Study on Disease Mechanism and Theoretical Quantification Method of Tunnel Structure

Table 5

Standard for evaluation of lining section deterioration and peeling.

Structure	Main reason	Peeling possibility		Degree of deterioration			Status value
		Have	No	<1/2	1/2–2/3	>2/3
Arch	Deterioration, freezing damage, improper design, construction, etc.	✓					4
			✓				1
				✓			3
					✓		2
						✓	1
Sidewall		✓					3
			✓				1
				✓			3
					✓		2
						✓	1