In total, 192 composite soil and core samples were collected.
Composite soil samples (0 10 cm depth) were digested using a nitric and hydrochloric extraction technique.
The increasing cement content can effectively improve the dynamic strength of EPS composite soil.
The inductive additive approach was used to calculate biological, chemical, physical and composite soil quality indices.
A total of 87 composite soil samples were collected in an area of about 1352 km2.
The characteristics of skeleton curve, dynamic shear modulus and damping ratio for EPS composite soil are analyzed.
It is found that EPS composite soil is characterized by typical dynamic nonlinearity, which is influenced by the mixing ratio and the initial stress state.
Based on the experimental results, this paper provides the empirical models to describe the skeleton curve, modulus attenuation and damping growth characteristics for EPS composite soil.
A composite soil sample was taken for all plots, and pH, organic matter, water content, bulk density, content of nutrients, minerals and heavy metals were determined.
Composite soil samples were likewise collected from the 0 5 and 5 15 cm depths in the A horizon in each quadrant for chemical analysis.
Five composite soil and core samples were obtained from 0 to 15 cm (top-soil) and 15 30 cm (sub-soil) at each plot.
