透過您的圖書館登入
IP:3.145.88.130
  • 學位論文

以RIDO 程式進行深開挖拆撐分析之方法研究

A study on the analysis method of removed brace process in deep excavation by RIDO program

指導教授 : 何仲明

摘要


本文之目的在於使用FLAC二維數值分析工具及用RIDO一維數值分析工 具,建立U型擋土牆模型,討論採用如何在RIDO中以彈簧模擬結構側牆效應 之行為,建立RIDO近似之分析模型,以提供初步設計之參考。如果在近似 分析中發現有縮減回撐之可能性,則在簡易小型的工程中,可以直接縮減 回撐,複雜的案例中輔以FLAC二維數值分析進行最後細部設計定案,以降 低施工成本。 研究結果顯示在(1) 永久側壁彎曲勁度遠大於臨時擋土壁勁度(2) 永 久結構底版未設置抗浮榫接剛棒,或抗浮榫設計不得提供水平連接之設計 (3) 永久側壁設置時,最多僅於1 層支撐未拆除之條件限制下,U 型擋土牆 結構之支撐拆除過程,RIDO 可以採用單一彈簧合理模擬永久側壁之貢獻及 拆撐行為。

關鍵字

開挖支撐 回撐 支撐拆除 RIDO

並列摘要


In this research, a U-shape retaining wall model is constructed using both FLAC, a two dimensional numerical analysis software, and RIDO, a one dimensional numerical analysis software. In the first stage of analysis, RIDO model is used with a spring to simulate the behavior of a structural side wall. In simple and small projects, if reduction of backward bracing is found in the analysis, we can reduce the bracing as suggested by the analysis. In complicated projects, FLAC model is used for the final design in order to reduce the construction costs. It is found in this research that: (1) Stiffness of permanent side wall is always larger than that of temporally bracing.; (2) When the permanent structural base slab has no anti-floating steel key, or the anti-floating steel key is not allow to provide horizontal connection design; (3) With permanent side wall, and limited to only one layer of bracing, using a single spring to simulate the permanent side wall in RIDO analysis provided a reliable result.

並列關鍵字

Excavation Bracing Dismantle of Bracing RIDO FLAC.

參考文獻


19. 林宏達,2000," 深開挖工程設計與施工實務", 科技圖書。
6. 張吉佐、陳坤泉,1999,"設計參數對深開挖擋土支撐之敏感
2. 冀樹勇、陳錦清、王建智,1999,"RIDO 程式之最佳化土層參
第一科技大學營建工程系碩士論文。
14. Duncan, J.M. and Chang, C.Y.,1970,"Nonlinear Analysis

延伸閱讀