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Table 10 Properties of the soils at the test sections

From: Use of a 10.22 m diameter EPB shield: a case study in Beijing subway construction

Name Natural density (g/cm3) Dry density (g/cm3) Porosity Liquid limit (%) Plastic limit (%) SPT N-values
Backfill 1.65
Silt 2.02 1.67 0.369 26.3 19.2
Silty clay 1 1.90 1.46 0.463 36.9 24.3
Fine sand 3 2.02 31
Silty clay 2.03 1.66 0.389 31.8 19.6
Silty clay 1 1.89 1.43 0.476 40.9 24.9
Silt 2 2.08 1.76 0.349 26.1 17.6
Medium sand 1 2.10 53
Fine sand 2 2.05 44