| 姓名 | 謝旻勳(Min-Hsun Hsieh) | 電子郵件信箱 | E-mail 資料不公開 | |
| 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 | 92學年第2學期 | |
| 論文名稱(中) | 獨立基樁非破壞檢測訊號之研究 | |||
| 論文名稱(英) | A Study on the Signal Analysis from Integrity Testing on Individual Piles | |||
| 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/101 | |||
| 摘要(中) | 在現今許多地小人多的國家其運輸系統要完善，高架設施可說是無可避免的選擇。而支持這些設施之基樁，可能在建造時因為施工不良而有缺陷；或因其周圍土壤受到侵蝕而受損，因而導致基礎及上部結構的損壞。因此，如何發展一套方法去評估這些埋在深處基樁之現況是非常值得探討和研究。 本研究利用數值模擬與模型基樁之檢測，借由改變衝擊錘以及接收器擺設位置，探討如何改善音波回音法及脈波反應法中之檢測訊號之判讀，期能找出最佳基樁非破壞檢測方式，以作為基樁現況評估之參考。 整理研究結果得到以下結論：因模型基樁之尺寸限制，質量大的衝擊錘與速度規，不適合在本實驗使用。當接收器擺設位置距離敲擊源10㎝處時，可因減少表面波的影響，使缺陷訊號較明顯而容易判定。而當基樁周圍為土壤所環繞則會造成檢測訊號的衰減，因而增加訊號判讀之困難度。若以速度時間歷時曲線為主，力學導納曲線為輔，則還是能判別出基樁缺陷位置。 | |||
| 摘要(英) | Abstract The objective of this study is to compare the capability of several stress wave nondestructive testing (NDT) techniques, such as sonic echo (SE) and impulse response (IR) methods, in detecting various types of defects in piles. Numerical study and model piles tests were conducted to investigate the effects of hammers and receivers on the signal from NDT tests. Distances between the impact hammer and receiver were also varied to explore the 3-dimensional effects on the response of the NDT signal. Results of this study indicate that the SE method can detect minor defects in the model piles. However, it is better to place the receiver 10-cm away from the impact hammer to minimize the effects of Raleigh wave reflected from the circumference of the pile. On the other hand, the IR method is less influenced by the location of the receiver but it can not detect the thin weak layer in the model pile. It is also found that after the model piles have been buried, damping effects of surrounding soil reduce the intensity of signal thus increase the difficulty in detecting the defects. | |||
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