Study on the Intelligent Evaluation System of Tunnel Frost Damage in Cold Regions Based on the Fuzzy Comprehensive Evaluation Model

Table 8

Weight relationship between criterion level and index level.

Criteria layer	Weight	Index layer	Weight	Target weight
U1 (temperature condition)	0.29	Temperature outside the tunnel	0.1	0.029
		Ground temperature of the surrounding rock	0.4	0.116
		Driving density	0.3	0.087
		Wind speed in the tunnel	0.2	0.058
U2 (hydrological condition)	0.29	Void area length of the surrounding rock between lining	0.49	0.1421
		Annual precipitation	0.10	0.029
		Blockage rate of the drain pipe	0.25	0.0725
		Waterproof design of three seams	0.16	0.0464
U3 (surrounding rock condition)	0.13	Buried depth	0.08	0.0104
		Fracture rate of the surrounding rock	0.38	0.0494
		Lining strength	0.23	0.0299
		Dissolution and invasion of the surrounding rock	0.31	0.0403
U4 (engineering measure condition)	0.29	Design issues	0.23	0.0667
		Construction issues	0.53	0.1537
		Operation and maintenance problems	0.18	0.0522
		Remedial measures	0.06	0.0174