Research Article
Limit Analysis of Collapse Mechanisms for Tunnel Roofs Subjected to Pore Water Pressure: A Numerical Approach
Table 5
Parameters of Hoek–Brown failure criterion.
| | Equivalent Mohr envelope parameters in equation (1) | The generalized Hoek–Brown parameters in FLAC3D |
| | A | B | σc (kPa) | a | mb | s | σc (kPa) | GSI |
| | 0.65 | 5/6 | 3 × 104 | 0.5 | 4.5 | 0.02 | 3 × 104 | 65 |
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