c	Cohesion
d	Particle size
D	Radius of bearing plate
G	Sample quality
E	Young’s modulus
h	Cone penetration
kb	Fitting parameters
K	Sample compaction degree
lp	Plasticity index
L	Resilience deformation corresponding to the unit pressure
n	Fitting parameters
pa	Standard atmospheric pressure
P	Unit pressure
Sa	Silicon–aluminum molecular ratio
ω	Moisture content
ωe	Expected moisture content
ωL	Liquid limit
ωopt	Optimal moisture content
ρ	Density
ρd	Dry density
ρdmax	Maximum dry density
φ	Internal friction angle
μ	Poisson’s ratio
σ	Subgrade load