Study on Structural Service Performance of Heavy-Haul Railway Tunnel with Voided Base

Table 5

Peak value of vertical displacement and velocity (in the case of void width of 12 m).

Void conditions	Void dimensions		Peak value of displacement (cm)	Peak value of velocity (cm/s)
	Void width (m)	Void thickness (cm)
Void	12	15	−4.2	−12.6
Void	12	20	−4.3	−12.8
Void	12	25	−4.3	−12.9