Stability and Failure Mechanism Analyses of the Zhenggang Landslide in Southwestern China

Table 3

Factors of safety for different landslide stages in Zone I and Zone II.

Sliding surfaces	φ (°)	c (kPa)
		33.60	40.80	45.60	48.00	50.40	55.20	62.40
The 3rd stage of A-A′ in Zone I	18.55	0.807	0.819	0.827	0.831	0.835	0.843	0.855
	22.53	0.952	0.964	0.972	0.976	0.980	0.988	1.000
	25.18	1.054	1.066	1.074	1.078	1.082	1.090	1.102
	26.50	1.106	1.118	1.126	1.130	1.134	1.142	1.154
	27.83	1.160	1.172	1.180	1.184	1.188	1.196	1.207
	30.48	1.271	1.283	1.291	1.295	1.299	1.307	1.319
	34.45	1.450	1.462	1.470	1.474	1.478	1.485	1.497
The 1st stage of B-B′ in Zone II	18.55	0.850	0.855	0.858	0.860	0.861	0.865	0.870
	22.53	0.965	0.970	0.974	0.976	0.977	0.981	0.986
	25.18	1.046	1.051	1.055	1.056	1.058	1.062	1.067
	26.50	1.088	1.093	1.096	1.098	1.100	1.103	1.108
	27.83	1.130	1.136	1.139	1.141	1.143	1.146	1.151
	30.48	1.219	1.224	1.228	1.229	1.231	1.235	1.240
	34.45	1.361	1.367	1.370	1.372	1.373	1.377	1.382