Effect of Vertical Pressure on Horizontal and Vertical Permeability of Soil and Effect of Surcharge Pressure on 3D Consolidation of Soil

Table 5

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

Types of soil	Surcharge pressures	Consolidative vertical stresses	Compression indices	Coefficient of consolidation
	(kN/m^2)	σ (kN/m^2)	Cc	cv3 × 10^−6 (m^2/s)
Silty sand with clay soil	00	100	0.0130	03.26
		200	0.0290	07.13
		400	0.0461	14.92
		800	0.1920	18.47
	10	100	0.0106	03.08
		200	0.0243	06.78
		400	0.0387	14.16
		800	0.1632	17.55
	15	100	0.0099	03.04
		200	0.0228	06.65
		400	0.0365	13.87
		800	0.1542	17.16
	20	100	0.0093	02.94
		200	0.0215	06.15
		400	0.0345	13.44
		800	0.1458	16.63
	25	100	0.0088	02.70
		200	0.0203	05.86
		400	0.0326	12.88
		800	0.1370	15.86
Silty-clay soil	00	100	0.0261	01.03
		200	0.0560	01.87
		400	0.1190	04.30
		800	0.2993	04.61
	10	100	0.0202	00.94
		200	0.0420	01.72
		400	0.0904	03.95
		800	0.2304	04.24
	15	100	0.0181	00.90
		200	0.0382	01.62
		400	0.0831	03.77
		800	0.2119	04.00
	20	100	0.0157	00.86
		200	0.0334	01.53
		400	0.0739	03.60
		800	0.1907	03.85
	25	100	0.0133	00.84
		200	0.0257	01.51
		400	0.0642	33.10
		800	0.1668	03.71