Improved construction process for self-propelled pipe shed of three-arm drill jumbo

The invention discloses an improved construction process for a self-propelled pipe shed of a three-arm drill jumbo, which belongs to the technical field of construction of pipe sheds in tunnels and comprises the following steps: S1, arranging a guider at the end part of a propelling beam of the three-arm drill jumbo, and controlling the feeding direction of a drill rod by matching the guider with a rod clamping device; s2, a follow pipe and a drill rod are installed; s3, the end portion of the second end of the drill rod is connected with a center drill bit, the center drill bit is sleeved with a casing shoe, the casing shoe is connected with the follow pipe, the side, away from the follow pipe, of the casing shoe is connected with an annular drill bit, and the annular drill bit and the center drill bit are correspondingly provided with locking structures; and S4, through mutual cooperation of a center drill bit on the drill rod and an annular drill bit on the casing shoe, after drilling is conducted, the fol