Freezing Damage Control of Railway Subgrade Miniature Shields in Cold Climatic Regions: Construction Technology Optimization via Numerical Simulation

Table 6

Effect of typical working conditions on settlement deformation of transmission line.

Segment type	Interval-to-pipe diameter ratio	Construction sequence	Construction condition	Maximum line settlement in shield center (mm)
Steel pipe	0	One side in the same direction	Condition 5	4.92
Steel pipe	2	From the sides to the middle	Condition 1	4.90
PE tube	2	One side in the same direction	Condition 12	6.0
PE tube	2	From the middle to the sides	Condition 4	6.3