Estimating the Climate-Controlled Soil Parameters and the Distorted Mound Shape for Analysis of Stiffened Rafts on Expansive Soils

Table 1

Average properties for expansive soils at different locations in the KSA.

No.	Location	Soil type	USCS group symbol	Consistency limits (%)			Suction parameters (bars)		Slope of SWRC (kPa or p^F) units	In situ water content	% Clay
				LL	PL	PI	A	B	B = (dh/dw)	(%)	(%)
1	Tayma	Silty shale	CL–ML	38	27	13	1.85	−0.057	−5.70	2.3	23
2	Tabuk	Clay shale	MH	61	27	34	1.61	−0.025	−2.50	4.5	45
3	Al-Ghat	Silty shale	CL	46	21	25	1.67	−0.017	−1.70	12	45
4	Al-Ghat	Clay shale	CH	65	30	35	2.1	−0.025	−2.50	19	72
5	Madina	Green clay	CH	105	39	66	2.28	−0.03	−3.00	59.1	64
6	Madina	White clay	CH	82	37	45	2.34	−0.045	−4.50	33.1	68
7	Hofuf	Calcareous clay	CH–MH	60	24	36	2.16	−0.033	−3.30	14	37

USCS, unified soil classification system; SWRC, soil–water retention curve.