This days Shotcrete at Launching Chamber is in progress as hard rock was encounter during the excavation of it has been terminated 3m to 4m above formation level, so here comes wire mesh, shotcrete & rock bolting to secure the excavated face.
We don’t have much scope of Shotcrete in, our project we will be doing dry Shotcrete.
The sequence of the work as follows.
- All material including water will be thoroughly mixed and will be placed on the shotcrete equipment.
- Compressed air will convey material at high velocity to the nozzle where the water and accelerators will be added.
- Finally, the material will be consolidated on the excavated surface by high impact velocity.