Shaft verticality — Lift Shaft 1 (south-west)
Global alignment against the project's fixed design coordinate system. The measured centreline is never used to redefine the design; cumulative movement therefore remains visible.
LONG-TERM DRIFT DETECTED
Gradual eastward (+X) drift over the previous 5 completed sections. Current global X deviation: 7.1 mm. Average recent change: +1.4 mm per section. Projected X deviation five sections ahead: 14.0 mm — a projection from recent trend only, not a guaranteed outcome.
Total horizontal deviation vs height
X and Y deviation vs height
Pitch and roll vs height
Yaw vs height
Completed sections
| Section | Level | Height | ΔX | ΔY | Horizontal | Pitch | Roll | Yaw | Result |
|---|---|---|---|---|---|---|---|---|---|
| 1 | L03 | 2,000 mm | 0.4 | -0.6 | 0.7 mm | 0.004° | -0.003° | 0.010° | WITHIN CONFIGURED TOLERANCE |
| 2 | L04 | 5,150 mm | 1.6 | -0.9 | 1.8 mm | 0.006° | -0.005° | 0.020° | WITHIN CONFIGURED TOLERANCE |
| 3 | L05 | 8,300 mm | 2.9 | -1.1 | 3.1 mm | 0.009° | -0.004° | 0.030° | WITHIN CONFIGURED TOLERANCE |
| 4 | L06 | 11,450 mm | 4.2 | -1.4 | 4.4 mm | 0.011° | -0.006° | 0.040° | WITHIN CONFIGURED TOLERANCE |
| 5 | L07 | 14,600 mm | 5.6 | -1.2 | 5.7 mm | 0.012° | -0.007° | 0.050° | WITHIN CONFIGURED TOLERANCE |
| 6 | L08 | 17,750 mm | 7.1 | -1.5 | 7.3 mm | 0.014° | -0.005° | 0.060° | REVIEW REQUIRED |