Research Article
Evaluation of Ground Surface Pregrouting in a Mountain Tunnel Based on FAHP
Table 7
Increase rate of the unconfined compressive strength of the rock samples before and after grouting.
| Number of rock samples | Before grouting (MPa) | After grouting (MPa) | Increase rate of unconfined compressive strength of the rock samples (%) |
| P1-1 | 10.5 | 12.3 | 17.1 | J1-2 | 13.5 | 15.3 | 13.3 | P2-1 | 19.2 | 21.2 | 10.4 | J2-2 | 21.7 | 23.4 | 7.8 | P3-1 | 15.3 | 17.1 | 11.8 | J3-2 | 14.1 | 16.3 | 15.6 | P4-1 | 13.2 | 15.6 | 18.2 | J4-2 | 18.3 | 20.6 | 12.6 | P5-1 | 17.1 | 19.4 | 13.5 | J5-2 | 18.7 | 20.3 | 8.6 |
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