Slope stability analysis through variational slope geometry using Fellenius Method

Abstract In previous research about analysis of slope stability on Lalingato Area, Tirawuta Districts, Kolaka Timur Regency, Sulawesi Tenggara, has been obtained slope instability with factor of safety between 0.38 - 0.64. This instability is caused by activity of geological structure, such as; joint. In the other hand, the effect of slope between 44 - 67 degrees are very influential. The study has conducted a theoretical investigation of the variation of slope form to minimize the landslide of slope. There were two schemes to investigate of slope stability as follows; (a) slope variation, and (b) slope terraces variation. The research has used Ms. Excel and Slide software. Based on the result of research was obtained that slopes with terraces will be easily stable. Meanwhile, if angle of the terraced slopes was given 35° - 44°, so factor of safety was 1.28 - 1.75. The future about the research will be developed to investigate slope stability with inhomogeneous material.