Tunnel pipe shed welding connection device and method thereof

In order to solve the technical problems of insufficient strength, complicated processing and difficulty in installation of a pipe shed supporting joint, the invention designs a tunnel pipe shed welding connection device which comprises mother pipes and welding parts between the mother pipes, a first mother pipe and a second mother pipe which are adjacent are connected through the welding parts, each welding part includes an inner insertion pipe and a weld zone, the external diameter of the inner insertion pipe is smaller than or equal to the internal diameter of the mother pipe, and the weldzone is disposed between the first mother pipe and the second mother pipe the on-site manufacture is convenient, the cost is low, and the construction efficiency is high. Due to the adoption of the inner insertion pipe, steel pipe jointing in length basically can be naturally guided, which facilitates construction; since the joint does not increase the joint pipe diameter, the in-hole pipe arrangement construction difficu