The main feature of tunnel concrete wet spraying trolley is high production efficiency. The amount of sprayed concrete can reach 30 cubic meters per hour. The rebound rate is low. During dry spraying, the rebound of concrete reaches 15%-50%. Wet spraying technology has low spray rebound rate, and the spray rebound rate is controlled within the range of 15%. The spraying effect is good. The concrete operated by wet spraying trolley is transported to the site by centralized mixing tank car in the mixing station, and the water cement ratio is within the control range, which ensures the quality of the used concrete, thus ensuring the quality of the initial supporting structure and the strength and density of the supporting concrete at the initial stage of forming.

The wet spraying trolley is operated by wireless remote control, which has a high degree of mechanization, reduces the labor degree of operators, has accurate throttle following system and automatic spraying function, and is simple and convenient to operate.