Research on Design Parameters and Fatigue Life of Tunnel Bottom Structure of Single-Track Ballasted Heavy-Haul Railway Tunnel with 40-Ton Axle Load

Table 5

The vertical dynamic stress amplitude of measuring points 1, 2, and 3 under different invert thickness conditions.

Measuring point	Vertical dynamic stress amplitude of different invert thickness conditions (kPa)
	10 cm	15 cm	20 cm	30 cm
1	162.127	162.393	162.393	161.595
2	80.864	86.317	88.844	92.036
3	59.584	56.126	52.402	48.545