Experimental and Numerical Analysis of Reinforced Landslide in Static and Dynamic Conditions

This paper presents a detailed study on improving slope stability through soil reinforcement using cement under both static and dynamic conditions. Experimental shear tests were conducted on clay samples taken from an unstable slope section, with varying cement contents (5%, 10%, and 15%) and curing durations (7 and 14 days). The results demonstrate that increasing cement content and extending curing periods significantly enhance shear strength, cohesion and friction angle. Slope stability was analyzed using finite element analysis with Plaxis 2D under both static and dynamic loading, applying the Mohr–Coulomb model with c/φ reduction method to determine the factor of safety. The software employs an implicit integration scheme and the Newton–Raphson iterative method to ensure convergence. The simulation results corroborate the experimental findings, showing that higher cement percentages and longer curing durations lead to an increased factor of safety in both static and dynamic conditions. Additionally, a parametric study was performed, varying mesh density, Peak Ground Acceleration (PGA) values (0.2 g and 0.3 g), to further evaluate slope stability.