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

Table 3

Shear strength reduction ratio of expansive soil with different wetting-drying cycles and loadings.

Vertical load [kPa]	Nanning soil [%]				Baise soil [%]				Shangsi soil [%]
	Δ0,	Δ2,	Δ4,	Δ6,	Δ0,	Δ2,	Δ4,	Δ6,	Δ0,	Δ2,	Δ4,	Δ6,
5	0	34.70	54.24	65.43	0	49.22	54.38	58.67	0	41.25	51.38	56.88
50	0	10.43	15.69	20.70	0	21.48	32.11	36.22	0	18.03	25.90	31.13
100	0	8.61	13.86	14.48	0	7.41	10.45	13.98	0	16.40	24.33	28.30
300	0	5.39	7.83	8.44	0	6.71	8.05	12.56	0	7.62	12.73	14.84