🔧 1. What is shotcrete (for foundation support)?
Shotcrete is sprayed concrete applied at high velocity onto surfaces for soil stabilization, retaining walls, and foundation pits.
Typical use in foundations:
Excavation support (basement, deep foundation pits)
Slope stabilization around foundations
Temporary or permanent retaining walls
⚙️ 2. Wet vs Dry Shotcrete Machine
🟢 Wet Shotcrete Machine
Example: GYP-90D Wet Shotcrete Machine
Working principle
Pre-mixed concrete (with water) is pumped
Compressed air sprays it at the nozzle
Key features
Output: 3–9 m³/h
Lower dust, better working environment
High compaction and strength
Suitable for continuous spraying
Best for foundation support
Deep foundation pits
High-rise building basements
Permanent retaining structures
👉 Recommended when quality, strength, and productivity are critical
🟡 Dry Shotcrete Machine
Example: Dry/Wet Mix Shotcrete Machine GSP-D
Working principle
Dry mix is fed into machine
Water added at nozzle during spraying
Key features
Flexible and simple setup
Lower initial cost
More rebound and dust
Output around 7 m³/h
Best for foundation support
Small projects
Repair or local reinforcement
Sites with limited water supply
👉 Recommended when flexibility and low cost are more important than finish quality
🔄 3. Combined Wet/Dry Shotcrete Machine
Some machines support both modes:
One machine for dry + wet spraying
Flexible for different site conditions
Useful for contractors handling varied projects
Example:
GSP-D Dry/Wet Shotcrete Machine
Capacity ~7 m³/h
👉 Good choice for multi-purpose foundation and tunneling contractors
🏗️ 4. Recommendation for Building Foundation Support
| Project Type | Recommended Machine |
|---|---|
| Deep excavation / basement | Wet shotcrete |
| High-strength retaining wall | Wet shotcrete |
| Small foundation repair | Dry shotcrete |
| Mixed or variable jobs | Wet/Dry combined |
✅ 5. Practical Selection Tips
Choose wet shotcrete if:
You need high strength + low rebound
Continuous spraying is required
Choose dry shotcrete if:
Project is small or intermittent
Budget is limited
Choose dual machine if:
You work on both tunnel + foundation projects
If you want, we can recommend specific models based on your required capacity (m³/h), spraying height, or foundation depth.
