Impact of fluid turbulent shear stress on failure surface of reservoir bank landslide

Based on geological investigation, in situ monitoring data analysis, and numerical simulation, a new approach to explain the effect of the reservoir water storage on activation of the sliding phenomenon is discussed in this paper. The paper proposed the method of groundwater level distribution function in case of different rate of water level rise in reservoir by using Boussinesq equation solved by Laplace change and Laplace inverse transformation. On comparing the in situ deformation monitoring data and fluid flow property near sliding surface, the mechanism of reservoir water-induced slope instability was understood. Fluid dynamic property affecting the slope deformation can be described as turbulent bottom shear stress at the failure surface for the phreatic water type landslide. The relationship between the stability coefficient, the deformation of the slope, and the fluid flow was established by using modified Boussinesq equation. Finally, with due consideration to the stability of the reservoir bank landslide, the method of calculation for rate of critical reservoir water storage was provided.