ABSTRACT
In this paper, the swelling shrinkage properties of compacted expansive soil in Huaiyin Section of Ning-Lian High-grade Road are introduced, and its swelling shrinkage mechanisms are discussed based on the change of soil water content dry density, material composition and microstructure. Finally, it's pointed out that in engineering practice this kind of compacted expansive soil called as "artificial expansive soil" should be paid enough attention in case great damage be caused.
