Research Article
Study on Identification of Construction Method for Ultra-Large-Span Tunnel
Table 4
Orthogonal test analysis.
| | No. | Excavation span | Surrounding rock strength | Coefficient of surrounding rock integrity | Code | | A | B | C |
| | 1 | 1 (6 m) | 1 (2 MPa) | 1 (0.1) | A1B1C1 | | 2 | 1 (6 m) | 2 (10 MPa) | 2 (0.2) | A1B2C2 | | 3 | 1 (6 m) | 3 (20 MPa) | 3 (0.4) | A1B3C3 | | 4 | 1 (6 m) | 4 (40 MPa) | 4 (0.6) | A1B4C4 | | 5 | 1 (6 m) | 5 (65 MPa) | 5 (0.75) | A1B5C5 | | 6 | 2 (9 m) | 1 (2 MPa) | 2 (0.2) | A2B1C2 | | 7 | 2 (9 m) | 2 (10 MPa) | 3 (0.4) | A2B2C3 | | 8 | 2 (9 m) | 3 (20 MPa) | 4 (0.6) | A2B3C4 | | 9 | 2 (9 m) | 4 (40 MPa) | 5 (0.75) | A2B4C5 | | 10 | 2 (9 m) | 5 (65 MPa) | 1 (0.1) | A2B5C1 | | 11 | 3 (12 m) | 1 (2 MPa) | 3 (0.4) | A3B1C3 | | 12 | 3 (12 m) | 2 (10 MPa) | 4 (0.6) | A3B2C4 | | 13 | 3 (12 m) | 3 (20 MPa) | 5 (0.75) | A3B3C5 | | 14 | 3 (12 m) | 4 (40 MPa) | 1 (0.1) | A3B4C1 | | 15 | 3 (12 m) | 5 (65 MPa) | 2 (0.2) | A3B5C2 | | 16 | 4 (15 m) | 1 (2 MPa) | 4 (0.6) | A4B1C4 | | 17 | 4 (15 m) | 2 (10 MPa) | 5 (0.75) | A4B2C5 | | 18 | 4 (15 m) | 3 (20 MPa) | 1 (0.1) | A4B3C1 | | 19 | 4 (15 m) | 4 (40 MPa) | 2 (0.2) | A4B4C2 | | 20 | 4 (15 m) | 5 (65 MPa) | 3 (0.4) | A4B5C3 | | 21 | 5 (18 m) | 1 (2 MPa) | 5 (0.75) | A5B1C5 | | 22 | 5 (18 m) | 2 (10 MPa) | 1 (0.1) | A5B2C1 | | 23 | 5 (18 m) | 3 (20 MPa) | 2 (0.2) | A5B3C2 | | 24 | 5 (18 m) | 4 (40 MPa) | 3 (0.4) | A5B4C3 | | 25 | 5 (18 m) | 5 (65 MPa) | 4 (0.6) | A5B5C4 |
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