Need. In winter, the second lining of high-speed railway tunnel needs to be cured by sprinkling water, and the surface of the second lining concrete is covered or sprayed with film curing liquid, so the curing measures of the second lining concrete are generally spraying and sprinkling water. The secondary lining ensures the permanent stability, safety and beauty of the operating tunnel, and is also an engineering measure as a safety reserve. According to the NATM principle, tunnels built by surrounding rocks with good geological conditions are in the early stage.