As a core area of modern transportation, water conservancy and underground space development, tunnel engineering has extremely high requirements for construction efficiency, safety and engineering quality. With its unique technical characteristics, concrete wet shotcrete spraying machine has gradually replaced dry shotcrete machine and become an indispensable key equipment in tunnel construction.
1. Application in tunnel engineering:
1) Initial support and permanent lining
After tunnel excavation, the concrete wet shotcrete spraying machine can quickly spray concrete onto the tunnel wall to form an initial support layer, effectively controlling the deformation and collapse risk of the surrounding rock. At the same time, sprayed concrete can also be used as part of the permanent lining to improve the overall strength and durability of the structure.
2) Reinforcement under complex geological conditions
For complex geological conditions such as weak surrounding rock and fault fracture zones, the wet spraying machine can flexibly adjust the concrete ratio (such as adding accelerators) to quickly form a high-strength support layer to ensure construction safety.
3) Repair and reinforcement of tunnel inner walls
For crack repair or structural reinforcement of existing tunnels, the wet spraying machine can restore structural integrity by locally spraying concrete to reduce interference with traffic or operations.
4) Synchronous anchor support combined with construction
The concrete wet shotcrete spraying machine is often used in conjunction with anchor support technology. First, concrete is sprayed to seal the rock surface, and then anchors are installed to form a "spraying and anchoring combined support" system, which significantly improves the stability of the tunnel.
2. Advantages in tunnel engineering:
1) High construction efficiency and time saving
Automated operation, the concrete wet shotcrete spraying machine can operate continuously, meeting the needs of 24-hour uninterrupted construction of tunnel projects.
2) Excellent spraying quality and more reliable structure
The uniformity is greatly improved compared with dry shotcrete spraying machines, and the density is high.
3) Significantly improved safety
Reduce the exposure time of surrounding rocks, improve the working environment, the wet spraying process has low dust concentration (≤10 mg/m³), low noise, and protects the health of workers.
4) Economic and environmental protection coexist
High material utilization rate and green construction.
Structure of Concrete Wet Shotcrete Spraying Machine
