Research Article
Freezing Damage Control of Railway Subgrade Miniature Shields in Cold Climatic Regions: Construction Technology Optimization via Numerical Simulation
Table 4
Construction conditions of different lateral directions and different directions.
| Segment material | Construction order | Construction condition |
| Steel pipe | From the sides to the middle | Condition 1 | Steel pipe | From the middle to the sides | Condition 2 | PE tube | From the sides to the middle | Condition 3 | PE tube | From the middle to the sides | Condition 4 |
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