Cross-section trade-off for the 2 km baseline tunnel at 350 km/h, single train: exterior load, sealing time constant required to satisfy all UIC comfort criteria and excavation-volume proxy
| A0 (m2) | β | Exterior Δppp (kPa) | Required τmin (s) | Excavation proxy (103 m3/km) | Change vs 100 m2 (excav./load/sealing) |
|---|---|---|---|---|---|
| 70 | 0.160 | 5.30 | 20.6 | 70 | −30%/+46%/+72% |
| 85 | 0.132 | 4.32 | 15.3 | 85 | −15%/+19%/+28% |
| 100 | 0.112 | 3.64 | 12.0 | 100 | reference |
| A0 (m2) | β | Exterior Δppp (kPa) | Required τmin (s) | Excavation proxy (103 m3/km) | Change vs 100 m2 (excav./load/sealing) |
|---|---|---|---|---|---|
| 70 | 0.160 | 5.30 | 20.6 | 70 | −30%/+46%/+72% |
| 85 | 0.132 | 4.32 | 15.3 | 85 | −15%/+19%/+28% |
| 100 | 0.112 | 3.64 | 12.0 | 100 | reference |
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