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題名 | Cam-Clay彈塑性模式應用於深開挖分析之參數研究=Parametric Studies of Cam-Clay Plasticity Model in Deep Excavation Analysis |
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作 者 | 唐雨耕; 歐章煜; | 書刊名 | 力學 |
卷期 | 15:1 1999.06[民88.06] |
頁次 | 頁1-12 |
分類號 | 441.13 |
關鍵詞 | 深開挖; 有限元素法; 彈塑性模式; Deep excavation; Finite element; Elasto-plastic model; |
語文 | 中文(Chinese) |
中文摘要 | 本文旨在探討如何有效率地利用深開挖工程現地量測的壁體變形決定有限元素法 深開挖分析所需的修正 Cam-clay 模式參數。由於實驗技術的限制以及深開挖工程施工前的 設計假設,使得深開挖工程中實際約土壤行為和原先的假設有一些差異,所以現地量測資料 常用來配合反推分折以決定土壤參數,然而當未知土壤參數增多時,這種方法變得非常沒有 效率, 本研究首先利用現地量測深開挖工程的壁體變形建立一有系統的程序來決定 Cam-clay 模式參數, 亦即可以利用現階段開挖的璧體變形預測後續階段開挖的壁體變形。 本研究所發展的分析方法,經由二個假設開挖案例驗證具有高望的穩定性與收斂性,最後並 將此分析方法應用於一實際的深開挖工程案例。 |
英文摘要 | The objective of this study is to investigate the parameters of the Cam-clay model in the finite element analysis based on the measured wall deflection in deep excavation. Due to the limited technique of laboratory tests and assumption of excavation design, the actual soil behavior may be different from those used in the finite element analysis. Therefore, the measured wall deflection is frequently used to back analyze the in-situ soil parameters. The method becomes inefficient with the increase of the numbers of soil parameters. This study first establishes a systematic procedure to determine the Cam-clay model parameters based on the measured wall deflection is studied. Based on analysis results of two hypothetical excavations and an actual excavation case, an analysis procedure is proposed to predict the wall deflection at the next excavation stage using that at the current stage. The safety of the excavation of the excavation can thus be preserved. |
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