Research On Stability Of Bedding Rock Slope Under Bidirectional Earthquake

China's slope disaster-prone areas,due to earthquake-induced slope disasters will cause huge losses,so the slope of the dynamic stability analysis and safety management are geotechnical engineering sector is a major issue.The seismic engineering view holds that the horizontal seismic force is the decisive factor causing the rock and soil damage,and the influence of the vertical seismic force is insignificant.However,many experts found that the vertical seismic force was found in the geological disaster investigation after the Wenchuan earthquake.Slope and construction caused great damage,therefore,the study of bidirectional earthquake under the bedding rock slope stability has a very important practical significance.In this paper,the numerical analysis method is used to analyze the plastic zone development,displacement cloud and shear strain increment and the displacement of key monitoring points at different time points under the horizontal unidirectional and bidirectional seismic action.And the acceleration curve,the damage process and law of the bedding rock slope under the action of the earthquake are obtained.Based on the background of the Tsengjiawan slope project,the numerical analysis model of the bedding rock slope under earthquake action is established,and the reliability safety factor.The stability of the bedding rock slope is analyzed.The limit state equation of the bedding rock slope under earthquake action is established to solve the failure probability time curve of the slope and calculate the critical failure probability.Finally,a new method for comprehensive evaluation of stability of bedding rock slope under earthquake action is proposed by dynamic safety factor and critical failure probability.The study shows that considering the bidirectional earthquake,it can reflect the real response characteristics of the slope in the earthquake.Under the action of the earthquake,the slope failure begins to develop from the front surface of the slope foot,and the shear failure is mainly on the structural plane.The displacement of the rock slope is mainly controlled by the horizontal action,and the vertical seismic force has obvious amplification effect on the displacement of the bedding rock slope due to the addition of the vertical seismic wave under the bidirectional earthquake.And the dynamic safety factor and the critical failure probability are used to evaluate the stability of the bedding rock slope under the action of bidirectional earthquake,which is of great significance to the engineering design and construction.