Slope Analysis Worksheet

Spread Sheet Solution for Slope Stability Analysis Using Fellenius and Simplified Bishop Methods Construction Case

Fellenius Method Simplified Bishop Method f a 0.062 F.S. = 1.174 F.S. = 1.286 F.S. = 1.304

Slice Area Width H1 H2 Gt Wt c (deg.) (deg.) Hw c X l Numer. ma Numer. ma Numer.1 tri 0.0

rec 0.0tri 4.50 0.00 3.20 0.125 0.9 0.09 32.0 -1.7 0.00 0.41 0.56 -0.03 0.984 0.98 0.985 0.98 0.985 0.98

2 tri 0.0rec 0.0tri 3.20 3.20 5.20 0.125 1.7 0.09 32.0 2.9 0.00 0.29 1.05 0.08 1.026 1.30 1.023 1.31 1.023 1.31

2A tri 0.0rec 0.0tri 1.80 5.20 6.40 0.125 1.3 0.09 32.0 8.0 0.48 0.16 0.77 0.18 1.064 0.89 1.058 0.89 1.057 0.89

3 tri 0.0rec 0.0tri 5.00 6.40 8.40 0.125 4.6 0.09 32.0 14.5 3.37 0.46 2.12 1.16 1.101 2.44 1.090 2.46 1.088 2.47

4 tri 0.0rec 0.0tri 5.00 8.40 9.60 0.125 5.6 0.09 32.0 24.8 4.65 0.50 2.19 2.36 1.131 2.70 1.112 2.75 1.109 2.76

5 tri 0.0rec 0.0tri 5.00 9.60 9.00 0.125 5.8 0.09 32.0 35.5 4.01 0.55 2.00 3.38 1.123 2.94 1.096 3.01 1.092 3.02

6 tri 0.0rec 0.0tri 4.40 9.00 7.80 0.125 4.6 0.09 32.0 47.7 1.76 0.59 1.49 3.42 1.067 2.79 1.032 2.89 1.028 2.90

6A tri 0.0rec 0.0tri 0.60 7.80 7.60 0.125 0.6 0.09 32.0 55.1 0.00 0.09 0.21 0.47 1.009 0.41 0.971 0.43 0.965 0.43

7 tri 0.0rec 0.0tri 3.20 7.60 0.00 0.125 1.5 0.09 32.0 60.5 0.00 0.58 0.47 1.32 0.955 1.30 0.915 1.35 0.910 1.36

10 tri 0.0rec 0.0tri 0.0 0.00 0.00 0.00 1.000 0.00 1.000 0.00 1.000 0.00

(1) (2) (3) (4) (4) (4)Sum 26.7 3.64 10.86 12.35 15.76 16.07 16.12

F.S. = (1)+(2)]/(3) F.S. = (4)/(3) F.S. = (4)/(3) F.S. = (4)/(3)

N tanf Wsina ma

F.S. = 1.174 F.S.= 1.276 F.S.= 1.302 F.S.= 1.306

Spread Sheet Solution for Slope Stability Analysis Using Fellenius and Simplified Bishop Methods Long Term Case

Fellenius Method Simplified Bishop Method f a 0.062 F.S. = 1.174 F.S. = 1.286 F.S. = 1.304

Slice Area Width H1 H2 g W c (deg) (deg) Hw c X l Numer. ma Numer. ma Numer.1 tri 0.0