Research Article
Freezing Damage Control of Railway Subgrade Miniature Shields in Cold Climatic Regions: Construction Technology Optimization via Numerical Simulation
Table 5
Construction conditions with different pipe diameter intervals.
| Segment material | Interval-to-pipe diameter ratio | Construction sequence | Construction condition |
| Steel pipe | 0 | One side in the same direction | Condition 5 | Steel pipe | 1 | Ditto | Condition 6 | Steel pipe | 2 | Ditto | Condition 7 | Steel pipe | 3 | Ditto | Condition 8 | Steel pipe | 4 | Ditto | Condition 9 | PE tube | 0 | Ditto | Condition 10 | PE tube | 1 | Ditto | Condition 11 | PE tube | 2 | Ditto | Condition 12 | PE tube | 3 | Ditto | Condition 13 | PE tube | 4 | Ditto | Condition 14 |
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