Stability Analysis Of Soil Nailing Support Structure And Sensitivity Analysis Of Its Influencing Factors Under Earthquake

The stability analysis methods of soil nail supporting structures unde r seismic action mainly include pseudo-static method and time-history analysis method.Among them,the quasi-static method based on limit equilibrium method is the most widely used.However,the existing studies on pseudo-static method are mostly based on circular arc sliding surface or straight sliding surface,which lacks of studies on other sliding surface forms.In the analysis of the stability influence factors,often using numerical,change the single factor and other factors numerical remains the sam e,then draw the factors of different value,stability coefficient corresponding value curve,by studying the trend of graphics concludes that the factors influencing the stability coefficient of the trend,but impossible to quantify the method shows the influence of various factors on the stability.Based on the above problems,this article mainly studies the stability of soil nail support structure under earthquake action and the sensitivity of related influencing factors based on previous research results.The main contents are as follows:(1)This article expounds the main components and functions of soil nail supporting structure,and expounds the working mechanism and working process of soil nail supporting structure.This article introduces several sliding surface forms in common use,and summarizes several methods that can be used to calculate the stability coefficient of soil nailing support structure.At the same time,the methods of applying seismic force are summarized,and their action modes and char acteristics are described in detail;(2)Assumes that the parabolic slip surface of soil nailing structure slope slip plane,on the basis of considering the influence of the horizontal seismic force,combined with vertical bars points method and level of metho d of soil nailing structure under the action of the earthquake stability analysis,calculating stability coefficient of the slip surface sliding resistance and the ratio of slide,on the basis of the established side slope surface sliding out abscissa poin t position and the stability coefficient,the mathematical expressions between the use of MATLAB in the genetic algorithm to search critical slip surface area may be produced in the region to get the most dangerous slip plane position and the corresponding stability coefficient,Finally,the calculation results of the method in this article are compared with those of the existing three kinds of stability analysis method of soil nail supporting structure under seismic action;(3)According to the characteristics of the uniform test and principle,selection of reasonable and appropriate level,and develop the use of uniform design table and its corresponding change,on the basis of stability coefficient calculation method of this paper,the stability coefficient and the side slope surface sliding out point location as the dependent variable,objective factors and design factors as independent variables,study the factors affecting the action of the earthquake nail structure stability and the degree of impact point location.