Macro- and Microresearch on Swelling Characteristics and Deformation Mechanism of Red-Bed Mudstone in Central Sichuan, China

Table 1

Physical parameters of mudstone.

Sampling location	Statistics	Density (g/cm^3)	Natural water content (%)	Dry saturated absorbed water ratio (%)	Confined swelling ratio (%)	Free swelling ratio (%)	Swelling force (kPa)
Neijiang	Number of samples	14	19	11	4	11	7
	Max	2.57	6.9	11.48	3.42	32.9	1558.9
	Min	2.49	1.98	6.07	0.78	11	152.3
	Average	2.53	4.53	9.47	1.99	24.45	739.1
Yibin	Number of samples	23	18	14	8	27	13
	Max	2.52	5.88	18.19	2.12	33.7	2318.4
	Min	2.46	3.69	12.64	1.68	8.5	356.1
	Average	2.497	4.60	16.32	1.61	23.4	1379.5
Qianjiang	Number of samples	20	20	9	3	13	11
	Max	2.46	5.26	10.14	1.03	15.9	421.3
	Min	2.41	3.82	7.82	0.79	7.3	198.3
	Average	2.42	4.68	9.01	0.89	10.9	239.4