|
碩士論文公告區 |
||
| 年度： | 94 | |
| 姓名： | 吳俊彥(Jiun-Yan Wu) | |
| 論文題目(中)： | 以阻抗縱剖分析法檢測基樁完整性之可行性評估 | |
| 論文題目(英)： | Evaluation of Pile Integrity Using Impedance Log Method | |
| 摘要(中)： | ||
| 本研究利用數值模擬分析與模型基樁檢測,探討利用阻抗縱剖分析法檢測單一及多重缺陷基樁內所含缺陷大小及其漫延長度之可行性。首先利用數值模擬分析探討敲擊時間、kernel與3D效應對檢測訊號之影響,其次再對模型基樁進行檢測,比較音波回音(SE)法、脈波反應(IR)法與阻抗縱剖分析(IL)法對模型基樁內預埋缺陷之檢測能力。 整理研究結果得到以下結論：利用SE與IR法檢測基樁之完整性,因其訊號易受材料之不均質性及3D效應所影響,故對缺陷之判定需要相當之經驗。而阻抗縱剖分析法之訊號判讀則較直接,因此利用阻抗縱剖分析法來檢測基樁之斷面變化應該具有相當高之發展潛力。 |
||
| 摘要(英)： | ||
| The objective of this thesis is to investigate the capabilities of the Impedance Log (IL) method in profiling the geometry of a pile along its length. The main idea of this method is to introduce a transient stress wave into a pile and then utilize the reflected signals to obtain the impedance profile of the pile. The impedance profile can then be used to recover the equivalence cross-sectional area (or material property) along the length of the pile. Any anomaly, which results in changes in impedance, would be detected by this method. To gain an insight into the Impedance Log nondestructive evaluation technique, this thesis starts with reviewing its theoretical background. A numerical program was developed to convert the time domain velocity waveform recorded at pile head into the impedance profile of the pile. Five model piles with plan defects of weak zones and neck were constructed and tested . Result of these tests show the interpretation of signals using the proposed method is more straightforward than the other traditional methods such as the Sonic Echo method or the Impulse Response method. It is concluded that the Impedance Log method is a tool with high potential for evaluating the integrity of pile. |
||
| 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-0222106-080800 | |