Research On Rock Slope Failure Law Under Ground Motion

The rock failure mechanism under the action of ground motion is relatively complex.Correct understanding of the dynamic response and failure law of the slope can provide technical support for seismic fortification of practical projects.The current seismic response analysis of slopes mainly focuses on the experimental monitoring and numerical simulation of slope displacements and accelerations under earthquakes.There are few studies on the propagation laws and energy distribution laws of seismic waves inside slopes.This paper starts from the perspective of the propagation law and energy distribution law of seismic waves in slopes and combines with the elastic wave theory to discuss the mechanism of the homogeneous slope under seismic load.From the perspective of energy analysis,this paper conducts energy analysis on the dynamical model of the homogeneous rock slope under ground motion and derives the display formula of the ground motion synthesis algorithm and energy synthesis algorithm.Combined with the ultimate rupture energy criterion of the rock mass,the slope rupture area is determined.Using the rock mass ultimate rupture energy analysis method,the energy required for the mudstone fracture is calculated,and the area where the slope breaks is located is preliminarily determined.And further discussed the propagation law of seismic wave ray passing through the structural plane and the law of energy transmission inside the slope body.At the same time,through comparative analysis of the results of energy analysis model,FLAC 3D simulation analysis results and large-scale shaking table test results,and theoretically The phenomenon was analyzed in detail.This paper discusses the influence of ground motion parameter changes on the internal fracture location of the slope.The slope with slope less than 45° is found to be in a straight anti-dip state under the action of small-amplitude ground motion,and the fracture faces the top of the slope as the frequency increases.The slope with a slope greater than 45° is under the action of the ground motion.The fracture surface is in an arc-inclined state,and the fracture faces the slope surface as the frequency increases.Based on the study of the dynamic response model of the slope under the action of ground motion,the stability analysis method of slope exponential rupture surface is put forward.Based on this,the length of the slope ultimate rupture is analyzed to obtain the slope stability coefficient.