| Description | Properties | Values |
| Excavation | Top heading & benching |
|
| Provisional invert | Shotcrete thickness [mm] | 150 |
| Shotcrete (initial lining) | C25/30 thickness [mm] | 250 |
| Rock bolt (initial lining) | Self-Drilling anchors | R32N |
| Bolt axial stiffness [kN/m] | 1.15 * 105 | |
| Equivalent soil cluster for pipe umbrella | Thickness [mm] | 35 |
| Elasticity modulus E [MPa] | 16,600 | |
| Cohesion c [kPa] | 5000 | |
| Unit weight ɣ [kN/m3] | 24 | |
|
| Poisson’s ratio ν [-] | 0.25 |
| Final lining | Inner concrete lining c25/30 thickness [mm] | 300 |
| Surrounding soil property | c' [kPa] | 500 |
| Internal angle of friction ø’ [˚] | 25 | |
| E [MPa] | 250 | |
| Poisson’s ratio ν [−] | 0.25 | |
| Unit weight ɣ [kN/m3] | 24 |