Key Requirements for Tunnel Support Pump
For use in a tunnel (or underground), the pump must meet some special requirements due to restricted space, safety, and the nature of concrete placement. Here's what to check:
| Parameter | Why It Matters in Tunnels |
|---|---|
| Output (m³/h) | Determines how fast you can place concrete. 60 m³/h is moderate; enough for many tunnel lining tasks but you'll need continuous supply. |
| Pump Pressure (MPa) | Must overcome the friction loss in pipes, bends, vertical lifts, and any head from the tunnel's elevation. Higher pressure helps, especially for long or vertical pipe runs. |
| Hose / Pipeline diameter & length | Smaller diameter or longer hose increases resistance. You'll need thicker pipelines or short hose runs, and more powerful pump, or accept slower flow. |
| Power source (diesel / electric) | Tunnels may have constraints: ventilation, emissions (diesel exhaust), electric power supply. Choose accordingly. |
| Mobility / Size / Access | Tunnel portals, curves, confined space-all constrain truck size, boom reach, maneuverability. Sometimes trailer or portable pumps are better than full boom trucks. |
| Wear resistance | Concrete with aggregates, abrasives, and coarse material (if used) will wear out pipes, valves. Materials of wear parts and maintenance are key. |
| Slump / Workability | Concrete mix must be pumpable; slump and aggregate size must be compatible with the pump system and pipe / fitting sizes. |
