A Novel Contact Tunnel Profile Monitoring System: Concept and Application

Table 4

Displacement direction angle of each measuring point at different times.

Measuring point	30 d			200 d			400 d			561 d
	(mm)	(mm)	(°)	(mm)	(mm)	(°)	(mm)	(mm)	(°)	(mm)	(mm)	(°)
1	3.514	0.148	2.41	4.683	0.344	4.20	4.802	0.532	6.32	4.914	0.645	7.48
2	1.496	0.611	22.22	2.174	1.324	31.34	2.339	1.766	37.05	2.425	1.820	36.89
3	0.281	0.907	72.79	0.408	1.940	78.12	0.431	2.587	80.54	0.445	2.716	80.70
4	1.521	0.565	20.38	2.318	1.192	27.21	2.439	1.587	33.05	2.546	1.701	33.75
5	3.064	0.040	0.75	4.183	0.268	3.67	4.280	0.453	6.04	4.393	0.536	6.96