Steel slag improved silty clay roadbed material and filling method thereof

The invention relates to the technical field of highway subgrade engineering, in particular to a steel slag improved silty clay subgrade material and a filling method thereof.According to the steel slag improved silty clay subgrade material and the filling method thereof, the mixing amount of steel slag is set to be 30%-70% of the mass of silty clay, 50% of the mass of the silty clay is the optimal mixing amount, and cement accounting for 2% of the total mass of improved soil is added; therefore, the strength and the water stability of the steel slag improved silty clay compared with the silty clay are further improved on the basis of controlling the material cost. Compared with unimproved soil, the silty clay improved by the method has the advantages that the bearing ratio is improved by 5-22 times, the water stability is improved by 0.8-4.3 times, the components of the leachate meet the relevant provisions about drinking water in Environmental Quality Standard for Surface Water (GB 3838-2002) and Quality St