Fig. 4

Comparison of maximum horizontal displacement, maximum shear stress, and maximum plastic strain of the slope obtained by different methods. Note: Method 1 denotes the traditional reduction method; Method 2 denotes c-only reduction method; Method 3 denotes ϕ-only reduction method; Method 4 denotes the non-proportional reduction method; Method 5 denotes the double strength reduction Method 1; Method 6 denotes the double strength reduction Method 2; Method 7 denotes the double strength reduction Method 3.