Reliability Evaluation of Water-Rich Loess Tunnel with Lining Crack Based on Extension Theory

Table 3

Standardization values of the evaluation parameter.

Category	Item	Width	Depth	Length	Geometry	Water seepage
Tunnel section	K1	0.07	0.36	0.09	0.76	0.29
	K2	0.53	0.14	0.13	0.68	0.16
	K3	0.23	0.11	0.01	0.28	0.11
	K4	0.18	0.21	0.40	0.32	0.23
	K5	0.31	0.71	0.04	0.64	0.07
	K6	0.80	0.92	0.76	0.88	0.86
Reliability grade	I	0∼0. 04	0∼0.20	0∼0.10	0∼0.40	0∼0.09
	II	0.04∼0.20	0.20∼0.40	0.10∼0.23	0.40∼0.60	0.09∼0.19
	III	0.20∼0.60	0.40∼0.60	0.23∼0.49	0.60∼0.80	0.19∼0.49
	IV	0.60∼1.00	0.60∼1.00	0.49∼1.00	0.80∼1.00	0.49∼1.00