Slope stability analysis under different soil nailing parameters using the slope/w software

Abstract

Slope failure is one of the major geological phenomenon that happen due to the topography and weather conditions which cause a wide range of ground movements which needed engineers to plan in order to avoid its risk on human lives and properties by an appropriate stabilizing method. Soil nailing system is considered as one of the major preventive methods and economic systems to overcome the slope failures. In this paper, soil nailing system was studied in term of inclination to determine the most appropriate values for effective stabilization of soil slope using the SLOPE/W software. To validate the results, different soil nail inclinations were applied to a case study, and the Factor of Safety (FOS) of the case study was evaluated as well. The case study is located at Genting Highlands, Pahang. Results showed that the soil nails inclination has significant effect on the stability of the soil slope. For soil slope with steepness of 30°, 45° and 60°, the best FOS found with soil nail inclination (to the horizontal) of 60°, 50° and 40° respectively. The effect of soil nails inclination gives small difference in FOS when the degree of inclination of the soil nails varies within 5° - 20° to the horizontal.