Abstract:In order to solve the problems of long construction period, bad civilization construction, high safety risk, long road occupation time and great influence on surrounding traffic environment, etc. , this paper gives an example of the construction of the prefabricated bridge in the upgrading and reconstruction of Moganshan Road (Shixiang road-north line around the city China National Highway 104 toll station) project, by adopting the methods of standardized prefabrication of components, transportation of multi-wheel 18-axis hydraulic balanced flat-bed vehicle, mechanized centralized hoisting, precise and rapid construction, rapid and accurate installation of prefabricated vertical columns, precise location of double-column integrated cover beams, rapid installation of super-long and overweight cover beams, prefabrication and precise installation of long and large multi-segment cover beams, and quality assurance of sleeve grouting, it solves the problem of bridge construction on busy roads in cities, which has strong practical significance and can provide reference for the construction of bridges in similar cities.