| 姓名 | 劉國守(Kuo-Shou Liu) | 電子郵件信箱 | E-mail 資料不公開 | |
| 畢業系所 | 營建工程系碩士班(Department and Graduate Institute of Constrction Engineering) | |||
| 畢業學位 | 碩士(Master) | 畢業時期 | 92學年第2學期 | |
| 論文名稱(中) | 液化路段路堤路基加勁配合垂直排水帶設計之研究 | |||
| 論文名稱(英) | Study on the Subgrade Reinforcement and Vertical Drainage Design of Highway Embankments in Liquefaction Area | |||
| 檔案 |
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。 |
論文使用權限 | 校內外均一年後公開 | |
| 論文語文/頁數 | 中文/155 | |||
| 摘要(中) | 921集集大地震造成中二高龍井以南路段霧峰、南投等地嚴重之液化情形。路堤構造物在地震時，其基礎底下之土壤因液化現象，發生承載力之急遽喪失、整體滑動、液化後沉陷量、側向移坍、液化噴砂等問題。因此，本研究希望研擬出適合於液化路段路堤之路基加勁+垂直排水帶之設計方法；並提供公路單位及其他實務設計者之初步參考。 首先，進行文獻回顧，修正及應用Koerner(1994)等極限平衡法，並配合中二高里程233k+925∼234k+850之名間收費站路堤實際液化案例，建立液化路段路堤災害現況模擬分析及路基加勁+垂直排水帶之設計方法，並經FLAC 2D 數值程式加以驗證，希望於解決路堤液化設計問題能有另一思考方向。 本研究分析結果顯示：(1)液化路段現況路堤，進行Koerner(1994)修正方法及FLAC 2D數值分析軟體於實際路堤液化案例，驗證結果顯示大致上與路堤液化現況相吻合。(2)利用路基加勁+垂直排水帶於改善路堤之液化破壞，經利用Koerner(1994)修正方法及FLAC 2D數值分析軟體，驗證結果顯示對整體滑動幫助不大，但可有效地抑制加勁後液化後沉陷量、側向移坍及液化噴砂之液化災害。(3)FLAC數值分析方 法之分析結果，大致與本研究Koerner(1994)修正方法分析結果相同； FLAC分析方法可進一步的提供不同剖面、不同時點之監測值。 | |||
| 摘要(英) | The Chi-Chi
earthquake resulted in serious liquefaction damage in the south section
of the second freeway of Wu-Feng and Na-Ton areas. During the
earthquake, the foundation of embankment construction induced soil
liquefaction causing liquefaction problems such as bearing capacity,
settlement, global slide, lateral spreading, sand boils and so on.
Therefore, this study hopes to finger out the subgrade reinforcement and
vertical drainage design which are suitable for freeway embankments
in liquefaction areas and offers the preliminary references to the
freeway bureau and other practice projects. This study proceeds document retrospect and uses the limit equilibrium methods of Koerner’s method (1994) to operate the Ming-Jian’s embankment of liquefaction case at the second freeway ( 233Km - 234Km). In addition, the study also simulates the calamity of the present situation and uses the subgrade reinforcement and vertical drainage design of highway embankments in liquefaction areas. Moreover, the study will be proved by FLAC numerical analysis and it is hoped that there will be another way of thinking to solve the problem of embankment liquefaction design. The results of research analysis shows: (1) For the present situation of liquefaction area of freeway embankment, both Koerner (1994) revised method and FLAC numerical analysis have been carried out to analyze the embankment of liquefaction case and it has been proved that the result is identical to the present situation of embankment. (2) Utilizing the subgrade reinforcement and vertical drainage to improve the effectiveness of embankment of liquefaction damage, the Koerner revised the method and FLAC numerical analysis were carried out again to prove the result. However, the result didn’t give much help on global slide, but it can effectively improve liquefaction such as settlement of reinforcement, lateral spreading, and sand boils. (3) The result from FLAC numerical is almost the same as the analysis outcome from Koerner (1994) revised the method. Moreover, the FLAC numerical analysis offers further information on the monitor with different section and location. | |||
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