邊坡穩定所需考量的因素及破壞機制，應依不同地形與地質構造而有所不同。因此建立陡峭岩坡之適當分析模式，進行相關之定性與定量分析，瞭解其傾倒作用機制是本研究之目的。本研究利用UDEC軟體進行數值模式分析，重點在探討岩坡傾倒之漸進式破壞歷程，包含各歷程之應力調整、節理面錯動、張力裂縫及塑性區的發展等等，本研究之關注重點。研究結果顯示，陡峭岩坡之力學行為會受岩坡角度、節理組數、節理勁度比、岩性(硬岩、軟岩)等等影響，由漸進式破壞歷程之應力及變形相對大小及分佈，可以提供陡峭岩坡整治及監測布設之參考。

The influential factors and failure mechanisms of steep rock slope are dependant on the topography and geological structure of slope. Therefore, how to establish appropriate analytical model and how to analyze the qualitative and quantitative characterization related to steep rock slope are the purpose of this study.
Numerical code UDEC was used to build numerical model and perform analysis in the study. The investigation focused on the progressive destruction of toppling of steep slope. Important issues include stress redistribution, slip dislocations of joints, tension cracks and the development of the plastic zone.
The analytical results show that the mechanical behavior of steep slope is influenced with slope angle, numbers of joint set, stiffness of joints, rock strength (hard rock, soft rock). Base in the region of equal-stress contour, the magnitude of deformation and plastic zone of different progressive periods, some suggestions are proposed for remediation and monitoring of steep rock slope.

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