Rock Slope Stability Analysis by Strength Reduction Dynamic Method

There exist limitations when evaluating the seismic stability of a slope by traditional pseudo-static method or time history of safety factor analysis method.Static and dynamic calculations are conducted after reduction of shear strength and tensile strength.Stability and the safety factor are estimated based on the trend of the key points' displacements and reduction factor-displacement curves of the key points at the end of the earthquake.A relatively accurate inflection point and corresponding safety factor are determined through analysis of the key points' displacements under different reduction factor in the same coordinate system.As an application of this method,the seismic stability of a slope behind Haokou hydropower plant is evaluated and the safety factor under earthquake is obtained,which verifies the feasibility and rationality of the proposed method for slope stability analysis.