Research On Stability Of Slope And Steep Embankment In Mountain Area

China has a vast territory,and the hills and mountains are extremely wide.With the development of economy,the construction of road transportation and other infrastructure has been strengthened.,and the construction of slope and steep embankment projects in mountainous areas is frequent.Therefore,the necessity of studying the characteristics of slope and embankment foundation embankments.This thesis uses orthogonal test design pr inciples and response surface test design principles,uses rhino software to build models,uses griddle to mesh,imports FLAC3 D for simulation analysis,studies the stability and settlement deformation of slope embankments,and analyzes four factors Sensit ivity.The following results are obtained:(1)When there is a soft soil layer on the surface of the steep slope foundation,it will have a greater impact on the settlement stability and deformation settlement,and corresponding engineering measures should be taken.(2)Using orthogonal test design principles to simulate the design of embankment projects on soft soil foundations with steep slopes,the range analysis and variance analysis of safety factor and settlement value show that the four factors’ sensitivity are: soil surface slope> soft soil thickness> Severe γ> elastic modulus E,the effect of the surface slope of the soft soil layer is the most significant.When the surface slope of the foundation is 1: 5,the average safety factor is about 1.13,wh ich can be used as a critical indicator to guide engineering practice.(3)Using the principle of response surface test design to simulate the slope embankment foundation embankment engineering design method,when the safety factor is used as the response v alue,the four factors of sensitivity are obtained in this order: φ value> c value> slope steep slope foundation surface slope> embankment filling Height,when c value ≥ 8Kpa,φ value ≥ 20 °,the average fitting factor of safety factor is ≥ 1.3,in actual engineering construction,materials with c value and φ value that meet the ab ove indexes can be selected to fill the slope embankment project,Helps to improve the stability of the embankment.When the maximum settlement value of the embankment is used as the response value,the sensitivity of the four factors is obtained as follows: the elastic modulus of the filling material> the filling height of the embankment> the gravity of the filling material of the embankment γ> the slope of the foundation surface of the steep slope,when the embankment is filled When the elastic modulus of the building material is greater than or equal to 30 Mpa,the fitting average of the maximum settlement value of the embankment is less than or equal to 0.060 m,and the settlement is small.During the actual construction of the project,the compaction of the embankment filling material should be strictly controlled,and the elastic modulus of the filling material The amount is greater than 30 Mpa,which is conducive to reducing the emb ankment settlement,thereby reducing the maintenance cost caused by settlement during the later operation of the slope embankment foundation embankment project.(4)This paper studies the instability of a road subgrade in Yunnan Province,analyzes the causes of the instability of the subgrade,and puts forward the preventive measures.