Research on Rutting Prediction Model of OGFC Asphalt Mixture in Seasonally Frozen Zone
In order to promote the application of OGFC asphalt mixture in seasonal frozen area,the high temperature rutting resistance of OGFC asphalt mixture in seasonal frozen area is studied,and the rutting prediction model is established,then a rutting test system was used to conduct rutting tests,analyzing the effects of axle load cycles,specimen height,temperature,shear strength,and freeze-thaw cycles on the rutting depth of OGFC asphalt mixture.Based on the empirical method,the rutting prediction model of OGFC asphalt mixture in seasonal freezing zone was established.The parameters of the model are fitted by the least square method,and the established prediction model was verified by indoor tests and compared with the finite element analysis.There is a power function relationship between the influencing factors and the rutting depth.The freeze-thaw cycle accelerates the formation of rutting.The relative error between the measured rutting depth and the predicted rutting depth of the model is 0.11％～9.81％.The rutting prediction model of OGFC asphalt mixture in seasonal frozen zone established by the empirical method has high prediction accuracy.The rutting prediction model of OGFC asphalt mixture in seasonal frozen area established by the empirical method has high prediction accuracy.The error of the prediction model is affected by the test conditions and material parameters,among which the material parameters are more obvious.
seasonal freezing areaOGFC asphalt mixtureempirical methodrut prediction modelfinite element
NETL
NSTL
万方数据
