Abstract: In order to accurately analyze the stability of spherical weathered mixed granite slope, this paper uses the traditional limit equilibrium method and the finite element strength reduction method to study the influence of boulder content and excavation effect on the stability of mixed granite slope by using commercial numerical analysis software GeoStudio and PLAXIS, respectively. The results show that, when the content of spherical weathering material between 5% and 20%, with 5% of sphere weathering content, the slope stability factor of safety increases by 9.6%; the most dangerous sliding of the slope develops towards the deeper depth; When the content of spherical weathered material exceeds 20%, the slope factor of safety increases slowly; The engineering disturbance affects slope stability. With the increase of engineering disturbance, the slope stability decreases. Finally, a reliable slope treatment method is proposed through the numerical simulation. The research results can provide a theoretical reference for the design and stability analysis of mixed granite slope. 

Key words: Spheroidal Weathering, Mixed Granite Slope, Boulder Content, Excavation Effect, Support of Slope