A Method for Cavity Scale Estimation Based on Ground-Penetrating Radar (GPR) Explorations: An Experimental Study

Table 6

Calculation results of the scale ratio.

Soil type	Cavity no.	Soil depth (m)	Cavity scale (longitudinal section = cross section) (m)	Cavity height (m)	Scale ratio (identified cavity/predicted Cavity)
					Soil depth (%)	Longitudinal section (%)	Cross section (%)
SM	#5	0.6	1.0	0.5	95	69	67
	#12	0.6			111	65	67
	#13	0.9			107	57	56
SP	#1	0.3	0.5	0.25	115	60	63
	#11	0.3			94	58	56
	#6	0.3	1.0	0.5	94	77	77
	#15	0.3			107	82	77
	#2	0.6	0.5	0.25	111	49	45
	#7	0.6	1.0	0.5	94	63	63
	#16	0.6			102	66	67