| 研究生: |
吳天珦 Wu, Tian-Xiang |
|---|---|
| 論文名稱: |
穩態振動法應用於探測基樁長度之實驗研究 The Study of Applying Steady-State Vibration to Explore the Length of Piles |
| 指導教授: |
倪勝火
Ni, Sheng-Huoo |
| 學位類別: |
碩士 Master |
| 系所名稱: |
工學院 - 土木工程學系 Department of Civil Engineering |
| 論文出版年: | 2009 |
| 畢業學年度: | 97 |
| 語文別: | 中文 |
| 論文頁數: | 95 |
| 中文關鍵詞: | 穩態振動法 、非破壞性檢測 、完整性檢測 |
| 外文關鍵詞: | integrity test, steady-state vibration, nondestructive testing |
| 相關次數: | 點閱:120 下載:3 |
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目前運用非破壞檢測技術來評估新建單樁之完整性及施工品質已成為制式規定。其中,有關穩態振動法相關之研究甚少。本研究目的是應用穩態振動法探討、檢測單樁長度之可行性。
本研究利用LabVIEW程式設計軟體,並應用穩態振動基本波傳理論來撰寫資料擷取系統,以便進行訊號的接收與處理。本研究利用現場植入之PC樁為試驗樁,分別進行完整樁及缺陷樁(不同幾何比例缺陷)之檢測。研究方法是利用穩態振動法,將可變換頻率之振動器以及感測器放置於樁頂,量測樁頂在連續時間下之振幅變化,進行基樁完整性檢測。研究結果顯示,量測樁長與實際樁長相符,缺陷越大之基樁越容易判釋其缺陷,但缺陷面積小於10%,則無法由穩態振動法測得。
It has been regulated to use nondestructive testing methods to evaluate the integrity and construction quality of a newly-built single pile. However, there are limited studies of steady-state vibration method (SSVM) used for this purpose. The purpose of this study is to use the steady-state vibration test to evaluate the length of a pile.
This study uses LabVIEW package and the theory of steady-state vibration to code the program for collecting the data. The precast piles were constructed with different size of defects made in advance in this study. Steady-state vibration method, which is one of nondestructive testing methods, was used to perform the pile integrity test. To perform the steady-state vibration test, a shaker with changing frequencies is placed on the pile head. The response of the pile head is monitored by an accelerometer installed on the pile head. The results show that the length obtained from using SSVM is very close to the actual length of the pile. The greater the defect area is, the easier the signal is detected. Defects in the pile are difficult to be detected as the defect area is smaller than 10% of the cross-section area of the pile.
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