Research Article
Analysis of External Water Pressure for a Tunnel in Fractured Rocks
Table 2
Geometrical parameters of the fractures.
| Probability parameters | Geometrical parameters | Strike angle (°) | Dip direction angle (°) | Dip angle (°) | Distance (m) | Broken zone (m) |
| Mean value | | | | | | NE | 50.4 | 140.4 | 69.6 | 123.9 | 1.03 | NW | 313.3 | 223.3 | 75.2 | 145.4 | 1.27 | Standard deviation | | | | | | NE | 11.92 | 11.92 | 7.45 | 67.83 | 0.9 | NW | 9.76 | 9.76 | 8.63 | 84.12 | 1.07 | Distribution form | | | | | | NE | Normal distribution | Normal distribution | Normal distribution | Negative exponent | Negative exponent | NW | Normal distribution | Normal distribution | Normal distribution | Negative exponent | Negative exponent |
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