| 姓名 | 林筱萍(Hsiao-Ping Lin) | 電子郵件信箱 | s9311611@cyut.edu.tw | |
| 畢業系所 | 營建工程系碩士班(Department and Graduate Institute of Constrction Engineering) | |||
| 畢業學位 | 碩士(Master) | 畢業時期 | 94學年第2學期 | |
| 論文名稱(中) | 單樁垂直承載力在多層土壤的簡化分析之探討-以台北某工地為例 | |||
| 論文名稱(英) | Simplified Analysis of Vertical Capacity of Single Pile in Multiple Layer Stratum Using a Construction Case in Taipei Basin | |||
| 檔案 |
請遵守中華民國著作權法之相關規定，切勿任意重製、散佈、改作、轉貼、播送，以免觸法。 |
論文使用權限 | 校內外完全公開 | |
| 論文語文/頁數 | 中文/126 | |||
| 摘要(中) | 本研究使用有限差分FLAC程式進行單樁垂直承載力之敏感度分析，並利用實數型基因演算法、現地試樁資料及FLAC有限差分程式進行反算分析，以求現地土層最佳參數值，再以此參數值推估其載重-沉陷預測曲線。然後將現地土層簡化成單一土層，配合極限載重-沉陷預測曲線與基因演算法，推估簡化土層最佳參數值，再討論現地土層與簡化土層最佳參數值之關係式，並比較此兩者以承載力公式所得之結果。 由本研究分析結果顯示參數敏感度分析時土壤凝聚力、摩擦角參數值之改變對其樁頂變位有較大之影響；礫石層的摩擦角建議取ψ≧35°較為合適，然而土壤及礫石層剪力模數參數值之改變對其樁頂變位量之影響不大。使用基因演算法推估現地土層參數值，可得到與現地監測值相接近的曲線，且模擬所得參數值尚能有效反應現地土層之力學性質。在建立現地多層土壤與簡化後單一土層兩者力學參數之關係方面，本研究說明厚度加權平均方式較適用。 | |||
| 摘要(英) | The study applied
the FLAC code to analyze the parameter sensitinity on vertical bearing
capacity of single pile in Taipei basin. The real-parameter genetic
algorithm was performed to decide the optimal material parameter values
for soil stratum. Using these parameter values, the numerical simulating
load-settlement curve will be obtained by the FLAC. Then, the multiple
layer stratum will be simplified to the single layer one and its optimal
material parpmeter values were calculated by the genetic algorithm
method with the numerical simulating load-settlement curve. Finally, the
relationship of the optimal material parameter values between the
multiple layer stratum and the single layer one was analyzed. Results of the parameter sensitinity study show that soil cohesion and friction angle are the most important parameter of settlement when the pile was loaded. The optimal friction angle is greater than 35° in gravelly formation. The shear modulus of soil or gravel is insignificant parameter on pile displacement. The numerical simulating load-settlement curve with the optimal material parameter values by using the genetic algorithm method and FLAC code can simulate the pile loading test rdsults effectively. A suitable simplified analysis is proposed, the mean materal properties are obtained by using weighted average of soil layer thickness. | |||
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| 指導教授 |
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