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完整後設資料紀錄
DC 欄位 | 值 | 語言 |
---|---|---|
dc.contributor.advisor | 陳宏宇 | |
dc.contributor.author | Bo Xu | en |
dc.contributor.author | 徐博 | zh_TW |
dc.date.accessioned | 2021-06-08T04:02:38Z | - |
dc.date.copyright | 2018-08-07 | |
dc.date.issued | 2018 | |
dc.date.submitted | 2018-08-06 | |
dc.identifier.citation | 中文文獻
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(2009) Modification and statistical analysis of the Colorado rockfall hazard rating system. Engineering Geology, Vol 104, pp. 55-65 Sass, O. (2005) Temporal variability of rockfall in the Bavarian Alps, Germany. Arctic, Antarctic, and Alpine Research, Vol.37, pp. 564-573. Sasaoka, T., Shimada, H., Sasaki, T. (2008) Study on control of rock fragmentation at limestone quarry. Coal Science& Engineering, Vol.3, pp. 365-368. Stevens, W. (1998) RocFall: a tool for probabilistic analysis, design of remedial measures and prediction of rockfalls. M.A.Sc. Thesis, Department of Civil Engineering, University of Toronto. Ontario, Canada, pp. 105. Varnes, D.J. (1978) Slope movement: types and prcsesses, In landslide, analysis and control, Transportation Research Board, Special Report No. 176. Washington, DC, pp. 11-33 Vittorio, C. (2010) Geological, geomechanical and geostatistical assessment of rockfall hazard in San Quirico Village (Abruzzo, Italy). Geomorphology, Vol.119, pp. 147-161. Wang, Y. (1953) Geology of the Chinkuashih and Chiufen Districts, Taipeihsien, Taiwan. Acta Geological Taiwanica, Vol.5, pp. 47-65. Wei, L.W., Chen, H., Lee, C.F., Huang, W.K. (2014) The mechanism of rockfall disaster: A case study from Badouzih, Keelung, in northern Taiwan. Engineering Geology, Vol.183, pp. 116-126. Wu, S.S. (1985) Rockfall evalution by computer simulation. Transportation Research Record, Transportation Research Board, Washington, DC, Vol.1031, pp. 1-5. Wyllie, D.C. (1980) Toppling of rock slopes: examples of analysis and stabilization. Rock Mech, Vol.13, pp.89-98 | |
dc.identifier.uri | http://tdr.lib.ntu.edu.tw/jspui/handle/123456789/22102 | - |
dc.description.abstract | 本研究以台灣東北部基隆山地區的落石案例為探討的主題,利用現地的地貌表徵,地質材料的分佈,以及不連續面的延伸狀況,來探討當落石向下墜落時,所形成自由落體、彈跳及滾動等三種不同的運動軌跡,以及不同的地質環境特性所可能影響落石的範圍。
從研究的結果中發現,落石的「恢復係數」和「摩擦係數」將會是影響其彈跳及滾動等運動軌跡中,最重要的兩個因子。落石的恢復係數主要是會受到坡面的材料強度、入射角、碰撞速度等三項因素的影響。當落石從3 公尺的高度向下墜落時,如果其入射角分別為30°、45°、60°時,其法線方向的恢復係數可以獲得0.18、0.12、0.10。這個意義告知,落石的法線方向的恢復係數,將會隨著入射角的增大而減小。當入射角固定為90°時,落石的高度分別從位於1公尺、2 公尺、3 公尺處向下墜落,其恢復係數分別為0.41、0.35、0.31,由此可見,落石的碰撞速度越大,恢復係數越小。落石的塊體大小相對於斜坡上的堆積石塊大小,也會對落石的運動方式造成影響,當落石的大小尺寸比坡底已經堆積的石塊體積更小時,其運動軌跡易受斜坡起伏的影響,這種影響的類型主要是以彈跳方式的運動軌跡為主。當落石的大小尺寸比坡底已經堆積的石塊體積更大時,則不容易受到坡面起伏的影響,將會持續保持滾動的狀態運動,此時落石的運動主要是會受到摩擦係數的影響,碰撞恢復係數的影響較小。當落石體積增大到一定程度時,則將不會再影響其碰撞恢復係數。研究使用RocFall 軟體,對AA`、BB`、CC`三處剖面進行模擬分析,記錄其自由落體、彈跳及滾動等三種不同的運動軌跡,及落石在運動過程中的能量,這些資料可以作為防治落石災害之重要參考依據。 | zh_TW |
dc.description.abstract | This study focued on the case of rockfall in the Keelung Mountain Area in the northeastern part of Taiwan. To explore the different trajectories and range including free fall, bouncing and rolling when the rocks fall down, this research tried to analyze the local geomorphological characteristics, distribution of geological materials, and the extension of the discontinuities.
In the results, 'coefficient of restitution ' and 'coefficient of friction' are the most important factors which affect the movement trajectory of bouncing and rolling. The coefficient of restitution is mainly affected by the three factors, such as the strength of slope surface’s material, incident angle, and collision speed. In the situation when falling rocks descend from 2m height, and setting the incident angles as 30°, 45°and 60°, we observed the coefficient of normal restitution as 0.18, 0.12, and 0.10. These results showed that, the coefficient of normal restitution of the rockfall inversely decreased with the incident angle. When fixing the incident angle at 90°, the coefficients of restitution were observed as 0.41, 0.35, and 0.31 when the rockfall from 1 m, 2 m, 3 m. This research found that the coefficient of restitution inversely decreased with the collision speed of rockfall. The size of the falling rocks which was related to the size of the block on the slope, also affected the path of the rockfall based on the bouncing movement. When the size of the rock was smaller than the size of the block at the bottom of the slope, the trajectories were influenced by undulation. When the size of the rock was larger than deposited one, the rock was hard to be affected by slope fluctuation, and continue to keep scrolling. At this situation, the movement of the rockfall was mainly affected by the coefficient of friction rather than the coefficient of restitution’s impact. The simulation is carried out using the Rocscience Rocfall program, which depicts the path and energy of rockfall, these data can be used as important reference basis of prevention of rockfall hazards. | en |
dc.description.provenance | Made available in DSpace on 2021-06-08T04:02:38Z (GMT). No. of bitstreams: 1 ntu-107-R05224216-1.pdf: 7548162 bytes, checksum: 2c9ae6d93e100d09cd37f4eda6aa709e (MD5) Previous issue date: 2018 | en |
dc.description.tableofcontents | 致謝.....................................................................................................................Ⅰ
摘要.....................................................................................................................Ⅱ Abstract.....................................................................................................................Ⅲ 目錄.....................................................................................................................Ⅳ 圖目錄.....................................................................................................................Ⅶ 表目錄.....................................................................................................................Ⅸ 第一章 緒論..................................................................................................................1 1.1 前言.....................................................................................................................1 1.2 研究動機及目的.................................................................................................1 1.3 地理位置及交通狀況.........................................................................................2 第二章 文獻回顧..........................................................................................................5 2.1 形成條件及誘發因素.........................................................................................5 2.2 落石運動特性.....................................................................................................7 2.3 落石之參數選取.................................................................................................9 2.4 落石軌跡之數值模擬.......................................................................................11 第三章 研究區域概況................................................................................................13 3.1 地質地貌概況...................................................................................................13 3.2 氣候及降雨概況...............................................................................................16 第四章 研究方法........................................................................................................19 4.1 野外調查...........................................................................................................19 4.1.1 地質材料分佈調查 ....................................................................................19 4.1.2 地貌調查 ....................................................................................................19 4.1.3 施密特錘試驗 ............................................................................................21 4.1.4 樣品採集 ....................................................................................................21 4.2 室內試驗...........................................................................................................22 4.2.1 點荷重試驗 ................................................................................................22 4.2.2 消散耐久試驗 ............................................................................................24 4.3 落石行為分析...................................................................................................25 4.3.1 岩塊墜落反彈試驗 ....................................................................................25 4.3.2 落石行為影響因素分析 ............................................................................30 4.3.3 落石運動軌跡分析 ....................................................................................35 4.4 落石模擬分析...................................................................................................39 第五章 調查結果........................................................................................................41 5.1 野外地質調查結果...........................................................................................41 5.1.1 剖面 AA` ....................................................................................................41 5.1.2 剖面 BB`.....................................................................................................45 5.1.3 剖面 CC`.....................................................................................................48 5.1.4 地質特性 ....................................................................................................49 5.1.5 不連續面分佈 ............................................................................................51 5.2 抗壓強度試驗結果...........................................................................................53 5.2.1 點荷重試驗結果 ........................................................................................53 5.2.2 施密特鎚試驗結果 ....................................................................................54 5.3 抗風化強度試驗結果.......................................................................................55 5.4 岩塊墜落反彈試驗結果...................................................................................56 5.4.1 落石大小與恢復係數對比 ........................................................................64 5.4.2 高度與恢復係數對比 ................................................................................65 5.4.3 入射角度與恢復係數對比 ........................................................................65 第六章 落石模擬分析結果........................................................................................71 6.1 剖面 AA`...........................................................................................................71 6.2 剖面 BB ` ..........................................................................................................76 6.3 剖面 CC` ...........................................................................................................81 第七章 討論................................................................................................................85 第八章 結論................................................................................................................89 參考文獻......................................................................................................................91 中文文獻..................................................................................................................91 英文文獻..................................................................................................................91 附錄一 施密特錘換算單壓強度表............................................................................95 附錄二 點荷重試驗方法............................................................................................96 附錄三 消散耐久試驗方法........................................................................................98 附錄四 Rocfall 軟體..................................................................................................99 附錄五 岩塊墜落反彈試驗結果..............................................................................101 | |
dc.language.iso | zh-TW | |
dc.title | 台灣東北部基隆山地區落石災害之研究 | zh_TW |
dc.title | The study of Rockfall in Keelung Mountain Area of Northeastern Taiwan | en |
dc.type | Thesis | |
dc.date.schoolyear | 106-2 | |
dc.description.degree | 碩士 | |
dc.contributor.oralexamcommittee | 胡植慶,紀宗吉,王瑞斌 | |
dc.subject.keyword | 落石,恢復係數,摩擦係數,自由落體,彈跳及滾動, | zh_TW |
dc.subject.keyword | Rockfall,Coefficient of Restitution,Coefficient of Friction,Free Fall, Bouncing , Rolling, | en |
dc.relation.page | 138 | |
dc.identifier.doi | 10.6342/NTU201802392 | |
dc.rights.note | 未授權 | |
dc.date.accepted | 2018-08-06 | |
dc.contributor.author-college | 理學院 | zh_TW |
dc.contributor.author-dept | 地質科學研究所 | zh_TW |
顯示於系所單位: | 地質科學系 |
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