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題名 | 管推進工程之物理模型試驗與數值分析=Analysis of the Pipe-Soil Interaction for Pipejacking |
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作者姓名(中文) | 壽克堅; 張芳維; | 書刊名 | 中國土木水利工程學刊 |
卷期 | 19:1 2007.03[民96.03] |
頁次 | 頁25-34 |
分類號 | 441.13 |
關鍵詞 | 管推進工程; 物理模型試驗; 數值分析; 開挖面穩定; Finite element analysis; Pipejacking; Physical modeling; Face stability; |
語文 | 中文(Chinese) |
中文摘要 | 本研究以物理模型試驗及三維數值方法進行管推進行工程分析研究,試驗方面以「管推進物理模型試驗機」來模擬開挖面支撐壓力過大或不足對地表穩定性的影響。數值分析以有限元素法程式ABAQUS[1]先模擬比對驗證物理模型試驗之行為,後進一步模擬現地破除鏡面常發生之土體坍落行為。本研究主要發現為:第一、模型試驗結果顯示開挖面支撐壓力對地表穩定有決定性的影響:過高會造成地表隆起,不足會造成地表抽坍下陷,維持地表穩定之支撐壓力則介於其間。第二、支撐壓力不足對地表造成抽坍形狀與Leca理論[2]模式比較發現,理論之橢圓坍形長軸與推進方向平行,但模型試驗得長軸與推進方向垂直兩者相差90°。第三、支撐壓力過大之地表隆起形狀與試驗與理論模式相似。 |
英文摘要 | In this study, physical and numerical models were applied to analyze the pipe-soil interaction during pipejacking work. Physical model was applied to simulate cases of pipejacking with excessive driving force and insufficient driving force. After calibrating with the physical modeling results, the finite element software ABAQUS [1] was used to study the behavior, including surface subsidence, failure mechanism, and pipe-soil interaction of pipejacking excavations. The major findings are: (1) the results show that the driving force is critical for the behaviour fo pipe-soil interaction. Surface subsidence is mainly due to the lack of driving force, however, the excessive driving force could cause the unfavorable surface heaving problem. (2) Comparing with the analytical models presented by Leca (1990), it shows that different models consistently predict the surface heaving behaviour but not the shape of surface subsidence. Theoretically, the long axis of the ellipse of surface subsidence is parallel to the driving direction, but the physical modeling shows the long axis is perpendicular to the driving direction. |
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