,除了應思考海床土壤液化防制對策,亦建議針對離岸風機基礎於液化後海床之穩定性進行評估。 |
| 英文摘要 | Due to the global warming problem, Taiwan government planned to reach 4200 MW total installed capacity of wind energy in 2030. Chang-Bin wind farm which has well wind energy resources is chosen to be the pilot wind farm. This study assesses both earthquake-induced and wave-induced liquefaction potential of Chang-Bin wind farm by using simplified method. The result shows that the earthquake-induced liquefaction risk is between high and very high in Chang-Bin wind farm if the design earthquake refers to 475-year return period earthquake. Wave-induced liquefaction risk in Chang-Bin wind farm is between low and very low evaluated by using 50-year return period extreme wave. Due to the extreme external condition such as earthquakes and extreme waves, the liquefaction potential in Chang-Bin wind farm is very high. It’s necessary to consider liquefaction problem while designing the foundation of offshore wind turbines. |
本系統中英文摘要資訊取自各篇刊載內容。