AHP-FSE-Based Risk Assessment and Mitigation for Slurry Balancing Shield Tunnel Construction

Table 6

First-layer index scores.

Personnel risk	Mechanical risk	Material risk	Method risk	Environmental risk
Personnel risk	1	2	3	2	1/3
Mechanical risk	1/2	1	2	1/2	1/5
Material risk	1/3	1/2	1	1/3	1/6
Method risk	1/2	2	3	1	1/4
Environmental risk	3	5	6	4	1