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研究生:游步上
論文名稱:隧道交叉段之三維變形量測與參數分析
論文名稱(外文):Three Dimensional Deformation Measurements and Parameter Analyses of Tunnel Intersection
指導教授:陳堯中陳堯中引用關係
學位類別:博士
校院名稱:國立臺灣科技大學
系所名稱:營建工程系
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:1999
畢業學年度:87
語文別:中文
論文頁數:244
中文關鍵詞:三維變形
外文關鍵詞:Dimensional Deformation
相關次數:
  • 被引用被引用:9
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This research studies the three-dimensional mechanical behavior of tunnel intersection by using numerical analysis and in-situ measurements. The intersection of Pongshan Tunnel of Taipei-Ilan Expressway is the subject of the research. Three-dimensional optical deformation measurement system was used to monitor the deformation behavior of intersection excavation. FLAC-3D was used to simulate the bypass excavation by assuming homogeneous rock mass condition. The changes of deformation and lining stress due to bypass excavation were investigated. The appropriateness of numerical simulation was examined by comparing with in-situ measurements. The parametric studies were performed to investigate their influences.
Complex three-dimensional behavior of tunnel intersection can be truly reflected by 3-D deformation measurement. The wall of main tunnel on the bypass side deforms most during the bypass excavation. The deformation curve of the wall shows an influencing trough shape. The adequacy of 3-D measurement was identified by the results of convergence measurement. Comparisons of numerical analysis and field measurement show that they have the same tendency concerning the locations and directions of the maximum deformations.
Results of parametric studies show that for elastic analysis, different stress fields and lateral stress coefficients will change the magnitudes of displacements and lining stresses, but have no influences on the mechanisms. For elastoplastic analysis, different lateral stress coefficients will change the mechanisms of displacements and lining stresses according to the rock mass conditions (such as cover depth and rock mass strength). For elastoplastic analysis, increasing deformation modulus will decrease the deformations and lining stresses before bypass excavation, but the lining stresses of the main tunnel walls on the bypass side will not change much after bypass excavation.
According to the results of numerical analysis, the simplified tunnel intersection mechanism as proposed by this study can explain the mechanisms of tunnel intersection. The mechanisms of tunnel intersection are influenced by both the releases of the lateral constraint due to bypass excavation and the loading changes due to the plastic zone redistribution.
封面
摘要
ABSTRACT
誌謝
目錄
表目錄
圖目錄
第一章 緒論
1.1 研究動機
1.2 研究目的
1.3 研究方法
1.4
第二章 文獻回顧
2.1 隧道交叉段力學行為之影響因素
2.2 隧道交叉段力學行為
第三章 現地監測結果與討論
3.1 前言
3.2 監測計畫
3.3 三維變形量測精度評估
3.4 東行線 5 號人行聯絡橫坑開挖量測結果與討論
3.5 東行線 8 號人行聯絡橫坑開挖量測結果應論
3.6 西行線 8 號人行聯絡橫坑開挖量測結果與討論
3.7 綜合評估
第四章 數值分析方法
4.1 GLAC3D程式述
4.2 FLAC3D的基本理論架構
4.3 FLAC3D之運算程序
4.4 FLAC3D的組合律模式
4.5 FLAC3D基本術語
4.6 FJAC3D分析流程
第五章 模式驗證
5.1 前言
5.2 數值模擬
5.3 模式驗證分析結果與討論
5.4 綜合評估
第六章 參數分析
6.1 數值模擬
6.2 隧道交叉段的力學機制
6.3 參數分析結果與討論
6.4 聯絡橫坑開挖之影響範圍
第七章 結論與建議
7.1 結論
7.2 建議
參考文獻
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