The needle beam trolley is a specialized full-circle steel formwork machine for concrete secondary lining in circular tunnels, especially for long-distance hydraulic diversion tunnels, with its unique needle-beam walking system enabling efficient, precise movement and positioning without relying on external rails.
>> Product Advantage
1. Efficient construction cycle, continuous pouring progress.
2. No ground rails needed, suitable for soft/muddy tunnel floors.
3. Fast cycle times (12–24 h per 10–12 m segment).
4. Sufficient stablility for high concrete pressure in deep tunnels.
5. Save construction space and low tunnel clearance requirements.
6. Reduce post-pouring finishing work, which significantly reduces the subsequent chiseling, repairing and polishing works.
>> Technical Parameters
Tunnel diameter | 3–12 m (customizable) |
Pour length | 10 m, 12 m (standard) |
Total length | 20m to 29M |
Total weight | 80–200+ tons depending on diameter and length |
Hydraulic pressure | 16–25 MPa; electric/hydraulic power pack |
Systmes | Equipped with traveling mechanism,guilding device, hydraulic system and hoisting system |
Color | with high quality anti-corrosion and rust-proof paintings. |
