Table 5: Compression indices and coefficient of consolidation of soils using the 3D consolidation apparatus under surcharge pressures.

Types of soilSurcharge pressuresConsolidative vertical stressesCompression indicesCoefficient of consolidation
(kN/m2)σ (kN/m2)Cccv3 × 10−6 (m2/s)

Silty sand with clay soil001000.013003.26
2000.029007.13
4000.046114.92
8000.192018.47
101000.010603.08
2000.024306.78
4000.038714.16
8000.163217.55
151000.009903.04
2000.022806.65
4000.036513.87
8000.154217.16
201000.009302.94
2000.021506.15
4000.034513.44
8000.145816.63
251000.008802.70
2000.020305.86
4000.032612.88
8000.137015.86
Silty-clay soil001000.026101.03
2000.056001.87
4000.119004.30
8000.299304.61
101000.020200.94
2000.042001.72
4000.090403.95
8000.230404.24
151000.018100.90
2000.038201.62
4000.083103.77
8000.211904.00
201000.015700.86
2000.033401.53
4000.073903.60
8000.190703.85
251000.013300.84
2000.025701.51
4000.064233.10
8000.166803.71