Theoretical Analysis And Study On Reliability Of Embankment Slope Stability Under Seismic Load

With the continuous development of railway construction,China's main application of the allowable stress method to design the railway structure,has been unable to adapt to the current design and international needs.Therefore,it is very useful to evaluate slope stability with the combination of reliable and safety factors combining deterministic methods and reliability methods.This article has done a lot of research work for reliability of railway subgrade slope under seismic force.And it can provide reference for the design standard of railway subgrade slope.First,the limit state equation of reliability analysis of railway subgrade slope under earthquake force is established which is according to the Swedish slice method.And then,by using the "JC method",we calculated and compared the reliable indicators of the railway subgrade slope which load is divided into heavy and sub-heavy.At last,the reference value of the fractional coefficient is given by calculated and calibrated their partial factor.(1)We got the variables that affected the stability of the railway subgrade slope by analysis of domestic and foreign literature and summarized the limit state equation of railway subgrade slope according to the Swedish slice method.(2)The reliability index of slope is calculated by using JC method and the calculation program of reliable index of Matlab slope is compiled.When the load of the train is heavy and sub-heavy,the slope stability index is calculated and the reference value of the reliability index of different seismic intensity under two kinds of train loads is obtained.(3)The coefficient of the slope is calculated by suing different train loads under the seismic intensity by suing general separation method and calibrated the results according to the calculated results.And finally shows that the conclusion is reasonable.