Assessment of Stiffness and Strength Parameters for the Soft Soil Model of Clays of Cameroon

Table 3

Summary of laboratory test results on soil samples (soil samples 1–71) and statistical significance of these laboratory data.

Soil samples	Physical identification oedometer parameters
	Type of soil	K (m/s)	Wnat (%)	LL (%)	PI (%)	Eoed (kPa)	e0	(kPa)	Cc
1	Nodulated reddish clay	6.90E − 07	29.6	70.6	34.3	6800	0.74	60	0.131	0.007
2	Nodulated reddish clay	1.61E − 08	24.4	65.4	32.5	9600	0.678	50	0.08	0.006
3	Nodulated reddish clay	3.77E − 10	24.3	54.4	23.8	13800	0.652	85	0.067	0.0042
4	Nodulated reddish clay	8.44E − 11	27.4	65.2	34.7	8600	0.675	99	0.101	0.005
5	Yellowish clay	2.05E − 07	29	61.2	26.7	8700	0.728	115	0.108	0.0066
6	Yellowish lateritic gravel	9.03E − 10	19.4	60.6	26.9	8700	0.575	140	0.128	0.0074
7	Yellowish clay	6.09E − 09	23.1	—	—	9900	0.625	125	0.104	0.0053
8	Brown clay	5.32E − 10	26.7	—	—	15100	0.65	100	0.064	0.0048
9	Yellowish clay	4.69E − 09	20.9	—	—	—	0.55	110	0.144	0.005
10	Altered rock in reddish lateritic clay	4.64E − 06	23.6	71.6	33.6	4000	1.24	28	0.329	0.0163
11	Altered rock in yellowish lateritic clay	2.61E − 07	20	58.4	30.1	3000	0.975	37.5	0.251	0.0099
12	Reddish lateritic clay	—	20	76.2	41.1	—	1.27	19	0.18	0.02
13	Reddish lateritic clay	8.27E − 08	23.1	75.8	39.3	10800	0.955	28	0.16	0.016
14	Altered rock in reddish lateritic clay	3.60E − 06	17.2	76.9	36.8	2700	1.1	36	0.293	0.0164
15	Altered rock in Motley clay	3.60E − 06	12	69.9	35.2	2800	1.075	52.5	0.272	0.0109
16	Altered rock in reddish clay	—	8.1	71.9	32	−	0.98	60	0.226	0.0134
17	Altered rock in Motley clay	5.87E − 07	9.2	64.2	28.5	3000	0.73	50	0.252	0.0057
18	Nodulated reddish clay	2.03E − 11	23	62	30	9600	0.625	87.5	0.057	0.0086
19	Nodulated reddish clay	1.07E − 09	25	66	31	4400	0.625	125	0.19	0.0073
20	Nodulated reddish clay	1.77E − 08	29	53	25	14000	0.625	91	0.053	0.0053
21	Nodulated reddish clay	1.15E − 09	29	71	33	10500	0.68	52.5	0.069	0.001
22	Nodulated reddish clay	7.65E − 09	27	62	30	13300	0.722	87.5	0.056	0.0096
23	Nodulated reddish clay	3.71E − 10	27	67	31	7800	0.71	22.5	0.074	0.009
24	Nodulated reddish clay	3.24E − 10	30.1	65	30	−	0.695	32.5	0.079	0.0102
25	Nodulated reddish clay	9.27E − 11	27	68	36	10900	0.635	65	0.058	0.014
26	Nodulated reddish clay	—	34	67	35	5900	0.652	45	0.093	0.0133
27	Yellowish clay	5.55E − 08	33	66.9	32.9	2800	1.13	32.5	0.288	0.007
28	Motley clay	1.43E − 07	30.5	70.4	31.8	2700	1.15	63	0.348	0.007
29	Reddish lateritic clay	2.19E − 07	24.5	62.8	31.8	4200	0.825	65	0.215	0.0033
30	Altered breastplate in reddish clay	9.35E − 07	21	52.1	24.5	5900	0.655	55	0.138	0.004
31	Altered breastplate in Motley clay	1.55E − 07	25	83.6	40.1	2200	1.2	8	0.301	0.0055
32	Altered breastplate in reddish clay	3.73E − 07	22.9	68	31.6	4800	0.68	70	0.185	0.0042
33	Altered breastplate in reddish clay	1.96E − 07	26.9	80.2	40.5	5100	0.675	85	0.203	0.0066
34	Altered breastplate in yellowish clay	3.00E − 07	28.4	63.9	27.5	2700	1.24	50	0.406	0.0121
35	Reddish lateritic clay	3.95E − 07	23	74	37	2800	1.08	9.2	0.335	0.0082
36	Reddish clay gravel	1.59E − 08	17.7	65	35	2200	0.328	67.5	0.185	0.0063
37	Reddish clay gravel	3.41E − 09	25.4	61	28	3100	0.32	87.5	0.22	0.0063
38	Reddish clay gravel	2.27E − 10	23.3	58	31	8500	0.365	99	0.086	0.0059
39	Reddish clay gravel	6.47E − 09	18.4	66	29	6400	0.275	130	0.14	0.0068
40	Reddish clay gravel	3.04E − 11	18	58	27	6000	0.448	57.5	0.073	0.0069
41	Altered rock in Motley clay	4.77E − 07	17.8	69.9	36.6	3600	0.89	31	0.209	0.0093
42	Altered rock in reddish clay	3.14E − 07	25.6	74.4	33.2	6900	0.795	67.5	0.124	0.0077
43	Altered rock in reddish lateritic clay	3.32E − 06	24.4	66.4	36	4800	0.972	78	0.164	0.0057
44	Altered rock in reddish lateritic clay	9.58E − 07	19.6	68.9	36.6	3800	1.015	80	0.225	0.0087
45	Motley clay	1.31E − 07	18.1	29.3	16.3	2300	0.8	50	0.279	0.0059
46	Yellowish sandy clay	2.02E − 07	17.4	31.3	16.5	3700	0.72	65	0.205	0.0069
47	Yellowish sandy clay	1.20E − 07	17.3	29.2	14.7	4300	0.78	62.5	0.177	0.0059
48	Yellowish clay	3.30E − 07	20.8	73.3	37.7	5000	0.88	95	0.23	0.0226
49	Altered rock in yellowish clay	1.72E − 07	18.8	48.4	19.7	3900	0.95	102	0.367	0.0085
50	Motley lateritic clay	1.20E − 07	23.3	68.8	29.9	8300	0.83	103	0.16	0.0072
51	Altered rock in Motley clay	2.96E − 07	32.7	53.8	17	4800	1.31	104	0.414	0.015
52	Brown clay	2.95E − 07	25.8	51.8	20.8	2300	0.8	20	0.283	0.0097
53	Yellowish clay	1.96E − 07	21.1	51.4	22.8	1900	0.845	29	0.334	0.0093
54	Altered rock in reddish clay	8.62E − 06	33.1	60.3	27	4400	1.02	70	0.19	0.0073
55	Reddish lateritic clay	1.10E − 07	22	66	33.5	4800	0.778	57.5	0.155	0.0064
56	Motley lateritic clay	3.10E − 07	28.3	71.3	31.4	3300	1.2	34	0.252	0.0087
57	Altered rock in reddish lateritic clay	5.90E − 07	30	56.2	25.1	3200	1.16	40	0.256	0.0136
58	Altered rock in reddish lateritic clay	2.16E − 07	26	60.6	28.9	5600	1.08	72.5	0.171	0.0136
59	Yellowish clayed sand	2.29E − 04	16.56	50.08	22.92	−	0.550	120	0.159	0.004
60	Yellowish sandy clay	1.47E − 05	16.99	66.33	30.16	−	0.607	100	0.29	0.005
61	Yellowish sandy clay	6.04E − 06	21.98	76.03	34.56	−	0.628	65	0.209	0.005
62	Reddish clay	—	28	73	33	5863.3	1.4	90	0.423	0.021
63	Altered rock in Motley clay	—	28	74	27	4952.3	0.85	102.5	0.347	0.027
64	Altered rock in yellowish lateritic clay	—	26	69	19	4661.5	0.98	60	0.308	0.022
65	Altered rock in Motley clay	—	25	26	26	9938.3	0.84	40	0.255	0.017
66	Reddish clay	—	28	54	20	7123	0.99	50	0.2	0.013
67	Reddish soft clay	—	36	62	17	4431.6	1.37	77.5	0.389	0.025
68	Altered rock in reddish clay	—	40	53	12	4614.8	1.38	57.5	0.37	0.023
69	Altered rock in reddish clay	—	56	74	27	5534.1	1.64	29	0.406	0.015
70	Reddish clay	—	33	62	22	6717.78	1.41	15	0.395	0.015
71	Reddish clay	—	33	58	19	6252.67	1.18	62.5	0.236	0.017
	Average value	4.88E − 06	24.76	62.97	29.08	5942.02	0.86	66.38	0.21	0.01
	Variance of soils samples	9.03E − 10	49.32	132.97	45.86	−	0.08	993.87	0.01	0.00
	Standard deviation	3.00E − 05	7.02	11.53	6.77	3219.58	0.29	31.53	0.1	0.01
	Confidence interval range	−2.52E − 05	17.73	51.44	22.31	2722.44	0.57	34.85	0.11	0.00
		3.49E − 05	31.78	74.5	35.85	9161.6	1.15	97.9	0.32	0.02
	Maximum value	2.29E − 04	56	83.6	41.1	15100	1.64	140	0.42	0.03
	Minimum value	2.03E − 11	8.1	26	12	1900	0.28	8	0.05	0.00
	Median value	1.84E − 07	24.5	65.3	30.05	4876.15	0.8	63	0.2	0.01