應用時域反射法監測藤枝林道5.7公里地滑地

Using Time Domain Reflectometry Method for Monitoring 5.7K Tengchih Forest Road Landslide Area

張志瑋(張志瑋)

指導教授 ： 許中立

國立屏東科技大學/工學院/水土保持系所/碩士(2010年)

https://doi.org/10.6346/NPUST.2010.00220

摘要

山坡地發生崩塌、地滑、土石流等坡地災害之因素相當複雜，為降低坡地災害產生而導致的可能損失，因此對於即將或是已發生崩塌與地滑之區域有必要實施監測與調查；其中尤以地滑災害監測為最。
本研究乃選定高雄縣六龜鄉與桃源鄉內之藤枝林道5.7K作為試驗區，並著手應用時域反射法進行藤枝林道5.7K地滑地之定期監測，以及室內模擬試驗，利用現地擷取得的時域反射法波形資料進行數化，將波形資料與室內試驗資料相互比對，加以了解產生地滑之因素與波形變異之情形。結果歸納如下：
1. 未包覆外層絕緣體之同軸電纜其啟動量將小於有包覆外層絕緣體之同軸電纜，由此可知無包覆的同軸電纜其受力時會較快得到反應，而有包覆的同軸電纜經試驗得到其反應較慢。
2. 不同線徑中，同軸電纜線徑較小、柔度較佳之同軸電纜線，其波形反應上將會較柔度差之同軸電纜線快，但整體波形趨勢上大致相同，但柔度較佳之同軸電纜線較易產生斷裂。
3. 於不同剪力帶上做錯動量試驗可發現，剪力帶越寬，同軸電纜線產生波形之啟動量將增加，亦即當剪力帶越寬，則需要更多錯動量才可產生波形。
4. 本研究應用TDR量測藤枝林道5.7K地滑地，經由TDR波形、傾斜管與地層剖面圖之交互比對，可明顯得知地層之滑動面位置所在，且於傾斜管斷裂過後，可持續執行監測的特性，對於爾後使用TDR監測地滑更為確立。

關鍵字

地滑 ； 時域反射法 ； 監測

並列摘要

Slope landslides, debris flow and other slope hazards are very complicated, In order to reduce the loss of slope disasters may lead to. Therefore, the collapse has occurred and the landslide of the region need to implement the monitoring and investigation, among the most important landslide hazard monitoring.
In the present study, Kaohsiung County Tengchih forest road as a pilot area 5.7K, using Time Domain Reflectometry Method for Tengchih Forest Road Landslide Investigation and Monitoring, and indoor simulation experiment, situ capture waveform data obtained from digital, waveform data and laboratory test data with each other than, to understand the factors that produce slippery conditions and waveform variation. the results are summarized as follows.
1. Did not produce coated coaxial cable outer insulation displacement of the initial value will be lower than that of the outer insulation of coaxial cable coating, coated coaxial cable can be that there is no external force will get faster response, coated coaxial cable has been slower response by the test.
2. Different wire diameters, small diameter coaxial cable, good flexibility of coaxial cable, waveform of response flexibility worse than the coaxial cable IV
lines faster, waveform similar to the overall trend, however, good flexibility of coaxial cable lines prone to fracture.
3. Shear test can be found to bring the wrong moment, wider shear zone, coaxial line has an initial value of the waveform will be increased, when the wider shear zone, the need for greater fault momentum can generate waveforms.
4. Application of TDR measurement landslide Tengchih forest road 5.7K, TDR waveform, tilt control and formation of the profile compared with each other, Obvious that the location of slip surface formation, after the tilt tube rupture, Sustainable implementation of the monitoring features, after the use of TDR for monitoring landslide clearer.

並列關鍵字

Landslide ； Time Domain Reflectometry ； Monitoring

參考文獻

陳榮河，洪勇善，1998，「崩塌地整治工法之介紹」，地工技術，第72期，第5-12頁。

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