Please use this identifier to cite or link to this item: http://hdl.handle.net/11455/15555
標題: 應用時域反射技術監測集水井位移量之方法研究
Applying Time Domain Reflectometry for Displacement Monitoring within Drainage Well
作者: 劉仲祥
Liou, Jhong-Siang
關鍵字: 時域反射技術
TDR
伸縮計
Extension
出版社: 土木工程學系所
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摘要: 由於梨山地滑地B11監測站旁邊的W2集水井位處在滑動土體上方,於2006年六月期間TDR(時域反射技術,Time Domain Reflectometry)量測出其在地下三公尺附近產生滑動導致集水井結構體發生變形。故本研究藉此期望建立一個集水井的量測,已確保W2集水井在往後的期間能夠確保其變形發生的時間與產生的變位。 以往伸縮計可量測的範圍為佈線在量測物上的線段總長變位量,但是對於需要求得量測物部分區段移動量的方法,可能需要再架設一台或是更多的設備。若由同軸電纜線為感測器的話,則可量測整段測線或是各分段的移動量。 時域反射技術(TDR)主要是利用電磁波的折射與反射現象來找出傳輸路徑中不連續的位置以及特性阻抗;而架設電纜線本身即為一具連續性、可多點量測的感應器。故應用此一特性發展出可做為量測移動位移量的一套裝置。 本研究的目的在於將應用的時域反射技術(TDR)變形量測的方式加以改良,成為量測待測物產生位移量的一種裝置。由室內試驗確定其準確性及提高穩定性,進一步求其對於實際最小位移量的範圍做測試。最後,由實驗數據結果與分析驗證其可行性。
W2 Drainage well is located at sliding mass, near to B11 station in Lishan landslide. TDR is used to survey in June at 2006. We find the W2 drainage well has been deformed below ground about three meters. So we expected to build the survey of the drainage well, and the result assured the degree of the deformation and the time. In the past, the ranges of extension position transducers survey the total displacements of buildings. If we want to get the displacements of some zones of buildings, we must set up more and more extension position transducers. So we use TDR cables as monitoring sensor which can survey the total displacements or some zones of displacements TDR is used to find discontinuous positions in the communication path. TDR cable is served as a continuous, and multiple points monitoring sensor, not limited by the installing direction neither encroached by the subterranean material. The purpose of the study is to apply improving the method of TDR for displacement monitoring, and device can survey the displacements. The study assures accuracy and stability of the device, and furthermore to test the minimization of the displacement of the device. Finally, we analyze the data of experimentation to prove the practicability of the device.
URI: http://hdl.handle.net/11455/15555
其他識別: U0005-1508200717270500
文章連結: http://www.airitilibrary.com/Publication/alDetailedMesh1?DocID=U0005-1508200717270500
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