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

Table 8

Single-factor evaluation results.

Factors	Risk level
	Large	Relatively large	Normal	Relatively small	Small
Working experience	0	0.4	0.15	0.2	0.25
Safety skills	0	0	0	0.3	0.7
Emergency capacity	0	0.1	0.25	0.15	0.5
Safety consciousness	0.3	0.3	0.1	0.15	0.15
Working strength	0	0	0.4	0.3	0.3
Physical health	0	0	0.1	0.25	0.65
Sense of discipline	0	0	0.15	0.35	0.5
Working pressure	0.3	0.2	0.15	0.1	0.25
Mechanical failure condition	0	0	0.15	0.3	0.55
Mechanical aging condition	0	0.05	0.1	0.45	0.4
Mechanical wear condition	0	0	0.2	0.5	0.3
Qualification rate of installation	0	0	0	0.35	0.65
Qualification rate of maintenance	0	0	0	0.25	0.75
Physical property	0	0	0	0.35	0.65
Dimensional discrepancy	0.05	0.1	0.4	0.25	0.2
Storage conditions	0	0.05	0.2	0.25	0.5
Stacking condition	0.1	0.15	0.5	0.1	0.15
Integrity degree	0	0	0.25	0.3	0.45
Executive capacity	0.05	0.1	0.2	0.2	0.45
Implementation effect	0	0.05	0.05	0.3	0.6
Working method	0	0	0.1	0.35	0.55
Drawings change	0	0	0	0.25	0.75
Geological conditions	0.25	0.3	0.1	0.2	0.15
Geological disaster situation	0	0	0	0.05	0.95
Surrounding traffic conditions	0	0	0.05	0.15	0.8
Settlement level of surrounding buildings	0	0	0	0.05	0.95
Underground pipeline relocation	0	0.05	0.1	0.4	0.45
Safety facilities	0.25	0.25	0.15	0.2	0.15
Water pollution	0	0.05	0.15	0.45	0.35