Study on Deformation and Stability of High Slope with Weak Intercalated Layers

Abstract

The paper analyzed external deformation, deep deformation and stability of slope with weak intercalated layers in detail through field monitoring of Mayanpo slope at Xiangjiaba Hydropower Station. The results show that: ① Displacement deformation increases with time and decreases with increasing depth, and displacement rate decreases with time. ② Dislocation position exists in weak intercalated layers. Dislocation rate first increases and then decreases until basically stable, and local fluctuations are mainly affected by rainfall and dynamic equilibrium adjustment of the slope internal deformation. ③ Through stability analysis of Mayanpo slope by strength reduction FEM, stability coefficient is 1.72.