High-performance sprayed concrete for subsea tunnel and construction application method of high-performance sprayed concrete

The invention relates to the technical field of tunnel construction, and particularly provides high-performance sprayed concrete for subsea tunnels and a construction application method thereof.The concrete is prepared from, by weight, 450-550 parts of slag powder, 0.5-1.0 part of fluosilicate, 4.5-5.5 parts of a water reducing agent, 0.05-0.1 part of an alkali swelling thickener, 20-50 parts of an exciting agent, 1500-1700 parts of filler and 150-220 parts of water; the exciting agent is water glass containing meta-aluminate. The sprayed concrete has the advantages of being fast in setting and hardening, high in supporting strength, low in spraying rebound rate, high in hydration product corrosion resistance and good in durability, the main raw materials come from industrial solid waste, and the sprayed concrete is environmentally friendly, so that deformation and sedimentation of tunnel surrounding rock are effectively controlled, and meanwhile the construction cost is reduced. And the method is of great si