Research Article
Engineering Geological Assessment of Diversion Tunnel of Bakhtiari Damsite (Biggest Two-Arch Concrete Dam in Southern Iran)
Table 3
Specification of the main discontinuities in diversion tunnel.
| | Discontinuity type | Roughness | Filling | Spacing (mm) |
| | | Rough (R) | 34% | Clean | 10% | ≤1 | 45% | | | Smooth (Sm) | 35% | Calcite-clay | 29% | 1–5 | 42% | | Bedding | Slicken Slid (Sl) | 26% | Calcite | 36% | 5–10 | 8% | | | Diverse | 5% | Clay | 20% | 10–50 | 5% | | | — | — | Diverse | 5% | Diverse | 0% |
| | | Total | 100% | Total | 100% | Total | 100% |
| | Main joint (J1) | Rough (R) | 86% | Clean | 5% | ≤1 | 4% | | Smooth (Sm) | 5% | Calcite-clay | 6% | 1–5 | 46% | | R-Sm | 5% | Calcite | 70% | 5–10 | 5% | | Slicken slid (Sl) | 4% | Clay | 14% | 10–50 | 4% | | Diverse | 0% | Iron oxide | 5% | >50 | 0% |
| | | Total | 100% | Total | 100% | Total | 100% |
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