2020-08-012024-05-18https://scholars.lib.ntu.edu.tw/handle/123456789/707853摘要：根據近年台灣發生於道路邊坡的災害調查結果，顯示岩坡破壞之崩滑機制，並非只侷限於層面或板劈理面形成的單一滑動面，潛在破壞面可能由多組節理弱面同時構成，即岩坡工程問題須以節理岩坡作為研究對象；此外，除了豪雨或地震等自然外力因素之外，另一主要促崩因素為原先非延續的節理弱面受擾動連通後，使裂隙水能夠沿裂隙網絡流動，節理岩坡內地下水位變化的情況下，導致之岩體強度急遽下降至破壞。綜合上述，本子計畫旨於在分析地下水引致節理岩坡變形破壞、影響評估以及相關監測整治技術的研究。透過創新測繪技術來提節理岩坡弱面特性調查的範圍、精度、程度與效率，釐清節理岩坡的不連續面力學特性與岩坡工程特性；由野外調查成果建立簡化岩坡模型，進行小尺度室內砂箱試驗來掌握在控制地下水深度與滑動面特性的條件下，地下水引致岩坡破壞的行為現象，試驗結果也用以驗證先進數值分析方法在水力－力學耦合行為的模擬正確性；再選擇代表性案例建立全尺度道路邊坡模型，深入探討其變形或失穩範圍受地下水影響的特徵、運動到堆積的動態過程以及對既有人工構造物的衝擊。最後依據研究所得，提出有效監測儀器配置與整治技術的相關建議，並納入其他子計畫之成果，以整合型道路邊坡案例說明計畫成果的應用性。<br> Abstract: Rock slope instabilities, such as rockslides, rock avalanche or rock falls, are common issues along roads in Taiwan. These phenomena represent the main factor that controls the slope morphology and evolution, and also a significant natural hazard that causes great losses and life or property. Although in-situ monitoring devices allow understanding the slope deformation that can improve the safety of the roads, the effectiveness of the system is often unknown. In addition, the applicability of structural/mechanical slope stabilization techniques is difficult to be considered comprehensively when responding to emergency disasters. A more detailed evaluation procedure that linking rock slope deformation, failure mechanism and potential impact will be essential to develop monitoring/remediation/mitigation strategies for the rock slope hazard. In this research project, three main themes will be studied to propose an integrated procedure to contribute to practical rock slope engineering: (1) slope deformation and failure mechanisms of jointed rock slopes due to groundwater variation, (2) structural damages and impact area during the post-regime of jointed rock slope failures and (3) effective mechanisms of monitoring, remediation, and mitigation techniques against related hazard. To prose and integrate a procedure for the analysis of these topics, several methods will be adopted in this study. In particular, advanced discrete element modeling is an important tool for coupled hydro-mechanical problems and will be employed in different stages of rock slope stability assessment. Special attention will spend in the application of advanced discrete element modeling for detailed simulate the past and potential groundwater-induced rock slope failures and for quantitative evaluate the effectiveness of monitoring arrangement and mitigation measures in jointed rock slopes. In addition, detailed field investigations, intensive analysis of discontinuity characteristics based on UAV-based 3D point cloud models, and small-scale sandbox modeling will be performed to complete and verify the numerical approach.節理岩坡地下水水力－力學耦合行為岩坡變形監測岩坡災害整治技術Jointed rock slopegroundwatercoupled hydraulic-mechanics behaviorslope deformation monitoringlandslide mitigation techniques