Behavior and Control of the Ballastless Track-Subgrade Vibration Induced by High-Speed Trains Moving on the Subgrade Bed with Mud Pumping

Table 4

The vertical vibration acceleration of the ballastless track-subgrade without mud pumping and after mud pumping reinforcement.

Testing content		Vertical vibration acceleration (m/s^2)
		The ballastless track-subgrade without mud pumping			The ballastless track-subgrade after mud pumping reinforcement
Location (upper to lower)		Track slab	Concrete base	Subgrade surface	Track slab	Concrete base	Subgrade surface
Train moving speed (km/h)	250	4.38	1.17	0.87	4.52	1.65	0.85
	280	4.55	1.34	0.79	4.78	1.82	1.01
	283	4.86	1.39	0.98	5.05	2.38	1.14