Application of Steel Fiber in Tunnels
Steel fibers have the following main applications in the field of tunnels:
1. Single layer sprayed concrete lining
2. Spray concrete primary support
3. Secondary lining of molded concrete and pipe segments
The sprayed layer of steel fiber shotcrete can effectively absorb energy from rock displacement, enabling fast and safe construction processes. It has high strength and clear load capacity, as well as good ductility, energy absorption, crack resistance, impact resistance, and durability.
Steel fiber reinforced concrete pipe segments are mainly used for tunnel support, including subway, railway, water conservancy, and urban comprehensive pipe gallery projects. Due to the uniform distribution of steel fibers, effective reinforcement can be formed at the joints and corners of the pipe segments. The reinforcement of steel fibers on pipe segments is integral and can resist stress in different directions, especially suitable for complex stress situations of pipe segments, reducing the damage rate during transportation and installation.
