| dc.description.abstract | Taiwan is located in the Pacific Rim seismic zone, and the geological conditions are
relatively young and fragmented. In terms of climate, it is a subtropical monsoon climate
and easily affected by typhoons in summer. Thus, slopes of mountainous areas are often
subject to sliding after rainfall. The first half of the study focuses on the stability of the
slope by calculating various geological and material factors. The variables considered in
the study are slope, soil thickness, cohesion, friction angle, soil unit weight, etc. The
formula of infinite slope for unsaturated soil and external earthquake force are improved
and modified. Regarding the uncertainties of geology and material parameters using the
Monte Carlo method, it is found that the slope angle has a relatively larger standard
deviation than other factors (soil thickness, groundwater level, cohesion, friction angle),
so the change of slope angle has a significant effect on the slope safety coefficient. In the
second part, numerical simulation with STEDwin, Geostudio and Visual Slope for general
slope analysis are implemented, and Goestudio is used for unsaturated soil analysis. The
modeling is carried out with reference to existing case to compare which parameters have
a great influence on the factor of safety and which software is more conservative. It was
found that the difference between the software was not significant for the same parameters.
However, it was found that the variation of the side slope angle has a large standard
deviation. | en_US |