Numerical Analysis of Vibration Responses in High-Speed Railways considering Mud Pumping Defect

Table 2

Thresholds of vibration responses in high-speed railways and the limited length of mud pumping.

Items	Thresholds	Limited length of mud pumping (m)
Reduction ratio of the wheel load	0.65	>6.3
Wheel-rail contact force	170 kN	>6.3
Vertical displacement of the rail	2 mm	5.23
Vertical displacement of the slab	0.3 mm	2
Vertical acceleration of the slab	300 m/s^2	>6.3
Vertical displacement of the upper layer of subgrade bed	0.22 mm	>6.3
Vertical acceleration of the upper layer of subgrade bed	10 m/s^2	>6.3
Vertical velocity of the upper layer of subgrade bed	12 mm/s	>6.3
Suggested value		2