The Study Of Experiment Of The Roadbed Filler’s Frost Heave And Prevention In Seasonal Frozen Ground Area

In this paper, for the seasonal frozen frost heave, as the object of study to the seasonal permafrost of the west of Liaoning Province (Fuxin), theoretical analysis and calculation is taken. At the same time, a certain laboratory test to the validation also is done, focusing on providing solutions or suggestions for frost problems that the roadbed have in the west of Liaoning province.Firstly, A theoretical analysis of frost heaving of the seasonal frozen is done in the article. It include analysis of the causes and course of frost heave, further comprehension and analysis of moisture migration and ice formation process, and the analysis that the soil physical properties impact on the frost heaving. It also points out the interaction between the frost heave and soil factors. On the basis of understanding of the seasonal frozen frost heave problems, the indoor frost heave test is done in the closed system, taking density, moisture content and the freezing temperature for the frost heave influencing factors. Secondly, basing on the test data in the closed system and taking the advantage of multiple linear regression principle, frost heaving prediction model is established. Finally, in connection with roadbed frost heaving in western Liaoning, more specific measures of anti-frost heaving are put forward, which are adding lime method and adding salt method. Meanwhile, the feasibility of the two methods is demonstrated with some associated tests. This has some guiding significance for the highway construction in the seasonal frozen area, and also provides a new way of thinking for the roadbed frost heave problems in western Liaoning.