The Most Dangerous Sliding Surface Search Based On The Limit Equilibrium Method Of Slope And Earthquake Impact Analysis

Slope stability problem has been the hot topics in the study of geotechnical engineering,slope instability property brings great losses to the people and the country.With the rapid development of our social economy and the needs of the development of society,most of the second-tier cities,or even third line cities are in a large number of construction of the subway,people enjoy the convenience of the subway,we also suffer from the dangers of slope unstability,construction of the subway rises in the subway at the same time,countries also begin to a large number of high-speed rail construction,due to the project construction,it will promote the development of slope engineering,slope is particularly important for treatment and prevention.In the first chapter of this article,which mainly introduced the slope outside the domestic and foreign research present situation.In the second chapter,Bishop method and formula of imbalance thrust method is deduced and made a summary.First,genetic algorithm is introduced in the third chapter,then,the slope which is in the literature Zolfaghari proposed is searched the slip surface based on the genetic algorithm.Comparison results show that the method of the location of the search for slip surface is reliable,and this method is better than other traditional methods.The technical code only considers the influence of the horizontal seismic force,but the fourth paper will study the influence of different seismic force direction.Based on the transfer coefficient method,evaluating safety coefficient can easily be transformed into an optimization problem.Through numerous examples show that safety coefficient is symmetrical about horizontal seismic force direction.Examples also visually display the influence of earthquake force directions on residual slide force.Based on genetic algorithm,slope which is 8.5 meters high side slope of different slope is searched slip surface,I get the safety coefficient.The results show that safety coefficient decreases gradually about the same slope gradient with the improvement of seismic coefficient,and the safety coefficient and earthquake influence coefficient is roughly linearly related.The most dangerous earthquake force direction has nothing to do with the earthquake influence coefficient,but is proportional to the slope.In this paper,the results can provide reference for engineering practice.