Eolian Sand Subgrade Slope Stability Research On Laboratory Experiment

This paper makes an approach through laboratory large-scale simulation test that combined to test sections with different depths of filling and ratio of slope, based on the investigation of subgrade engineering constructed with eolian sand and data at home and abroad . The characters of mechanical stability of subgrade slope with different compactness .The paper studies the patterns of slope stability failure and its influencing factors and analyses slope stability for subgrade of eolian sand according on-situ test results.Some acquaintance is obtained by test. When measuring point leaves border line of subgrade than 50cm, the position of measuring point and ratio of slope handly affect the modulus of resilience. Vibrating load and dynamic waterpower compacts soil obviously than static load. Through failing load test of subgrade slope constructed with three different techniques, deforming and wreck law of slope is obtained. First subgrade with different ratio generates local and lateral deformation, then the soil on the top of slope slides when the force exceeds critical load. The fracture plane doesn't pass the base of slope. Compare on-situ test with theoretical calculation. Slope stability of subgrade constructed with eolian sand can use theoretical formulae Kmin = tan /tan to calculate. The value of may calculate according toregression equation = 1.20K-71.24 of compactness.