Table 2 Important technical parameters of the 10.22 m diameter shield
From: Use of a 10.22 m diameter EPB shield: a case study in Beijing subway construction
Items | Parameters |
|---|---|
Excavation diameter (mm) | 10,220 |
External diameter (mm) | 10,000 |
Internal diameter (mm) | 9000 |
Segment thickness (mm) | 500 |
Segment ring width (mm) | 1800 |
Configuration of segments | 9 (8 + 1 keystone) |
Machine length (mm) | 11550 |
Cutterhead rotation speed (r/min) | 0–0.68 |
Advance rate (mm/min) | 0–85 |
Total thrust (kN) | 108,000 |
Maximum torque coefficient (α) | α = 32.2 |
Working torque (kN m) | 22,896–34,344 |