Safety Distance of Shotcrete Subjected to Blasting Vibration in Large-Span High-Speed Railway Tunnels

Table 2

One set of monitoring data.

Test ID (date)		Monitoring point	R (m)	f (Hz)	PPV-X (mm/s)	PPV-Y (mm/s)	PPV-Z (mm/s)	Q (kg)
170671 (2017/6/3)	−0.05	-I	44.2	101	0.24	0.38	0.45	120
		-I	41		—	—	0.82
		-I	51.2		0.24	0.62	0.56
		-I	44.5		—	—	0.68
		-I	37.6		0.53	0.56	0.8
		-I	38.2		—	—	0.91
		-II	73.1		0.10	0.22	0.23
		-II	40		—	—	0.85
		-II	73.3		0.11	0.27	0.26
		-II	68.3		—	—	0.32
		-II	64.8		0.14	0.13	0.28
		-II	64.1		—	—	0.36