Research Article
Determination of Mohr–Coulomb Parameters from Nonlinear Strength Criteria for 3D Slopes
Table 1
The equivalent friction angle
(°) for various soils.
| | β (°) | m | 1.2 | 1.4 | 1.6 | 1.8 | 2.0 | 2.2 | 2.5 |
| 0.5 | 20 | 14.30 | 10.57 | 8.31 | 6.78 | 5.69 | 4.87 | 3.98 | 30 | 17.52 | 13.15 | 10.50 | 8.72 | 7.44 | 6.49 | 5.43 | 40 | 18.96 | 14.63 | 11.86 | 9.95 | 8.56 | 7.50 | 6.32 | 50 | 19.78 | 15.60 | 12.82 | 10.85 | 9.39 | 8.27 | 7.01 | 60 | 20.33 | 16.30 | 13.53 | 11.54 | 10.05 | 8.89 | 7.57 |
| 1.0 | 20 | 15.41 | 12.07 | 9.76 | 8.03 | 6.75 | 5.79 | 4.72 | 30 | 22.99 | 17.44 | 13.84 | 11.40 | 9.66 | 8.37 | 6.95 | 40 | 28.73 | 21.55 | 17.08 | 14.08 | 11.95 | 10.36 | 8.62 | 50 | 32.06 | 24.49 | 19.61 | 16.27 | 13.86 | 12.05 | 10.06 | 60 | 34.01 | 26.63 | 21.61 | 18.07 | 15.48 | 13.52 | 11.34 |
| 2.0 | 20 | 15.45 | 12.35 | 10.13 | 8.47 | 7.19 | 6.19 | 5.08 | 30 | 23.54 | 18.77 | 15.28 | 12.74 | 10.86 | 9.43 | 7.85 | 40 | 32.06 | 25.32 | 20.36 | 16.85 | 14.29 | 12.37 | 10.26 | 50 | 40.63 | 31.64 | 25.26 | 20.81 | 17.60 | 15.21 | 12.59 | 60 | 47.52 | 37.19 | 29.79 | 24.56 | 20.78 | 17.96 | 14.87 |
| 3.0 | 20 | 15.46 | 12.38 | 10.20 | 8.55 | 7.28 | 6.29 | 5.17 | 30 | 23.55 | 18.91 | 15.52 | 13.03 | 11.17 | 9.73 | 8.12 | 40 | 32.17 | 25.88 | 21.11 | 17.61 | 15.00 | 13.02 | 10.82 | 50 | 41.45 | 33.36 | 27.00 | 22.36 | 18.95 | 16.38 | 13.57 | 60 | 51.13 | 41.09 | 33.12 | 27.30 | 23.05 | 19.87 | 16.40 |
| 5.0 | 20 | 15.46 | 12.40 | 10.23 | 8.59 | 7.33 | 6.35 | 5.23 | 30 | 23.55 | 18.94 | 15.62 | 13.18 | 11.34 | 9.91 | 8.30 | 40 | 32.18 | 26.05 | 21.45 | 18.02 | 15.43 | 13.44 | 11.21 | 50 | 41.54 | 33.97 | 27.90 | 23.30 | 19.85 | 17.22 | 14.30 | 60 | 51.86 | 43.03 | 35.25 | 29.25 | 24.77 | 21.38 | 17.66 |
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