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研究生:李瑞雅
研究生(外文):Lee, Ruey-Yea
論文名稱:震源位置與坡地條件對被動式表面波震測分析之影響
論文名稱(外文):Effect of Source Location and Slope Conditions on Passive Surface Wave Method
指導教授:林志平林志平引用關係
指導教授(外文):Lin, Chih-Ping
口試委員:馮正一
口試委員(外文):Feng, Zheng-Yi
口試日期:2018-10-05
學位類別:碩士
校院名稱:國立交通大學
系所名稱:土木工程系所
學門:工程學門
學類:土木工程學類
論文種類:學術論文
論文出版年:2018
畢業學年度:107
語文別:中文
論文頁數:76
中文關鍵詞:被動式多頻道表面波分析法空間自相關分析法震源位置傾斜地層坡地條件
外文關鍵詞:MAPSSPACSource locationInclined layerSlope conditions
相關次數:
  • 被引用被引用:2
  • 點閱點閱:252
  • 評分評分:
  • 下載下載:14
  • 收藏至我的研究室書目清單書目收藏:1
山區複合性災害必須考慮土讓剪力波速與崩積層厚度,使用非破壞性被動式表面波震測法,可以經濟且大範圍的量測地層概況。當應用被動式表面波震測法於山區時,會因震源位置與坡地地形條件而產生與基本假設不符之處,有進行影響探討之必要。本研究利用三維數值模型搭配波譜元素法,模擬表面波在非均勻震源於水平地層、均勻震源於傾斜地層與山坡地形中的傳遞行為,並探討其對分析結果的影響,並尋求可能降低影響或避免影響之方案。
研究成果顯示,在有主要來源方向之被動震源的情況,對空間自相關分析法(SPAC)影響小,但對被動式多頻道表面波分析法(MAPS)有頻散曲線與理論解偏移的現象,建議利用主動式表面波震測法獲得某頻率段的相位速度以作為MAPS修正之參考。均勻震源於傾斜地層會造成非均勻震源,對SPAC方法影響小,對MAPS方法一樣有頻散曲線偏移的現象,且依然可利用主動式表面波震測法進行修正。中尺度山坡中,坡度與震源位置皆會影響分析結果,坡度越陡或震源與測線在山坡不同側時,頻散曲線的判釋較困難,但被動式概念-interferometry可提升表面波頻散分析在中尺度山坡的適用性。
To prevent the disaster in mountain, we must consider the shear wave velocity of soil and the thickness of the collapse layer. Using the non-destructive passive surface wave seismic method, the formation profile can be measured economically and widely. It is different from basic assumptions, when the passive surface wave seismic method is applied to the mountainous area, so it is necessary to discuss the effect of the source location and the slope conditions. In this study, three-dimensional numerical models were utilized. The transfer behavior of surface wave is simulated by spectral element method in a horizontal stratum by non-uniform sources, in sloping stratum by uniform sources and in hilly topography, and to explore its impact on the analysis results and further reduce the impact or avoid the impact.
The research results show that in the case of passive source with main source direction, the impact on Spatial autocorrelation method(SPAC) is small, but there is offset on dispersion curve between Multichannel analysis of passive surface(MAPS) and theoretical solution. It is suggested to use active surface wave seismic method to obtain phase velocity of a certain frequency segment. Used as a reference for MAPS correction. The uniform source of the inclined layer will cause non-uniform sources, the impact on the SPAC method is not so obvious. And the dispersion curve by MAPS mothed got offset, and it can still be corrected by the active surface wave seismic method. In mesoscale slopes, the slope and source location will affect the analysis results. The steeper the slope or the source and the stations are on different sides of the hill, the interpretation of the dispersion curve is more difficult, but the passive concept-interferometry can improve the applicability of surface wave dispersion analysis in mesoscale hillsides.
中文摘要 i
Abstract iii
致謝 v
目錄 vii
圖目錄 x
表目錄 xiv
第一章 緒論 1
1.1研究動機 1
1.2研究目的 3
1.3內容架構 3
第二章 文獻回顧 4
2.1震波的種類與其基本理論 4
2.2表面波震測法 6
2.2.1表面波基本傳波原理 7
2.2.2表面波量測方法 9
2.3被動式震測(微地動)基本原理 10
2.3.1多頻道式被動表面波震測法 11
2.3.2空間自相關分析法 14
2.3.3被動式多頻道表面波分析法 17
2.4表面波震測受震源變化之影響 20
2.5表面波震測受地形變化之影響 22
2.6 小結與研究課題 25
第三章 研究方法 27
3.1研究流程 27
3.2三維震波模擬方法與選用軟體 28
3.2.1波譜元素法 28
3.2.2三維震波模擬軟體SPECFEM3D架構說明 39
3.2.3震波模擬之參數設定 42
3.3 模型設計和測線位置說明 44
3.3.1 Case1水平層狀與非均勻震源 46
3.3.2 Case2傾斜地層與均勻震源 47
3.3.3 Case3山坡地形與河流震源 48
3.3.3 Case4山坡地形與單一震源 50
第四章 結果與討論 53
4.1 非均勻震源對被動式表面波頻散分析的影響 53
4.1.1 MAPS 能量集中影像圖 56
4.1.2 修正角θ的決定 58
4.1.3 速度剖面的決定 59
4.2 傾斜地層對被動式表面波頻散分析的影響 61
4.3 被動式對山坡地形中河流震源的適用性 63
4.4 山坡地形對表面波頻散分析的影響 66
4.4.1 被動式概念(interferometry)使用於山坡地形的影響 67
4.5 兩種被動式方法分析上的優缺點 69
第五章 結論與建議 71
5.1 結論 71
5.2建議 72
參考文獻 74
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