Dynamic Response Characteristics of the Structures under Excavation by High-Efficiency Blasting in the Urban Ultradeep Foundation Pit

Table 2

The PPV and main frequency of the on-site monitored data.

Position	Distance (m)	Group number	Horizontal radial (X)		Horizontal tangential (Y)		Vertical (Z)
			PPV (cm/s)	Main frequency (Hz)	PPV (cm/s)	Main frequency (Hz)	PPV (cm/s)	Main frequency (Hz)
Residence	35	1	0.169	21.27	0.182	13.69	0.033	10.63
		2	0.201		0.203		0.041
		3	0.196		0.164		0.032
		4	0.210		0.171		0.035
Supporting pile	15	1	0.189	18.35	0.130	15.32	0.022	6.72
		2	0.195		0.148		0.028
		3	0.170		0.116		0.027
		4	0.186		0.126		0.029