Risk Assessment of Shield Tunnel Construction in Karst Strata Based on Fuzzy Analytic Hierarchy Process and Cloud Model

Table 4

Scoring results of the experts on the first-level indices.

Assessment indices	Karst geological conditions	Hydrogeological conditions	Tunnel design	Shield construction
Karst geological conditions	(0.5, 0.5, 0.5)	(0.6, 0.7, 0.8)	(0.5, 0.6, 0.7)	(0.4, 0.5, 0.6)
		(0.6, 0.7, 0.8)	(0.4, 0.5, 0.6)	(0.3, 0.4, 0.5)
		(0.5, 0.6, 0.7)	(0.5, 0.6, 0.7)	(0.4, 0.5, 0.5)
Hydrogeological conditions	(0.2, 0.3, 0.4)	(0.5, 0.5, 0.5)	(0.4, 0.4, 0.5)	(0.3, 0.4, 0.5)
	(0.2, 0.3, 0.4)		(0.3, 0.4, 0.5)	(0.2, 0.3, 0.4)
	(0.3, 0.4, 0.5)		(0.4, 0.5, 0.5)	(0.2, 0.3, 0.4)
Tunnel design	(0.3, 0.4, 0.5)	(0.5, 0.6, 0.6)	(0.5, 0.5, 0.5)	(0.3, 0.4, 0.5)
	(0.4, 0.5, 0.6)	(0.5, 0.6, 0.7)		(0.3, 0.4, 0.5)
	(0.3, 0.4, 0.5)	(0.5, 0.5, 0.6)		(0.4, 0.5, 0.5)
Shield construction	(0.4, 0.5, 0.6)	(0.5, 0.6, 0.7)	(0.5, 0.6, 0.7)	(0.5, 0.5, 0.5)
	(0.5, 0.6, 0.7)	(0.6, 0.7, 0.8)	(0.5, 0.6, 0.7)
	(0.5, 0.5, 0.6)	(0.6, 0.7, 0.8)	(0.5, 0.5, 0.6)