Research Article
Evaluation of Ground Surface Pregrouting in a Mountain Tunnel Based on FAHP
Table 6
Permeability rate and curve types obtained from the five pairs of the test holes.
| Depth (m) | Before or after grouting | Number of boreholes | 1 | 2 | 3 | 4 | 5 |
| 0–7 | Before | 53.97/D | 50.91/D | 65.61/D | 62.13/D | 53.78/B | After | 4.90/A | 5.12/A | 4.69/B | 4.67/B | 4.72/A | 7–13 | Before | 47.12/D | 45.50/D | 42.00/D | 41.18/D | 46.21/C | After | 4.31/A | 4.26/B | 4.81/C | 5.18/D | 4.33/A | 13–20 | Before | 34.42/C | 30.36/D | 36.16/D | 41.10/D | 36.19/A | After | 3.44/A | 3.69/A | 3.21/A | 3.96/B | 3.15/A |
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Note: the unit of the permeability rate is Lu.
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