Prefabricated assembly type rapid repairing method for FRP constraint UHPC formwork of reinforced concrete pier

The invention relates to the technical field of concrete structure column reinforcement, in particular to an FRP constraint UHPC formwork prefabricated assembly type rapid repairing method for a reinforced concrete pier, the pier, a UHPC shell, a grouting concrete injection pipe, FRP cloth, a binder, a semicircular ring and a groove are included, the UHPC shell is installed on the outer wall of one side of the pier, the FRP cloth is connected to one side of the UHPC shell in a winding mode, and the FRP cloth is connected to the other side of the UHPC shell in a winding mode. An adhesive is coated between the FRP cloth and the UHPC shell, semicircular rings are symmetrically mounted on one side of the UHPC shell, grooves are formed in the top ends of the semicircular rings, and grouting concrete injection pipes are mounted on one sides of the grooves; the diameter of the UHPC shell is slightly larger than the circumcircle of the pier; prefabricating of the structure is achieved, formwork-free and supporting-fr