Pipe piece reinforcing structure for tunnel construction

The utility model discloses a duct piece reinforcing structure for tunnel construction, which comprises a duct piece, a plurality of matched support rings are uniformly arranged in the duct piece, and a plurality of longitudinal bars are connected among the plurality of support rings; the supporting ring is provided with a lower ring section and an upper ring section, middle ring sections are connected to the two sides of the lower ring section and the two sides of the upper ring section, reinforcing ribs are arranged in the upper ring section and the upper ring section, and the upper ring section is fixedly connected with the two middle ring sections through bolts. A plurality of fixing columns are connected between the reinforcing ribs on the upper side and the lower side, and tensioning assemblies are arranged between the lower ring section and the two middle ring sections. The supporting ring is reasonable in design and novel in structure, the supporting ring is convenient to transfer and assemble, the st