Stability Analysis and Reinforcement of a High-Steep Rock Slope with Faults: Numerical Analysis and Field Monitoring

Abstract

This study present sastability analysis ofahigh teeprockslopewithtwofaultsduringexcavationsandevaluatestheeffectiveness of a proposed reinforcement methodusing prestressedanchorcables.A3D finitedifference modelwasestablishedbased onthe strength reduction method using FLAC3D software. The influence of various fault conditions and the effectiveness of the reinforcement on the slope stability during the excavation process were analyzed and compared to field monitoring data. The numerical analysis and field monitoring results showed that the fault close to the slope surface (f20) was prone to the local instability under external forces caused by the excavation, but a fault further away from the slope surface (f14) had insignificant influenceonthestabilityoftheslope.Basedonthenumericalanalysisresults,theproposedreinforcementmeasurecanincrease the factor of safety (FOS) of the slope by 19.2%. The field monitoring data also showed that the displacement of the monitoring point gradually decreased after the reinforcement, and the deformation of the slope was effectively controlled.