Freezing Damage Control of Railway Subgrade Miniature Shields in Cold Climatic Regions: Construction Technology Optimization via Numerical Simulation

Table 1

Physical index of bad subgrade soil.

Physical index	Parameter
Soil properties	Silty clay
Optimum moisture content (%)	20.68
Dry density (g/cm^3)	1.30
Maximum dry density (g/cm^3)	1.76
Liquid limit (%)	36.70
Plastic limit (%)	25.60
Plasticity index	11.0
Liquid index	1.5