Parameters Analysis of Grouted Bolts by Lagrangian Difference Method

The fundamental of lagrangian difference method based on strength reduction is thoroughly expounded.Safety factor is chosen as the criterion of slope stability.A numerical simulation model and a sensitivity analysis model for an isotropic soil slope are founded.Six reinforcement parameters of the wholly grouted bolt are changed.Safety factors of the slope and the sensitivity of the impact of the parameters on the factors are calculated by FLAC3D to analyze of the influences of the parameters on the stability of slope.The calculation results show that the parameters in descending order are bolt length,vertical spacing,bolt inclination,location,bolt diameter and grout thickness according to their influences on the stability of slope.