Prediction Model of Dynamic Resilient Modulus of Unsaturated Modified Subgrade under Multi-Factor Combination

The objective of this research is to solve the problem lack prediction methods and basis for long-term road performance oil shale residue-modified soil in seasonally frozen regions. This paper summarizes expands resilient modulus related literature. Based on measured soil–water characteristic curve (SWCC) compacted modified trend characteristics dynamic under freeze–thaw cycles, a semi-empirical model proposed. was used quantitatively forecast unsaturated subgrade after cycle seasonal permafrost region. applicability accuracy method were verified by tests various cycles moisture content. results show that has high degree fit experimental data more suitable predicting change compared existing models.