Table 3 Key values of slope calculated by different methods.

From: The analysis of the progressive local failure process of the Longquan Reservoir dam based on the global-local dynamic strength reduction method

Different methods

Method 1

Method 2

Method 3

Method 4

Method 5

Method 6

Method 7

Critical reduction coefficient

Fc = 1.27

Fφ = 1.27

Fc = 1.63

Fφ = 1.73

Fc = 1.23

Fφ = 1.3

Fc = 1.37

Fφ = 1.17

Fφ = 1.15

Fc = 1.21Fφ = 1.1 (global zone)

Fφ = 1.06 (shear zone)

Horizontal maximum displacement/cm

5.06

4.36

6.78

5.09

5.02

5.88

4.83

Maximum shear stress/kPa

14.42

13.25

18.65

15.06

12.7

17.48

15.25

Maximum plastic strain/10−2

1.67

1.39

2.36

1.61

1.85

2.82

1.83

  1. Note: The critical reduction coefficient represents the strength reduction required to reach the critical instability state of the slope.
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