The Stability Analysis Of Aeolian Sand Embankment Slope

With the progress of society,the geological conditions and the site conditions involved in the construction are becoming more and more complex and the number and complexity of the slopes encountered in engineering are unprecedented as before.Under the action of slope gradient,external load,precipitation,earthquake force and groundwater,the slope can easily lead to the failure of the slope,which can cause the damage caused by the failure,and the accident and the disaster.In this paper,based on the limit equilibrium analysis of principle and agent model,respectively,using the simplex particle swarm optimization algorithm,Monte Carlo method,a second order distance method study the stability of the embankment slope.The main contents are as follows:Firstly,it calculate the safety factor based on simplex particle swarm optimization algorithm.The body stability of the embankment and the overall stability of embankment and foundation generally use the simplified Bishop algorithm according to the requirements of specification.Traditional algorithms exist shortcomings such as poor universality,slow speed,easy to fall into local extremum and so on.Based on particle swarm optimization,this paper puts forward a kind of method that simplex method particle swarm optimization(SM-PSO)is used to determine the most dangerous sliding surface slope and the corresponding minimum safety factor.We also compare it with particle swarm optimization algorithm in optimization efficiency and optimization performance and prove that our method also have obvious improvement than the PSO methods in convergence speed and adaptability,etc.Secondly,it calculate the reliability of slope stability based on Kriging model.In the reliability analysis of the stability of the slope,generally,the function based on simplified Bishop slope is implicit function.So this problem can not be solved by traditional methods of reliability analysis.However,the Monte Carlo simulation method exist shortcomings such as great workload of calculation and low calculation efficiency,which limits its application in practical engineering.In order to solve this problem,this paper focuses on the application of Kriging in slope stability.At the same time,based on active learning and first-order second moment method of Jingha expressway embankment slope stability reliability problems are analyzed.On the same embankment slope,three methods of failure probability of the paper is basically the same.The applicability and rationality of those methods to the reliability analysis of the slope stability are further verified.