Numerical Analysis for Dynamic Response of In Situ Blasting Expansion of Large Cross-Section Tunnel with Small Net Distance

Table 2

Control thresholds of the blasting vibration velocity for some tunnels with small net distance.

Project	Net distance (m)	Threshold of vibration velocity (cm·s^−1)
Zhaobaoshan Highway Tunnel	0.95	10
Xiaoyangshan Tunnel	9.34	10
Bantao Tunnel	6.14	1.8
Wutong Mountain Tunnel	13.5	6
Sanfu Expressway Tunnel	5	10
Dongjiashan Tunnel	3.75	15
Shishi Tunnel	8.2	15