Research Article
Analysis on Loose Circle of Surrounding Rock of Large Deformation Soft-Rock Tunnel
Table 5
Calculation table of surrounding rock pressure.
| | Cross section mileage | Large deformation grade | Area | Buried depth h (m) | Excavation height Ht (m) | Lateral pressure coefficient | Influence coefficient of intermediate principal stress | Initial in situ stress P(kPa) | Surrounding rock pressure P(kPa) |
| | DK234 + 205 | II-grade | Vault | 200 | 13.99 | 1.2 | 0.168 | 4400 | 321.552 | | Side wall | 5280 | 385.682 |
| | DK234 + 318 | III-grade | Vault | 250 | 13.99 | 1.2 | 0.171 | 5500 | 321.552 | | Side wall | 6600 | 385.682 |
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