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1. process principle

The construction technology of bridge segmental beam prefabrication and assembly is based on the principle that the bridge superstructure is divided into several standard segments. After the prefabrication is completed at the prefabrication site, special assembly equipment such as bridge erecting machine is used on the bridge substructure on site, and prestressed at the same time to make it an integral structure, and the bridge substructure is pushed forward and assembled span by span along the predetermined installation direction.
2. scope of application

Suitable for medium span (30~50m), the total length of the bridge is longer sea, large rivers and lakes, mountain bridges and urban elevated and light rail and other upper structure box girder construction, and the project is the most suitable for tight schedule.
3. construction method

The prefabrication process of bridge segment girder is to cut the whole span girder body along the direction perpendicular to the longitudinal axis of the bridge, divide the girder body into several segments, transform and decompose the spatial design coordinates of the proposed bridge into the pre-control coordinates of each segment in the prefabrication plant, and finish all the segments one by one by using the close-fitting and matching pouring method in the prefabrication plant. At the construction site, special large-scale bridge erector equipment is used to finish the high-made, arranged in sequence along the longitudinal direction of the bridge, and connected as a whole is located on the bridge pier.