Evaluation of Ground Surface Pregrouting in a Mountain Tunnel Based on FAHP

Table 1

Nine-scaling method [16, 22].

Values	Equal importance with regard to the two indices
1	The two indices are equally important
3	The former is slightly more important than the latter
5	The former is more important than the latter
7	The former is much more important than the latter
9	The former is considerably more important than the latter
2,4,6,8	Intermediate values are used to reflect fuzzy inputs
Reciprocal	The dominance of the second alternative is reflected compared with the first, aji = 1/aij

Note: Table 1 is reproduced from Xu et al. (2019) [22].