https://scholars.lib.ntu.edu.tw/handle/123456789/37481
標題: | 地震造成新山崩地質環境特性之研究─地震後新山崩之工程地質特性(Ⅲ) | 其他標題: | The Engineering Geological Characteristics of New Landslides Caused by Earthquake | 作者: | 陳宏宇 | 關鍵字: | 古水流方向;顆粒圓度;接觸型態;堆疊關係;黏土礦物;paleo-current;roundness;packing pattern;contact pattern;mineral content | 公開日期: | 2003 | 出版社: | 臺北市:國立臺灣大學地質科學系暨研究所 | 摘要: | 由九九峰區域1400 顆卵礫石排列方向 調查發現,本區域80%以上卵礫石長軸傾 向介於120 O ~140 O 之間,此結果顯示,九 九峰地區原來為屬於一個沉積盆地,古水 流以東南-西北向流經此處,並沉積大量 卵礫石,經過長時間的壓密作用以及後來 造山運動抬升作用下,變成現在所看到的九九峰。另外,從九份二山地區之地質材料的 顆粒圓度、顆粒推疊方式以及黏土礦物與 力學強度間之關係發現,岩石材料組成顆 粒的圓度為0.58;為屬於圓狀顆粒的範圍, 堆疊密度為77.81%,堆疊相鄰關係則為 69.23%,礦物顆粒則以不接觸的型態最為 常見,高達41.19 %。在27 個岩石樣品的 黏土礦物成分分析結果顯示,依萊石含量 最多,佔63.42 %,其次依序為高嶺石、綠 泥石以及膨潤石,含量分別為15.81 %、13.69 %、7.09 %。上述在九份二山的調查結果發現,顆 粒圓度與岩石基本摩擦角之間呈現負相關 的關係,但相關性並不明顯,堆疊密度及 堆疊相鄰方式與基本摩擦角兩者則無任何 關係存在。直線型及嵌合型的接觸型態與 基本摩擦角呈現正相關的趨勢,且相關性 較高,分別為r = 0.5 及r = 0.68 。依萊石的 相對含量與基本摩擦角間呈現明顯的正相 關,膨潤石的相對含量則與基本摩擦角呈 現負相關趨勢(r=-0.53 ),至於綠泥石以及 高嶺石與基本摩擦角無對應關係,相關係數均在0.14 以下。 Based on the field investigation, the long axis of 1,400 gravels samples show that more than 80% gravels distributed their orientation ranging from 120 0 ~140 0 . The rose diagrame results also indicated that the paleo-current displayed the flow direction from southeast to northwest. The massive deposition of gravels had been consolidated, transported, orogened, and formed the 99 peaks of study area. Various investigated methods including roundness, packing pattern, contact pattern, and clay mineral was executed in Juo-Feng-Err-Shan. The results exhibited the roundness is 0.58, and classified as round particles. The packing density was 77.18% and packing proximity was 69.23%. Around 41.19% were presented non-contacting to each other. The results show that Illite was dominant, and occupation was 63.42%. The Kaolinite, Chlorite and Smectite were 15.81%, 13.69% and 7.09% respectively. The results also show that the roundness of particle increases, the friction angle will decrease in Juo-Feng-Err-Shan. The linear relationship is not very clear in each other. The packing pattern and friction angle do not have any relation as well. Furthermore, when Illite composition increase in the rock, friction angle will increase. When smectite mineral increase, friction angle will decrease. |
URI: | http://ntur.lib.ntu.edu.tw//handle/246246/11814 | 其他識別: | 912116M002019 | Rights: | 國立臺灣大學地質科學系暨研究所 |
顯示於: | 地質科學系 |
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912116M002019.pdf | 102.74 kB | Adobe PDF | 檢視/開啟 |
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