2009-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/708944摘要：台灣山區落石災害層出不窮，每逢地震事件或颱風豪雨季節常引致山區落石災害，而落石災害程度因量體差異而有所區別，尤以大量岩塊同時運動所導致之災害程度最為嚴重，諸如大甲溪、紅菜坪、達邦三號橋及&#63940;泉溪堰&#63852;湖等大規模落石災害事件。 展望當前研究，前人多以集塊質量法進行落石運動軌跡之模擬，並依據能量與其回歸期決定危險等級，進一步作為落石危害範圍區劃定之依據，卻往往忽略了數個岩塊同時運動產生碰撞、破碎造成最終落石危害範圍之影響。 有鑑於此，本計畫擬以三年為期，主要研究重點在於落石堆積危害分析，應用分離元素法之顆粒力學模擬軟體(PFC3D 3.0)配合室內物理模型，針對不同量體岩塊、地形、坡面材料等條件下進行其岩坡落石堆積之力學行為模擬，藉此建立力學模式與不同規模落石量之危害範圍。另結合遙感探測技術(Remote Sensing)，運用航空照片取得不同時間點之現地落石災害資訊，以利於實際落石災害區之地形、地貌之辨識，加以配合現地定位測量方法提高遙測影像糾正與定位之精度，藉此將相關力學模擬方法應用於實際落石災害區，爾後依其落石能量分佈建立不同地形、地質、落石量之落石危害範圍劃定及其危害度分級模式，以期成為當前土地利用、相關技術規範及後續研究之參考指標。 <br> Abstract: Rockfall disasters often occurred frequently in Taiwan mountain areas especially in the earthquake events or the season of typhoon and raining. These disaster extents were different between the Rockfall volume especially many fragments of Rockfall movement at the same time will occur serious disaster such as Ta-Chia River, Hungtsaiping, Tapangu No.3 of bridge, landslide block lake of Long-Quan River and so on. Reviewing the present literatures, they applied the Lumped Mass Approach (LMA) to simulate movement trajectory of Rockfall and according as energy, occur period to determined the hazard level, further to differentiate Rockfall hazard area. However, they neglected that the interaction behavior of Rockfall will cause fragments collision and damage to influence deposits of Rockfall. Whereas, this project will formulate three years that mainly focus on deposits of rockfall hazard analysis. We will apply Discrete Element Method (DEM) program (PFC3D 3.0) to collocate physical model experiment that mainly aimed at different volume of rocks, topography, materials of slope to simulate mechanical of deposits of Rockfall. Herewith the mechanical model and deposits area of Rockfall are established. Besides, we will combine Remote Sensing (RS) technology to apply the different periods of aerial photograph that can obtain Rockfall disasters information such as landforms. Furthermore, RS technology will collocate GPS, RTK measurement for improve precision and accuracy of images. Herewith the mechanical model can apply in actual disasters scene. Subsequently, this study will establish Rockfall hazard graded model depend on different of topography, geologic, Rockfall volume and so on. Finally, we hope the research can provide reference for land use management, technical code and follow research.落石分離元素法室內物理模型力學模式遙感探測技術RockfallDEMphysical model experimentmechanical modelRS