|
| Target layer | First layer | Second layer | Third layer |
|
| Risk of slurry shield construction | Personnel risk (A) | Professional skills and experience (A1) | Working experience (A11) |
| Safety skills (A12) |
| Emergency capacity (A13) |
| Safety consciousness (A14) |
| Physical condition (A2) | Working strength (A21) |
| Physical health (A22) |
| Mental health status (A3) | Sense of discipline (A31) |
| Working pressure (A32) |
| Mechanical risk (B) | Mechanical use status (B1) | Mechanical failure condition (B11) |
| Mechanical aging condition (B12) |
| Mechanical wear condition (B13) |
| Mechanical qualification status (B2) | Qualification rate of installation (B21) |
| Qualification rate of maintenance (B22) |
| Material risk (C) | Material quality status (C1) | Physical property (C11) |
| Dimensional discrepancy (C12) |
| Material storage status (C2) | Storage conditions (C21) |
| Stacking condition (C22) |
| Method risk (D) | Security system (D1) | Integrity degree (D11) |
| Executive capacity (D12) |
| Implementation effect (D13) |
| Construction schemes (D2) | Working method (D21) |
| Drawings change (D22) |
| Environmental risk (E) | Geological environment (E1) | Geological conditions (E11) |
| Geological disaster situation (E12) |
| Social environment (E2) | Surrounding traffic conditions (E21) |
| Settlement level of surrounding buildings (E22) |
| Underground pipeline relocation (E23) |
| Site environment (E3) | Safety facilities (E31) |
| Water pollution (E32) |
|
