Step-by-Step Calculation
1. Shotcrete Volume Per Meter of Tunnel
Example Tunnel Dimensions:
Width: 6 meters
Height: 5 meters
Shotcrete layer thickness: 5 cm (0.05 m)
Tunnel surface area per meter:
Perimeter = (6 + 5) × 2 = 22 meters
Surface area = 22 × 1 = 22 m²
Shotcrete volume per meter = 22 × 0.05 = 1.1 m³
2. Tunnel Length Covered Per Hour
Machine capacity = 30 m³/h
Tunnel length covered per hour = 30 ÷ 1.1 ≈ 27 meters per hour
3. Tunnel Length Covered Per Day (8-hour shift)
27 meters/hour × 8 hours = 216 meters per day
4. Total Length Covered (based on total shotcrete requirement)
If the total shotcrete required is known (e.g., 3,000 m³), then:
3,000 ÷ 30 = 100 hours of spraying
At 8 hours/day → 12-13 working days
At 216 meters/day → ~2,500-3,000 meters of tunnel length
Final Answer:
A 30 m³/h wet shotcrete machine can typically cover 200-250 meters of tunnel per day and handle several kilometers of tunnel over weeks of operation, depending on project requirements.
Would you like me to adjust calculations for a specific tunnel size or project duration?
