Intelligent mechanical arm for tunnel primary support flatness control

The invention discloses an intelligent mechanical arm for tunnel primary support flatness control, which is characterized in that a flatness wet nozzle assembly forms an annular moving semi-circle laminated concrete wet spraying structure on a tunnel primary support flatness wet spraying arm assembly; according to the tunnel primary support flatness wet spraying arm assembly, a speed follow-up type transverse concrete wet spraying annular movable arm structure is formed on the intelligent motor driving arm base assembly, when concrete wet spraying leveling is conducted, the flatness wet spraying nozzle assembly is of a linear motion and annular motion structure, and in this way, in the reciprocating motion, when wet spraying is conducted, the speed follow-up type transverse concrete wet spraying annular movable arm structure is formed; the next circle of concrete can partially cover the previous circle of concrete, semi-circle lamination type concrete wet spraying leveling is achieved, in this way, the qualit