Table 2: Basic properties of the field-test soil.

PropertiesValue

In-suit soil
Maximum dry density (kg/m3)1549
Water content (%)12
Liquid limit (%)25.9
Plastic limit (%)17.3
Void ratio42.3
Backfill sand
Maximum dry density (kg/m3)1730
Coarse sand (0.5∼3 mm) (%)35
Medium sand (0.35∼0.5 mm) (%)57
Fine sand (0.25∼0.35 mm) (%)8
Grade120