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研究生:陳廷原
研究生(外文):Ting-Yuan Chen
論文名稱:深層重力變形邊坡的微地動特性探討
論文名稱(外文):Characteristics of Microtremors Surrounding Slope with Deep-seated Gravitational Deformation
指導教授:王泰典
指導教授(外文):Tai-Tien Wang
口試委員:郭安妮翁孟嘉林銘郎黃燦輝
口試日期:2016-07-21
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:資源工程研究所
學門:工程學門
學類:材料工程學類
論文種類:學術論文
畢業學年度:104
語文別:中文
中文關鍵詞:HVSR、HHT、深層重力變形邊坡
外文關鍵詞:HVSR、HHT、deep-seated gravitational deformation
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深層重力變形邊坡潛移範圍大,短時期內的變形量值卻不明顯以致調查不易;然此類邊坡一旦運動加速,極可能引發遽變式山崩,造成重大災難。如何調查重力變形邊坡潛在滑動體的存在及其範圍等,為邊坡災害防治的關鍵項目。本研究以我國東南部某經詳細調查及多年監測確認的深層重力變形邊坡為研究案例,量測其微地動特性並分析不同頻率的振幅及能量,以提供調查判釋潛在滑動體邊界的參考。
本研究案例邊坡有一公路隧道穿越,根據確認的滑動邊界於滑動體與隧道內外不同位置,進行一系列微地動測量作業,採用快速傅立葉轉換 (FFT)分析微地動不同方向頻譜,比較單站及雙站水平垂直頻譜比(HVSR)的放大頻段,並使用希爾伯特黃轉換(HHT)獲取頻譜中不同頻段的能量比例。
研究結果顯示,案例邊坡滑動體邊界外,單站HVSR放大頻段明顯較於滑動體內部高約在7Hz左右,而滑動體內部HVSR放大頻段易隨測點位置不同產生變化,下腹部處與滑動體交界處相對穩定大致坐落在6Hz以下,上邊坡處最為紊亂不易集中於某一頻段。而雙站HVSR放大頻段也大致與單站HVSR結果相同。垂直向頻譜各頻段能量比例不論滑動體內外皆相似,2Hz以下比例約20%、2~3Hz約占40%、5Hz以上約40%,而水平向頻譜於滑動體邊界內部,低頻段所占比例明顯上升,2Hz以下大多可達至25%部分甚至可達40%,高頻段所處頻率也較滑動體外有提高的現象。由HVSR與各頻段能量組成比例結果交叉比較可得知,滑動體內部隧道內量測及解析所得類似於地表的結果,但於滑動體外,隧道內部的結果與地表略有差異。
Deep-seated gravitational deformation range is huge, the magnitude of deformation of the short term is not obvious that the investigation is not easy; however such acceleration slope, once in motion, is likely to lead to rapid change in the formula landslides, causing a major disaster. How to investigate the existence and scope of deep-seated gravitational deformation are the key projects of slope disaster prevention. In this study in Southeast Taiwan after a detailed investigation and d deep-seated gravitational deformation as a case study, measurement and analysis of its micro-earthquake characteristic amplitude and energy of different frequencies to provide a survey of potential sliding Interpretable boundary of reference for many years to monitor confirmed .
The case study of slope has a road tunnel crossing, according to the confirmation slip boundary at different locations inside and outside the tunnel and the sliding body, a series of microtremors measuring operation, using Fast Fourier transform (FFT) spectrum analysis of microtremors in different directions, and compare with single station horizontal and vertical spectral ratio (HVSR);dual horizontal spectral ratio amplification band and using Hilbert-Huang Transform (HHT) to obtain the proportion of the energy spectrum in different bands.
The results show, the outer boundary slope slip case, single station HVSR amplification band was significantly higher than inside sliding body height of about 7Hz, sliding inside HVSR amplification band easily change with the case different. At the lower abdomen with the slide body junction is relatively stable in the following 6Hz substantially located on the slope is most difficult to focus on a particular band. The dual station HVSR amplification band is about the same results with a single station HVSR.
Vertical to the spectral energy ratio of each band regardless of the slide both inside and are similar, 2Hz the following ratio of about 20%, 2 to 3Hz accounts for about 40%, 5Hz above about 40%, while the level in the spectrum within the boundaries of the sliding body, the proportion of low frequency increased significantly, 2Hz or less up to 25% of the most even up to 40% higher than the frequency band in which the slide has been improved. HVSR with the composition ratio of the energy bands cross comparison results can be learned, and the resulting analytical test slide inside the tunnel amount similar to the results of the surface, but the sliding body, inside the tunnel and the surface slightly different results
摘 要 I
ABSTRACT III
致謝 V
目錄 VI
表目錄 VIII
圖目錄 IX
第一章 緒論 1
1.1 研究背景與目的 1
1.2 研究方法與流程 1
1.3 研究架構與主要內容 2
第二章 文獻回顧 4
2.1 深層重力變形 4
2.1.1 深層重力變形地表產狀與變形特徵 4
2.1.2 調查方法 8
2.2 深層重力變形微地動量測技術應用 10
2.2.1 微地動量測技術之背景 10
2.2.2頻譜比法 11
2.2.3 微地動量測之應用 12
第三章 案例邊坡及微地動資料收集 23
3.1 案例邊坡 23
3.1.1 歷年航照判釋與現地查核 24
3.1.2 既有邊坡監測資料及結果 25
3.1.3 既有隧道監測及結果 25
3.2 微地動測量 27
3.2.1 儀器設備 28
3.2.2 現地作業流程 28
3.2.3 測站分佈 29
3.2.4 資料處理流程 29
第四章 微地動資料處理結果與討論 56
4.1 不同測點的微地動特性 58
4.1.1 FFT頻譜 58
4.1.2 頻譜比 59
4.1.3 能量比 61
4.1.4 HHT圖 64
4.2 案例邊坡崩塌地內外量測結果 65
4.2.1 滑動體地表外 66
4.2.2 滑動體地表內 67
4.2.3 公路沿線 69
4.3 案例邊坡隧道內外量測結果 70
4.4 討論 72
4.4.1 HVSR與經驗模態分解(EMD)處理目的差異 72
4.4.2 案例邊坡主要頻段 73
第五章 結論與建議 74
5.1 結論 74
5.2 建議 75
參考文獻 76
附錄A 80
附錄 Q&A 231
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