Study on the interaction of anti-slide pile and embedded rock mass based on blasting equivalent load

Blasting vibration is one of important factors to induce the failure of landslide. The interaction between anti-slide pile and rock mass under blasting load is a prerequisite to ensure the stability of anti-slide pile. According to the prototype of a landslide in Hunan Province, the dynamic response model of anti-slide pile and embedded rock mass with blasting Equivalent load was established in FLAC3D. The results indicate that the displacement, acceleration and velocity of the slope are consistent. However, the stress of the slope is inconsistent. Moreover, the surface of the bedrock is affected by the blasting load, and the value increases with the elevation. The vibration effect is not obvious around the pile. Furthermore, the stress of the slope foot is largest. The bending moment is convex shape distribution along the pile. By analysis of displacement, acceleration. velocity and stress, the foot of the slope. the middle and trailing edge of the landslide are susceptible to tensile damage. According to the blasting safety criterion, we may draw the conclusion that the slope is in a safe after blasting. Those results will provide theoretic basis for the anti-slide design when blasting construction is utilized in landslide area.