Research Article
Study on Identification of Construction Method for Ultra-Large-Span Tunnel
Table 2
Parameter values of each level of factor C.
| Level | Number of joint planes | Space of joint plane | Joint inclination angle (°) | Coefficient of surrounding rock integrity |
| 1 | 4 | 0.2 | 0/90/45/135 | 0.1 | 2 | 3 | 0.3 | 0/90/45 | 0.2 | 3 | 2 | 0.4 | 0/90 | 0.4 | 4 | 2 | 0.8 | 0/90 | 0.6 | 5 | 2 | 1.5 | 0/90 | 0.75 |
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