At present most high-quality roads in China are established on high-subgrade.However

high-subgrade costs more than low-subgrade does since the former needs much larger fill section than low-subgrade.In addition

high-subgrade will produce some hidden trouble to the road in service time.In special when high-quality road is built on soft ground

some reinforcing measures should be adopted resulting in rising of the cost of construction.To solve these problems artificial hard crust proposed in this paper is an alternative that can reinforce soft ground while reducing the depth of sub-grade and the cost of construction.Through laboratory tests

theoretical analysis and in-situ experiment on artificial hard crust reinforcement

artificial hard crust is not only technological feasible

but also more cost-effective than the other ground improvement methods.