|
碩士論文公告區 |
||
| 年度： | 96 | |
| 姓名： | 賴建琮(Jian-Cong Lai) | |
| 論文題目(中)： | 應用表面波譜法調查地盤灌漿品質範圍及尺寸之研究 | |
| 論文題目(英)： | Evaluating the Quality and Dimensions of Soil Grouting by the SASW Method | |
| 摘要(中)： | ||
| 本研究將利用表面波譜法(SASW)來調查地盤灌漿時灌漿體的範圍與品質。 本研究以有限差分為基礎之數值分析軟體FLAC3D程式來進行表面波譜法之數值模擬，探討影響參數對頻散曲線之影响，其中包括敲擊延時(1000μs、500μs、300μs)以及灌漿體材料性質(混凝土與攪拌土兩種情形)。由FLAC所得不同點位的速度歷時透過快速傅立葉轉換(FFT)後，得到頻率域訊號，再經過頻譜分析計算其相位角，得到其頻散曲線，由不同間距的頻散曲線集合成複合頻散曲線，再繪製成一“代表性”頻散曲線，以評估灌漿體品質及範圍。本研究也從時頻圖來驗證灌漿體之存在跡象。 由本研究結果顯示灌漿體的長度、寬度與深度可由複合頻散曲線、“代表性”頻散曲線求出，而其品質可由頻散曲線所得之波速來判斷。 |
||
| 摘要(英)： | ||
| This study used numerical method to investigate dimensions and quality of soil grouting body by SASW method. In this study, a numerical analysis software FLAC3D, based on the finite difference method, was used to perform the analysis. The influence parameters on dispersion curve including during of loading, soil grouting body material property(concrete and mixed soil ). The numerical analysis was performed by adding a transient loading in source point and the displacement on various distance from source point was calculated by FLAC. Time domain signal is transformed to the frequency domain signal by FFT. Dispersion curve is obtained from phase angle that is calculated by the frequency spectrum analysis. A compound dispersion curve is obtained from the dispersion curves intervale, and the representative dispersion curve is used to evaluate dimensions and quality of soil grouting body. At the same time, the Gabor spectrogram is drawn to identify the existence of soil grouting body in this study. From this results show that the length, wide and depth of soil grouting body can be found from the compound dispersion curve and the representative dispersion curve, as well as the quality of grouting is identified by shear wave by the dispersion curves. |
||
| 檔案： | 沒有相關檔案 | |
| 相關連結： | http://ethesys.lib.cyut.edu.tw/ETD-db/ETD-search-c/view_etd?URN=etd-0828108-182801 | |