Research Article
Predictive Analysis of Settlement Risk in Tunnel Construction: A Bow-Tie-Bayesian Network Approach
Table 2
Classification of risk levels.
| Level | 1 | 2 | 3 | 4 | 5 |
| Description | Negligible | Alarming | Serious | Dangerous | Catastrophic | Surface settlement (mm) | 0–10 | 5–15 | 10–25 | 20–35 | 30–45 |
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