The Influence of Initial Normal Stress Assumption of Slip Surface on Safety Factor of Symmetrical Three-Dimensional Slopes

Table 1

The comparison of the calculated safety factor for cases.

Methods	Case 1	Case 2	Case 3
Two-dimensional method	2.038	1.003	1.084
Methods in this paper
	2.305	1.255	1.401
	2.2965	1.254	1.401
	2.322	1.261	1.401
Limit equilibrium solution	2.187
The result computed by Hungr [9]			1.402
The result computed by Zhang [8]	2.122
The result computed by Leshchinsky [10]		1.250
The result computed by Baligh and Azzouz [11]			1.402
The result computed by Gens et al. [12]			1.402