Inversion Calculation Analysis of Operational Tunnel Structure Based on the Distributed Optical-Fiber Sensing System

Table 1

Contrast on regression model forecast with FEM calculation.

(GPa)	(MPa)	Error value (%)	Calculation result of finite element	Calculation result of regression model
			A
3.5	0.35
4.2	0.50
4.8	0.60
5.3	0.3
6.0	0.45
6.5	0.55
			B
3.5	0.35
4.2	0.50
4.8	0.60
5.3	0.3
6.0	0.45
6.5	0.55
			C
3.5	0.35
4.2	0.50
4.8	0.60
5.3	0.3
6.0	0.45
6.5	0.55
			D
3.5	0.35
4.2	0.50
4.8	0.60
5.3	0.3
6.0	0.45
6.5	0.55
			E
3.5	0.35
4.2	0.50
4.8	0.60
5.3	0.3
6.0	0.45
6.5	0.55
			F
3.5	0.35
4.2	0.50
4.8	0.60
5.3	0.3
6.0	0.45
6.5	0.55
			G
3.5	0.35
4.2	0.50
4.8	0.60
5.3	0.3
6.0	0.45
6.5	0.55
			H
3.5	0.35
4.2	0.50
4.8	0.60
5.3	0.3
6.0	0.45
6.5	0.55
			I
3.5	0.35
4.2	0.50
4.8	0.60
5.3	0.3
6.0	0.45
6.5	0.55