Study on Strength Attenuation Characteristics of Residual Expansive Soil under Wetting-Drying Cycles and Low Stress and Its Relationship with Shallow Landslide

Table 4

Shear strength parameters of high and low stresses.

Stress interval	Parameters of strength	Nanning soil specimen under dry-wet conditions				Baise soil specimen under dry-wet conditions				Shangsi soil specimen under dry-wet conditions
		Number of cycles				Number of cycles				Number of cycles
		0	2	4	6	0	2	4	6	0	2	4	6
High stress	[°]	22.58	22.00	21.90	21.76	19.02	18.18	18.51	17.46	20.07	19.88	19.26	19.07
	[kP]	13.17	9.82	6.97	6.32	22.30	14.33	10.71	9.83	21.44	13.18	10.33	8.19
Low stress	[°]	25.78	25.13	24.03	24.13	26.90	27.96	25.20	25.16	28.79	25.81	24.02	23.01
	[kP]	10.12	6.72	5.67	4.44	14.02	5.64	4.95	3.41	8.34	5.11	4.28	3.50