Research on the Effective Control of Ground Settlement during Double-Layered Foundation Pit Dewatering Based on Seepage Control-Recharge Coupling Model

Table 1

Basic physical and mechanical parameters of the test earth materials.

Soil sample	Moisture content (%)	Liquid/plastic limit (%)	Permeability coefficient	Dry density (g/cm^3)	Proportion
The surface layer of clay	27.6	38.9/19.6	6.1 × 10^−6 cm/s	1.6	2.71
The lower layer of sand	30.7	—	1.3 × 10^−2 cm/s	1.4	2.67