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Basic data of the tunnels.
| Tunnel section | Annual average air temperature/(℃) | Annual temperature amplitude/(℃) | Water content /(%) |
Freezing depth /(m) |
|---|---|---|---|---|
| Dongtianshan Tunnel | 10.75 | 25 | 30 | 1.36 |
| Qingshashan Tunnel | 5.9 | 15 | 28 | 1.25 |
| Alatan Tunnel | 0.7 | 13.2 | 15 | 1.65 |
