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系統識別號 U0026-0812200911322971
論文名稱(中文) 土石流地聲傳播特性之實驗研究
論文名稱(英文) Experimental Study of the Propagation of Ground Vibration Produced by Debris Flows
校院名稱 成功大學
系所名稱(中) 水利及海洋工程學系專班
系所名稱(英) Department of Hydraulics & Ocean Engineering (on the job class)
學年度 93
學期 2
出版年 94
研究生(中文) 涂俊宏
研究生(英文) Jiunn-Horng Twu
電子信箱 wca07033@ms1.gsn.gov.tw
學號 N8791115
學位類別 碩士
語文別 中文
論文頁數 56頁
口試委員 指導教授-黃清哲
口試委員-董志明
口試委員-趙儒民
中文關鍵字 土石流示範觀測站  頻率  土石地聲  地聲探測器  衰減特性  傳遞速率 
英文關鍵字 geophones  underground sound  decay rate  propagation speed  debris flow observation station  frequency 
學科別分類
中文摘要   本研究以地聲探測器(Geophone)量測土石碰撞時所產生之地聲,實驗所得地聲之時域訊號利用快速傅立葉轉換(FFT)及Gabor Transform轉換為頻域訊號及時間–頻率訊號,以探討土石地聲之頻率、傳遞速率及隨距離衰減特性。本研究之實驗分為兩部份,第一部份是於實驗室內量測石頭以自由落體方式撞擊水槽內之土石材料所產生之地聲。此部份之實驗主要是探討地聲探測器傾斜不同角度時所測得地聲訊號之差異。這些資訊可提供土石流觀測示範站中地聲探測器安裝及接收訊號之參考。第二部份的實驗係在農委會水土保持局所建置之土石流示範觀測站—南投縣信義鄉豐丘村豐丘野溪土石流觀測站及神木村愛玉子溪土石流觀測站,進行現場土石碰撞及滾動地聲觀測試驗,以了解實際河床中土石地聲之頻率、傳遞速率及隨距離衰減特性。實驗結果顯示石頭撞擊豐丘野溪河床或在河床上滾動所產生的地聲頻率在10到150 Hz之間,而地聲之傳遞速率約為833.3m/s~1000 m/s。不同重量石頭撞擊愛玉子溪河床所產生地聲頻率亦介於10到150 Hz之間,而地聲傳遞速率約為333.3m/s~400 m/s。
英文摘要  The purpose of this study is to investigate the propagation of ground vibration generated by debris flows by using geophones. The main characteristics of ground vibrations were discussed in terms of the frequencies, the propagation speed and the decay rate. The time-domain signals of ground vibrations were transformed into the frequency domain by using the Fast Fourier Transform and into the Time-Frequency domain by using the Gabor transform. The experiments were divided into two parts. The first part consisted of measuring the ground vibration caused by a free-falling rock hitting a bed of gravel in a tank. Effects of the inclination angle of the geophone on the recorded signals were tested. In the second part, the same instrumentation as in the first part was applied to measure the ground vibration produced by a free-falling rock hitting a riverbed. The field experiments were performed at the Fong-Qiu Debris Flow Observation Station and Ai-Yue-Zi River Debris Flow Observation Station, both locate at Hsin-Yi Hsiang, Nan-Tou County. The field experimental data from Fong-Qiu show that the frequency of the ground vibration is in the range of 10-150 Hz and the propagation speed is about 833.3m/s~1000 m/s. The ground vibration data from Ai-Yue-Zi River occupy the same frequency range as those from Fong-Qiu but with a much lower propagation speed is about 333.3m/s~400 m/s.
論文目次 中文摘要………………………………………………………………………. I
英文摘要……………………………………………………………………….II
誌謝……………………………………………………………………………III
目錄……………………………………………………………………………IV
表目錄...………………………………………………………………………VI
圖目錄.……………………………………………………………………….VII
符號說明..…………………………………………………………………….XI
第一章 緒論...…………………………………………………………………1
1-1 前言……………………………………………………………………1
1-2 前人研究………………………………………………………………1
1-3 研究目的………………………………………………………………2
第二章 相關理論及分析方法…..…………………………………………….4
2-1 土石流特性………….…..…………………………………………….4
2-2 地聲傳播特性……….…..…………………………………………….5
2-3 Gabor Transform……….…..……………………………………………7
第三章實驗設備及佈置……….…..…………………………………………10
3-1 地聲探測器之量測原理……….…..…………………………………10
3-2 實驗佈置與流程……….…..…………………………………………13
第四章 實驗結果與討論………….……………….……………….……………..15
4-1 地聲探測器傾斜的影響.……………….……………….………………...15
4-2 豐丘野溪觀測站現場土石地聲之量測結果...……..................…...…..23
4-2-1 豐丘野溪之背景 ……………….……………….……………….…23
4-2-2 現場土石地聲量測之實驗內容 ………………….………………24
4-2-3 現場土石地聲量測之實驗分析結果.……………….………….…26
4-2-4 石頭滾動實驗(使用一個地聲探測器)………….………….…….33
4-2-5 地聲傳遞速率及其隨距離之衰減…………..................………...37
4-3 神木村愛玉子溪現場土石地聲之量測結果…………….……………..42
4-3-1 愛玉子溪之背景資料………….……………….……………….….42
4-3-2 現場土石地聲量測之實驗內容…..................……….………... 43
4-3-3 現場土石地聲量測之實驗分析結果................……….………..45
4-4 比較與討論..……….………………………..................……….………51
第五章 結論與建議………….………………………………..................………52
5-1 結論….………….………………………………..................……….……52
5-2 建議….………….………………………………..................……….……52
參考文獻….…………….. ………….……………….……………….……………..54
自述……….…………….. ………….……………….……………….……………..57
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