Research Article
Assessment of Slope Instability and Risk Analysis of Road Cut Slopes in Lashotor Pass, Iran
Table 5
Adjustment factors
,
,
,
, and
and range of value in the SSR classification system (Taheri and Tani 2010) [
6].
| |
Parameter | Range of values | | | | |
| | Uniaxial compressive strength (MPa) | | 0–10 | 10–25 | 25–50 | 50–100 | 100–150 | 150–200 | Rating | | 0 | 7 | 18 | 28 | 37 | 43 |
| | Rock type | | Group 1 | Group 2 | Group 3 | Group 4 | Group 5 | Group 6 | Rating | | 0 | 4 | 9 | 17 | 20 | 25 |
| | Slope excavation method | | Waste damp | Poor blasting | Normal blasting | Smooth blasting | Presplitting | Natural slope | Rating | | −11 | −4 | 0 | 6 | 10 | 24 |
| | Groundwater | (Groundwater level from bottom of the slope/slope height) × 100 | Dry | 0–20% | 20–40% | 40–60% | 60–80% | 80–100% | Rating | | 0 | −1 | −3 | −6 | −14 | −18 |
| | Earthquake force | Horizontal acceleration | 0 | 0.15 g | 0.20 g | 0.25 g | 0.30 g | 0.35 g | Rating | | 0 | −11 | −15 | −19 | −22 | −26 |
|
|