Here's an overview of its function, benefits, and application in tunnel spraying:
✅ What Is a Wet Shotcrete Machine?
A wet shotcrete machine sprays pre-mixed wet concrete through a high-pressure hose onto tunnel walls or ceilings. Unlike dry shotcrete (gunite), where water is added at the nozzle, wet shotcrete is already mixed with water and additives before pumping.
🔧 Main Components
Concrete pump: Delivers high-pressure wet mix
Nozzle system: Controls spray direction and spread
Air compressor: Assists in projecting material at high velocity
Robotic arm (optional): For precision spraying in large tunnels
🏗️ Applications in Tunnel Construction
Initial ground support after excavation
Lining the tunnel walls
Slope or crown stabilization
Final lining with reinforced mesh and fibers
🚧 Advantages of Wet Shotcrete in Tunnels
✔️ Faster application and high productivity
✔️ Lower dust levels – better for health and visibility
✔️ Better adhesion and uniformity
✔️ Can be used with robotic arms for deep or curved tunnels
✔️ Compatible with steel mesh/fiber reinforcement
If you're selecting a machine, let me know:
The tunnel size
Desired spray thickness
Need for robotic arm or manual
Power supply conditions
I can recommend suitable models or specifications accordingly.
