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研究生: 邱士銘
Shih-Ming Chiu
論文名稱: 冰凍工法之凍脹模型比較分析
Comparative analysis of frost heave model with artificial ground freezing
指導教授: 張瑞宏
Jui-Hung Chang
口試委員:
學位類別: 碩士
Master
系所名稱: 工學院 - 土木工程學系
Department of Civil Engineering
畢業學年度: 98
語文別: 中文
論文頁數: 96
中文關鍵詞: 地盤冰凍工法土壤凍脹水分遷徙孔隙率函數有限元素法潛盾隧道
外文關鍵詞: tunnel, ground freezing method, frost heave, water migration, porosity rate function, finite element method
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  • 本論文針對用於輔助潛盾隧道開挖之冰凍工法,考慮土壤冰凍後產生水分遷徙現象造成土壤之凍脹行為;研究中將使用孔隙率函數、及入流通量兩種凍脹模型進行數值模擬。分析之案例為Michalowski 及 Ming Zhu 所提出之試驗與中國南京San-Zhang隧道,以有限元素軟體ABAQUS進行數值模擬分析。依照試驗狀況建立有限元素數值模型,透過溫度邊界條件的設定,並根據凍脹模型設定土層之熱學性質參數、凍脹分析相關參數。模擬之結果與文獻試驗資料比較,以探討模擬之成效。


    The main objective of this thesis is to study water migration and frost heave induced by ground freezing method applied to tunnel construction. The porosity rate function method and the water inflow content method are used in the numerical simulation. Two cases are simulated, included Michalowski & Ming Zhu test, and San-Zhang subway in Nanjing of China. The numerical analysis is performed by using ABAQUS, and considers temperature boundary conditions, thermal property parameter of soil layer, frost heave model parameter. The applicability of the numerical results is denouemented by comparing with the on-site observation of the field measurement.

    目錄IV 表目錄VII 圖目錄VIII 第一章緒論1 1.1前言1 1.2研究動機與目的2 1.3研究方法2 1.4論文架構2 第二章文獻回顧4 2.1冰凍工法相關事項4 2.1.1冰凍工法之冷凍方法5 2.1.2冰凍工法常用之形式6 2.2土壤凍脹之成因8 2.3土壤的基本熱性質10 2.4土壤冰凍試驗之相關文獻14 2.5土壤冰凍數值模擬分析相關文獻18 第三章熱力學分析理論與數值模擬方法19 3.1熱力學分析理論19 3.1.1熱傳遞機制19 3.1.2熱傳導分析理論20 3.1.3熱彈性材料之材料組成律22 3.2ABAQUS中熱傳導限元素法分析理論25 3.3熱應變分析方法29 第四章土壤之凍脹模型31 4.1土壤之凍脹模型31 4.1.1土壤產生凍脹之過程31 4.1.2未凍水含量之預測32 4.1.3水分遷徙之凍脹模型36 4.2凍土之單軸壓縮強度45 第五章凍脹模擬與分析49 5.1文獻案例驗證-Michalowski 及 Ming Zhu 試驗49 5.1.1現地狀況與施作情形49 5.1.2熱傳導分析51 5.1.3依序偶合熱應變分析52 5.2案例-中國南京San-Zhang隧道55 5.2.1現地狀況與施作情形55 5.2.2模型尺寸與網格設置57 5.2.3熱傳導分析60 5.2.4依序偶合熱應變分析65 第六章模擬結果與討論70 6.1文獻案例驗證分析結果70 6.1.1熱傳導分析結果70 6.1.2孔隙率函數法分析凍脹結果71 6.2南京隧道案例分析結果73 6.2.1熱傳導分析結果73 6.2.2入流通量法分析凍脹結果75 6.2.3孔隙率函數法分析凍脹結果75 6.2.4入流通量法與孔隙率函數法結果比較76 第七章結論與建議78 7.1結論78 7.2建議79 參考文獻81

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