Table 5 Cutting efficiency of two cutterheads
From: A New System to Evaluate Comprehensive Performance of Hard-Rock Tunnel Boring Machine Cutterheads
Cutterhead | Number of center cutter | Number of normal cutter | Number of gauge cutter | Cutting efficiency (J/m3) |
|---|---|---|---|---|
Robbins | 8 | 35 | 11 | 1.67 × 106 |
CRCC | 8 | 32 | 11 | 1.49 × 106 |