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

Table 2

Results of Shear Strength Tests.

Vertical stress during shearing [kPa]	The peak shear stress of Nanning expansive soil [kPa]				The peak shear stress of Baise expansive soil [kPa]				The peak shear stress of Shangsi expansive soil [kPa]
	Number of cycles				Number of cycles				Number of cycles
	0	2	4	6	0	2	4	6	0	2	4	6
5	12.09	7.85	5.46	4.10	12.56	6.32	5.66	5.12	11.27	6.62	5.48	4.86
15	15.84	13.60	13.42	12.74	25.30	17.22	14.63	12.10	15.17	12.05	11.14	10.01
30	26.74	22.12	20.46	19.15	29.05	19.47	18.16	16.43	25.91	21.01	18.65	16.94
50	35.41	31.68	29.80	28.01	42.15	33.01	28.48	26.73	36.72	30.10	27.21	25.29
75	45.14	40.57	37.34	36.65	49.91	45.27	40.24	38.96	48.78	40.42	36.90	34.72
100	55.08	50.29	47.37	47.03	60.35	55.84	53.97	51.83	57.25	47.86	43.32	41.05
200	94.14	89.68	86.13	83.93	99.02	94.69	89.26	84.34	96.09	88.21	83.36	79.35
300	139.28	131.70	128.26	127.40	127.06	118.44	116.72	110.94	130.25	120.33	113.67	110.92