Study on Disease Mechanism and Theoretical Quantification Method of Tunnel Structure

Table 13

The correlation degree of evaluation index on evaluation grade.

Evaluation index	K1 (level 1)	K2 (level 2)	K3 (level 3)	K4 (level 4)
C1	−1	−1	−1	0
C2	−1/3	0	0	−1/3
C3	0	0	−1/2	−2/3
C4	−2/3	−1/2	0	0
C5	−2/3	−1/2	0	0