Open-cut tunnel prefabricated lining prestress connecting structure and method of upper and lower blocks

The invention belongs to the technical field of underground structure engineering, and particularly relates to an open-cut tunnel prefabricated lining prestress connecting structure of upper and lowerblocks. The open-cut tunnel prefabricated lining prestress connecting structure is formed by longitudinally splicing a plurality of lining rings; each lining ring comprises a prefabricated lining upper block and a prefabricated lining lower block; and a plurality of vertically penetrated vertical prestress tensioning holes are correspondingly formed in a top plate and an upper side wall of each prefabricated lining upper block and a bottom plate and a lower side wall of each prefabricated lining lower block. The same prestress twisted steel is tensioned in the corresponding vertical prestressed tensioning holes in the vertical direction, and fine aggregate concrete is injected in a pressing mode. According to a connecting method, the vertical prestress connection of the prefabricated lining upper blocks and the p