Towards an Advanced New Emerging Method of Determination of Mohr–Coulomb Parameters of Soils from at the Oedometric Test: Case Study-Lateritic Soils of Cameroon

Table 7

Comparison of the parameters of soil obtained by conventional laboratory triaxial and oedometer tests and those obtained by our theoretical method.

Soil body	Parameter	Test value	M-C solution	Error (%)
A1	(bar)	1.25	1.3	−3.85
	C c	0.104	0.128	−18.5
		0.0053	0.007	−18.5
	E (MPa)	6.59	7	−5.82
		—	0.42	—
	c′ (kPa)	38	38	0
	Φ′ = Ψ′ (°)	26.7	28	−4.64
A2	(bar)	1.25	1.3	−3.85
	C c	0.064	0.0075	−14.7
		0.0048	0.005	−6.77
	E (MPa)	10.92	11	−0.71
		—	0.42	—
	c′ (kPa)	45	45	0
	Φ′ = Ψ′ (°)	29.2	29.2	0
A3	(bar)	1.1	1.2	−8.33
	C c	0.144	0.155	−7.1
		0.005	0.006	−16.1
	E (MPa)	8.5	8	6.25
		0.25	0.25	0
	c′ (kPa)	142	132	7.58
	Φ′ = Ψ′ (°)	15.1	16	−5.63
A4	(bar)	1.25	1.25	0
	C c	0.19	0.19	0
		0.0073	0.007	1.39
	E (MPa)	2.31	2.5	−7.68
		—	0.44	—
	c′ (kPa)	29	29	0
	Φ′ = Ψ′ (°)	31.1	32	−2.81
A5	(bar)	0.91	1	−9
	C c	0.053	0.058	−8.62
		0.005	0.005	0
	E (MPa)	6.76	7	−3.48
		—	0.47	—
	c′ (kPa)	44	44	0
	Φ′ = Ψ′ (°)	27.2	30	−9.33
A6	(bar)	0.9	1	−10
	C c	0.056	0.05	12
		0.0065	0.006	18.18
	E (MPa)	6	6	0
		—	0.45	—
	c′ (kPa)	77	77	0
	Φ′ = Ψ′ (°)	23.2	28	−17.14
A7	(bar)	0.325	0.36	−9.72
	C c	0.099	0.118	−16.10
		0.0102	0.009	13.33
	E (MPa)	4.2	3.9	−7.69
		—	0.47	—
	c′ (kPa)	36	36	0
	Φ′ = Ψ′ (°)	31	34	−8.82
A8	(bar)	0.675	0.7	−3.57
	C c	0.185	0.195	−5.13
		0.0063	0.006	10.53
	E (MPa)	2.03	1.85	−9.73
		—	0.45	—
	c′ (kPa)	28	28	0
	Φ′ = Ψ′ (°)	32	31	3.23
A9	(bar)	0.99	1	−13.57
	C c	0.096	0.105	−8.57
		0.0059	0.007	−10.94
	E (MPa)	3.87	4	−3.21
		—	0.41	—
	c′ (kPa)	72	72	0
	Φ′ = Ψ′ (°)	28.8	29	−0.69