Nodular cast iron pipe jacking pipe and manufacturing method thereof

The invention discloses a nodular cast iron pipe jacking pipe and a manufacturing method of the nodular cast iron pipe jacking pipe. The top pipe comprises a nodular cast iron pipe, a jacking pipe die, a sealing flange, concrete, a steel wire mesh, a connecting piece and a socket steel ring. The manufacturing method disclosed by the invention comprises the following steps of welding the nodular cast iron pipe, the connecting piece and the steel wire mesh together mutually by adopting an automatic welding technology of carbon dioxide arc welding, and then putting into the jacking pipe die; pouring into the concrete, carrying out steam curing, then installing the socket steel ring and welding the socket steel ring onto the connecting piece; after paint is sprayed, putting plastic adhesive tapes on two ends of a jacking pipe socket, slotting in the middle of each adhesive tape, and firmly fastening in the slots through packing steel strips. According to the manufacturing method disclosed by the invention, the jacking pipe is smooth in appearance, the resistance can be reduced in the construction process, the strength accords with the performance requirement of 500-1200t jacking force in the jacking process, the non-excavation underground construction demand can be completely satisfied, and the jacking pipe is strong on corrosion resistance and reliable in quality.