Applicability Study of A Slope Motion Monitor Using Video Motion Detection Technology

This study primarily investigates the applicability of video motion detection (VMD) technology for detecting side-slope movement. This technology involves using an economical high-resolution camera to instantly record activities, such as side-slope sliding, toppling, and movement. Concurrently, sum of absolute differences (SAD) analysis was combined with the threshold value to assess the side-slope surface movement. The physical modeling detection results showed that the VMD technology instantly detects side-slope tension crack development, rock deformation, and the location of collapsing surfaces, thereby effectively improving the effectiveness of alarms before and during disasters. Actual landslide case analysis shows that dip-slope movement is detected through gradual expansion of initial slanted rectangular red blocks and instant magnification following the block expansion on the ground level. The monitoring mechanism of VDM technology for detecting the speed and movement of debris flow can be used as a reference in disaster prevention and evacuations of people living in downstream areas. Furthermore, this study generalizes the limitations of VMD technology. These generalizations can be used as a reference for future slope surface movement monitoring and related studies.本文主要探討影像感測技術於邊坡運動監測之適用性，藉由低成本、高解析度攝影機即時記錄邊坡滑動、傾倒及流動等過程，並以絕對差值分析法搭配門檻值評估邊坡地表運動過程。物理模型感測結果顯示，採用影像感測技術可即時偵測邊坡張裂隙發展、岩體變形與地表瞬間崩壞之區位，有效提升災前及災中預警之成效。實際山崩案例分析發現，順向坡滑動之感測特徵由初始傾斜長條型紅色區塊逐漸增加範圍，最終塊體於地面擴散後將造成紅色區塊瞬間擴大。而影像感測技術對於土石流速度及流動狀況之監測，亦可作為下游保全對象防災疏散之參考。此外，本研究亦初步歸納影像感測技術之應用限制，期能作為未來邊坡地表變動監測與相關研究之參考

物理模型試驗應用於順向坡板岩變形特性之研究

本文主要探討臺灣板岩順向坡變形特性，藉由現場調查、地形分析與物理模型試驗說明板岩不同條件下之重力變形特性，並推估板岩變形過程與潛在崩壞機制。結果顯示，坡趾侵蝕透空與降雨入滲機制為板岩變形之關鍵，其將造成板岩材料強度弱化加速發生變形。此外，板岩變形初始發生於崖頂張力區，坡體將沿著高角度葉理滑移，並於侵蝕弱化帶附近形成剪切破壞或複合型破壞。而變形範圍內具有相當多葉理張開之現象，其將有助於地表水與地下水滲入，促使板岩變形區加速變形至崩壞。This paper focuses on characterizing the deformation of consequent slate slopes in Taiwan. Onsite surveys, terrain analysis, and a physical model test are used to describe the characteristics of gravity-driven deformation under various conditions and identify the process of slate deformation as well as potential failure mechanisms. Slate deformation is shown to begin in the tension zone at cliff tops, wherein the slope body slips along the highly inclined foliation, contributing to shear failure or composite failure near the eroded zone of weakness. The phenomenon of foliation opening is widespread within the area of deformation, enabling surface water and groundwater to seep in, thereby accelerating deformation and failure in the slate deformation zone

Studies of electron irradiation induced deep level defects in p-type 6H-SIC

published_or_final_versionPhysicsMasterMaster of Philosoph

考量落石引致最大衝擊力於明隧道頂板設計之研究

This study estimates the maximum impact force for a rock-shed slab in a rockfall. A discrete element program is calibrated using small-scale physical experiments and is then used to model the movement for a large scale rock-fall and to measure the impact forces. The results from the small-scale experiments show that the maximum impact forces are significantly affected by the mass of the rock-fall, the height from which the rock falls and the falling process. The full-scale numerical modeling for a field case confirms these experimental results and demonstrates the effect of rock-fall modes and the contact stiffness between the rock and the rock-shed. This study provides guidelines for the design of rock-shed structures where there are large rock-fall problems.本文主要利用數值模擬評估大規模落石之最大衝擊力，藉此作為國內明隧道頂板結構設計之參考。而數值模擬主要採用分離元素法，經由物理模型試驗進行比對驗證後，進行大規模落石運動過程模擬與衝擊力量測。物理模型試驗結果顯示，落石引致之最大衝擊力主要由落石量、落距與崩落過程等因素影響最為顯著。由全尺度數值模擬結果顯示，其除可滿足物理模型之落石衝擊行為外，對於崩落型式、落石材料與明隧道頂板間之接觸勁度亦可量化出其影響特性，故對於明隧道頂板設計或陡坡危岩處理考量上，應可最為後續研究與工程防護設計之參考

數值模擬與危害評估應用於潛在崩塌影響範圍之劃設

This study focused on the hazard zonation of potential deep-seated catastrophic landslides at the Chenyulan Creek watershed through numerical simulation and a hazard assessment method. Using the results of landform interpretation and geological surveys, we constructed a discrete element method to simulate the process of landslide movement and determine landslide hazard zonation. And then, we integrated landslide probability, kinetic energy, debris flow velocity, and debris front thickness to evaluate potential landslide hazard zoning in the study area. Finally, several landslide cases were simulated and the results can serve as a reference for disaster prevention, mapping and zoning of areas susceptible to geological hazards, and associated mitigation project planning.本研究主要探討臺灣陳友蘭溪五處研究區潛在大規模崩塌之影響範圍，經由潛在大規模崩塌區位地貌判釋與現場查核結果，分別以分離元素法建構五處研究區崩塌運移數值模型，以探討崩塌運移過程與致災影響範圍。本研究另於五處研究區數值模型假設兩種崩塌深度，並整合崩塌重現期、動能、邊坡滑動速度、土石流堆積厚度等模擬結果，進行各潛研究區影響範圍之危害度評估，作為後續災前整備、山崩地質敏感區劃設與治理工程規劃之參考