| Summary: | 碩士 === 國立臺灣科技大學 === 營建工程系 === 107 === In the region there was generally influenced by seasonal weather such as highly rainfall intensity, increasing or decreasing water levels may trigger the changing of failure surface and factor of safety on slopes. Reducing the factor of safety causes the slope failure potential increases. It was indicated by the increase of pore water pressure, therefore the shear strength reduced and shear stress enhanced. The uncertain intensity in every rainfall period causes the water level change needs to be evaluated conscientiously to prevent the slope failures. This study primarily aims to investigate the failure mechanisms and factor of safety that are resulted as an impact of pore-water pressure differences by varying the water level, slope angle, soil strength parameters, and slope height with footing and without footing. In addition, cohesive-frictional soils are concerned in this study because this soil condition is commonly found in practice. Limit analysis as one of the rigorous stability analysis methods is used in this study to predict the slope failure mechanism and factor of safety by using two dimensional (2D) numerical approach. The plastic zone will be observed as well in this study as none studies explained it clearly. Latter, the stability charts are also produced for preliminary assessment by practical engineers
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