Soil Improvement of EPBS Construction in High Water Pressure and High Permeability Sand Stratum

Table 1

Grading sand particles.

Particle size (mm)	>20	20–2	2–0.5	0.5–0.25	0.25–0.075	0.075–0.005	<0.005
Percentage	0	1.9	15.9	37.9	21.7	17.3	5.3