Design Method Research Based On Limit State Of Reinforced Earth Retaining Wall

At present,design method on retaining structure of railway subgrade is in the process of the traditional general safety factor method to limit state design method based on the probability theory in China,and systematic limit state design expression of retaining structure needs to build.Retaining structure of pile plate retaining wall,anchored retaining wall,gravity retaining wall and so on,have been carrying out some research about the limit state design method.But so far,the research of reinforced earth retaining wall is relatively less,and the conclusion is lacking.Therefore,this paper is systematic research the limit state design method of reinforced earth retaining wall,It is great significance to improve transform of the design method on retaining structure of railway subgrade.In this paper,the research of the limit state design method about reinforced earth retaining wall reference to the research method of the other retaining structure's limit state design method,The main works and conclusions of this paper are as follows:(1)The paper determines the limit state equations and functions of reinforced earth retaining wall with the analysis and calculate.The main random variables of the reinforced earth retaining wall are determined by the single factor sensitivity analysis,including the internal friction angle of soil,unit weight of soil,friction coefficient of soil and tension,the limit strength of tension and so on.(2)the reliability index are calculated by the Monte Carlo method procedure with Fortran language.Then statistical analysis the calculation results of reliability index,and put forward the target reliability index.(3)on the basis of the target reliability index,the resistance and load partial coefficient of reinforced earth retaining wall are calculated by the general separation method.and the partial coefficients are checked.and established the limit state design expression.