Numerical Simulation Of Coupled Freezing And Thawing Of Embankment Roads In Seasonal Frozen Soil Areas

The embankment in heilongjiang province is located in the seasonal frozen soil area,which is severely affected by freezing-thawing damage.There are the phenomenon of frost heave and thawing in the embankment highway,which shorten the overall service life of the embankment.It is based on the analysis of the durability in the road surface material,and the whole structure stability and seepage stability analysis,to explore whether it meet the operation requirements to reduce embankment influenced by freeze-thaw damage.In this paper,combining with the existing research results of concrete,the performance of ordinary concrete,carbon fiber concrete and asphalt concrete is analyzed.The temperature field,thermo-solid coupling field and seepage field of embankment were analyzed by in-situ test data.The analysis shows that,under the effect of freeze-thaw cycle,carbon fiber concrete is better than the other two materials in appearance,strength loss and quality loss.During freezing and thawing cycle simulation of three kinds of material,carbon fiber concrete is better than the other two kinds of material in the whole model of stress and strain diagram and the center of stress and strain curve,which correspond with the test result.The overall temperature distribution can be seen that the temperature distribution of body and foundation more accurately reflect the actual temperature distribution,which are almost consistent with the instrument back to the data.The temperature field,the thermo-solid coupling field and the seepage field analysis of the embankment are analyzed,and the construction of the embankment is good and the soil is more homogeneous.