Research Article
Engineering Geological Assessment of Diversion Tunnel of Bakhtiari Damsite (Biggest Two-Arch Concrete Dam in Southern Iran)
Table 11
Estimation of the rock-support systems for the upper diversion tunnel based on
-support chart [
10].
| Rock masses of different geological units | | Proposed | Rock | Support | untensioned rock bolt (fully grouted) | Shotcrete | Steel Rib |
| SV2 | 14 | 3 m rock bolts at 2.4 m spacing | Systematic bolting | No need | SV3 | 15 | 3 m rock bolts at 2.4 m spacing | Systematic bolting | No need | SV3 Dis | 11 | 3 m rock bolts at 2.3 m spacing | Systematic bolting with 40 mm unreinforced shotcrete | No need | SV2 and SV3 | 10 | 3 m rock bolts at 2.3 m spacing | Systematic bolting with 40 mm unreinforced shotcrete | No need | SV4 | 15 | 3 m rock bolts at 2.4 m spacing | Systematic bolting | No need | SV5 | 35 | 3 m rock bolts at 3 m spacing | Spot bolting | | SV6 | 14 | 3 m rock bolts at 2.4 m spacing | Systematic bolting | No need | SV5 and SV6 Dis | 11 | 3 m rock bolts at 2.3 m spacing | Systematic bolting with 40 mm unreinforced shotcrete | No need | SV7 | 12 | 3 m rock bolts at 2.3 m spacing | Systematic bolting with 40 mm unreinforced shotcrete | No need | F2 fault zone | 10 | 3 m rock bolts at 2.3 m spacing | Systematic bolting with 40 mm unreinforced shotcrete | No need |
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