Research Article
Analysis on Loose Circle of Surrounding Rock of Large Deformation Soft-Rock Tunnel
Table 7
Measured values of loose circles and surrounding rock pressures of typical section (m).
| | Cross section mileage | Test items | Hole location | | 1 | 2 | 3 | 4 |
| | DK234 + 205 | Loose circle (m) | 7∼7.5 | 6.5∼7 | 6.5∼7 | 7∼7.5 | | Surrounding rock pressure (kPa) | 304.7 | 259.3 | 241.2 | 288.4 |
| | DK234 + 318 | Loose circle (m) | 7.5∼8 | 7∼7.5 | 7∼7.5 | 7.5∼8 | | Surrounding rock pressure (kPa) | 322.6 | 279.1 | 251.3 | 307.7 |
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