Open Access
Table 4
Monitoring of warning, alarm and control values
| Monitoring items | Control standard | ||
|---|---|---|---|
| Warning threshold of cumulative value | Alarm threshold of cumulative value | Control value | |
| Vertical displacement of subgrade/mm | ±6.0 | ±8.0 | ±10.0 |
| Horizontal displacement of subgrade/mm | ±4.2 | ±5.6 | ±7.0 |
| Vertical displacement of catenary column/mm | ±3.0 | ±4.0 | ±5.0 |
| Horizontal displacement of catenary column (tilt)/% | 0.3 | 0.4 | 0.5 |
| Track vertical displacement/mm | +1.8 –4.8 |
+2.4 –6.4 |
+3.0 –8.0 |
| Horizontal displacement of track/mm | ±4.2 | ±5.6 | ±7.0 |
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