Mitigating Risk Hazards in Tunnels with Innovative Triangular Fiber-Reinforced Concrete Lining

Polypropylene is one of the advanced commercial applications that have a smooth-monofilament shape. Polypropylene fibres consume a unique property that is suitable for reinforcement in concrete. Polypropylene Triangular Polyester Fibre Reinforced Concrete (PTPFRC) has high strength concrete, that holds high tensile strength, higher elongation and low modulus of elasticity, low density, chemically inert, non-corrosive, toughness, and impact strength, as well as modified failure mode by increasing post-cracking ductility and cracks control. For use in FRC, a variety of fibre composites in different sizes and shapes have been developed. The study analyses and contrasts the properties of hardened concrete and polypropylene fibre-reinforced concrete mixes to see the axial force, shear force, and Bending Moment between normal and polypropylene fibre reinforced concrete specimens. Fibre-reinforced concrete, especially polypropylene fibre reinforced concrete, was rarely used as a supplementary lining in the underground structure. Many fibres reinforced concrete researchers are currently attempting to analyze tunnel lining behaviour in a static state, although fibre reinforced concrete offers more advantages in seismic vibration. The goal of this study is to see if polypropylene fibre reinforced concrete can be used as a tube tunnel to improve the strength of the tunnel. The comparison shows that ordinary concrete has two significant flaws: poor strength and low strain.