The Tail Brush of a Tunnel Boring Machine (TBM) is a critical sealing component located at the rear of the shield (just before the segment erector area). It serves an important purpose in the TBM operation, especially in pressurized or water-bearing ground conditions.





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| Cutterhead |
|-------------------------|
| Shield Body |
|-------------------------|
| Segment Erection|
|-------------------------|
| TAIL BRUSH AREA| <-- Seals the shield to the segment lining
|-------------------------|
| Concrete Segment Lining
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