Characterization of slope movement hazard at Sukatani-Ciganea railway section using slope stability analysis and center of mass approaches.

The occurrence of rapid slope movements is common in man-made slopes during heavy rainfall in West Java Province, Indonesia, and may pose a risk to transportation infrastructures such as railways and highways. Mitigation of such a landslide risk requires an understanding of the characterization of the hazard. The study presented in this paper aims to characterize a slope failure hazard at a railway section located between Sukatani and Ciganea stations in Purwakarta Regency. The objectives of this study were to determine the sliding surface within the man-made slope using Slope/W and PyBIMstab software and to predict the run-out distance and the velocity of the slope movement using the center of mass approach. Both slope stability software shows a good agreement in determining the slip surface location within the slope at critical safety factors. Based on the center of mass approach, the slope failure is characterized by a run-out distance of about 24.5 m and a movement of more than 6.3 m/s. Therefore, the combination of long run-out and extremely rapid movement indicators would suggest a high risk to the railway traffic. [ABSTRACT FROM AUTHOR]