Vibration and Long-Term Performance Analysis of Pile-Plank-Supported Low Subgrade of Ballastless Track under Excitation Loads

Table 1

Loading indices of frequency sweeping test.

Vibration exciter weight (kN)	Vibration frequency (Hz)	Maximum excitation force (kN)
134.22	5	2.58
	7	5.06
	9	8.36
	11	12.48
	13	17.43
	15	23.21
	17	29.81
	19	37.23
	21	45.48
	23	54.56
	25	64.46