台灣沉積岩及變質岩地區之山崩幾何特徵研究

機構典藏 > College of Engineering > Graduate Institute & Department of Civil Engineering > Thesis > Item 987654321/114622

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Title:	台灣沉積岩及變質岩地區之山崩幾何特徵研究
Other Titles:	Study on landslide geometric characteristics of sedimentary rocks and metamorphic rocks in Taiwan
Authors:	謝嘉銘;Sie, Jia-ming
Contributors:	淡江大學土木工程學系碩士班楊長義;Yang, Zon-Yee
Keywords:	Collapse;collapse area;collapse shape;stratigraphic lithology;地層岩性;坍方;坍方形狀;坍方面積
Date:	2017
Issue Date:	2018-08-03 14:58:34 (UTC+8)
Abstract:	山崩的發生常受到地震或豪雨因素，山崩幾何特徵是以地形及地質條件等綜合結果。本研究利用台灣河系特特徵在相同流域下相同誘發條件，左岸與右岸分別為不同地質條件，藉由長短軸比比較變質岩及沉積岩在相同誘發條件下山崩之差異，進一步找出地質條件在山崩幾何形狀影響程度，並建立山崩地質條件與滑動深度之關係。其中利用坍方之航照判釋圖，經由ImageJ影像分析軟體計算，得到每一個坍方外觀形狀之面積及長短軸比值，比較不同岩性結果得致下列主要結論：(1)變質岩較沉積岩具有較多的坍方幾何形式，判斷變質岩區發生坍方時，坍方處坡體強度下降程度並不一致使得坍方幾何現象多變且坍方區域較小。(2)在高屏溪流域與陳有蘭溪流域，沉積岩的坍方幾何特徵表現類似，並且沉積岩區坍方大部分落在旋轉滑動型(rotational slide)坍方型態，坍方寬度介於100m~200m之間，長寬比則大多介於1~3之間，多數小於4。變質岩區的坍方，則顯示大多落在岩屑流(debris flow)型態，且坍方形狀長寬比大多介於1~6之間、但可高至10以上，形狀常常較狹長。地區之坍方幾何特性分佈差異性，並依USGS分類以判斷其坍方類型屬性。結果得致下列主要結論：(1)變質岩較沉積岩具有較多的坍方幾何形式，判斷變質岩區發生坍方時，坍方處坡體強度下降程度並不一致使得坍方幾何現象多變且坍方區域較小。(2)在高屏溪流域與陳有蘭溪流域，沉積岩的坍方幾何特徵表現類似，並且沉積岩區坍方大部分落在旋轉滑動型(rotational slide)坍方型態，坍方寬度介於100m~200m之間，長寬比則大多介於1~3之間，多數小於4。變質岩區的坍方，則顯示大多落在岩屑流(debris flow)型態，且坍方形狀長寬比大多介於1~6之間、但可高至10以上，形狀常常較狹長。 The occurrence of landslides is often affected by earthquakes or heavy rain factors, landslides geometric characteristics of terrain and geological conditions and other comprehensive results. In this study, the characteristics of the Taiwan River are characterized by the same catchment and the same landslide time, and the two banks are divided into different geological conditions. The relationship between the geologic shape of the landslide is established by comparing the difference of the landslide between the metamorphic rocks and the sedimentary rocks under the same induced conditions. The difference of the geometric characteristics of the landslide in different lithologic areas is compared and classified according to the USGS to determine the collapse type attribute. The following are the main results： (1) Comparison of metamorphic rocks and sedimentary rocks found that metamorphic rocks have more collapse of the geometric form, Judging the collapse of metamorphic rocks, the slope of the intensity reduction is not consistent with the collapse of the geometric phenomenon of change. (2) The collapse geometries of the sedimentary rocks in the two reservoir waters are similar to those of the Gaoping River and Chen Youlan Creek, and most of the sedimentary rock collapse mechanism is expressed by the rotational slide collapse type.
Appears in Collections:	[Graduate Institute & Department of Civil Engineering] Thesis

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