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Risk indicators and ranking table based on instrument monitoring data (F).
| Indicators | Risk level | ||||
|---|---|---|---|---|---|
| Level I | Level II | Level III | Level IV | ||
| Surface settlement (F1) | Cumulative value (F11) | 0 < K < 0.6 | 0.6 < K < 0.8 | 0.8 < K < 1 | 1 < K < 1.2 |
| Rate of change (F12) | |||||
| Groundwater level (F2) | Cumulative value (F21) | ||||
| Rate of change (F22) | |||||
| Horizontal displacement of wall top (F3) | Cumulative value (F31) | ||||
| Rate of change (F32) | |||||
| Vertical displacement of column (F4) | Cumulative value (F41) | ||||
| Rate of change (F42) | |||||
