Dynamic Risk Assessment of Karst Tunnel Collapse Based on Fuzzy-AHP: A Case Study of the LianHuaShan Tunnel, China

Table 14

New questionnaire for dynamic risk assessment of karst tunnel collapse (layer 1).

Expert’s professional title	Senior titles	Intermediate titles	Junior titles
Layer 1
Calibration rule	Please use Saaty relative scale method for scoring
Quantitative results of relative importance between factor 1 to factor i
Calibration	Meaning	Calibration	Meaning
a1i = 1	Same importance
a1i = 3	Slightly more importance	a1i = 1/3	Slightly less importance
a1i = 5	Significantly more importance	a1i = 1/5	Significantly less importance
a1i = 7	Intensively more importance	a1i = 1/7	Intensively less importance
a1i = 9	Extremely more importance	a1i = 1/9	Extremely less importance
a1i = 2, 4, 6, 8	Represents the median value of the adjacent judgment	a1i = 1/2, 1/4, 1/6, and 1/8	Represents the median value of the adjacent judgment
If the ratio of element i and element j is aij, then the ratio of element j to element i is aji = 1/aij
	a12	a13	a14
Calibration
Calibration rule	Please use the three-scale method for scoring
Qualitative evaluate	a23	(i) More important
		(ii) Same important
		(iii) Less important
Relative importance	a24	(i) More important
		(ii) Same important
		(iii) Less important
Between factor i to factor j	a34	(i) More important
		(ii) Same important
		(iii) Less important