Abstract

Slope stability is a major concern, particularly in regions that are vulnerable to deep excavations, landslides, or infrastructure development on slopes. Because of its cost-effectiveness, adaptability, and capacity to increase slope shear strength without requiring substantial excavation, soil nailing has become one of the most popular stabilizing methods available. In this paper, using various nail inclination angles with horizontal axis, nail length, and nail spacing, an attempt has been made to determine the ideal soil nailing system. To get maximum Factor of Safety (FOS), different nail inclination, length, spacing were applied to a simulated homogenous soil slope (slope angles 30°, 40°, 45°, 50°, 60°, 70°, 75°, 80° and 90°) using SLOPE/W (GeoStudio 2018 R2). The Mohr-Coulomb expression and the limit equilibrium (LE) approach in the Morganstern-Price method were used to calculate the factor of safety (FOS), with pore water pressure functioning as the Ru value. The results show that the slope's stability is significantly impacted by the length, spacing, and inclination of the soil nails. For soil slopes of 30°, 40°, and 45°, the optimum nail inclination angle was found 25°; for soil slopes of 50°, 60°, and 70°, it was 20°; and for soil slopes of 75°, 80°, and 90°, it was 15° with the horizontal axis. The results also show that the FOS increases with the increase in nail length and decreases with the increase in nail spacing.

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