English：

The approach bridge of a high-speed railway bridge across the Yellow River is a 3 × 56mprestressed concrete three-span curved continuous girder bridge. In order to shorten the constructionperiod, the 21 three-span curved continuous girders are constructed by segmental prefabrication and fullyglue splicing. Each three-span continuous girder consists of 4 pier top segments and 11 segments withineach span, totalling 37 segments, and the approach bridge has 777 prefabricated segments for all 21spans. In order to ensure the section prefabrication accuracy of each three-span continuous girder, reducethe difficulty of section assembly and improve the prefabrication efficiency, 4 pier top sections areprefabricated by 4 independent single-section pedestals, and 11 non-pier top sections within each spanare prefabricated by“2+1” section short-line method matching prefabrication on the long-line pedestal with a length of 170m. That is to say, long line method and short line method are combined toprefabricate the sections. After the prefabrication of 4 pier-top segments is completed, they aretransported to the long-line pedestal as the starting segments for the short-line matching prefabrication of11 segments in each span. From the end of each span to the middle of the span direction prefabrication,a total of 2 sections for each span, a total of 6 sections for three spans at the same time matchprefabrication, forming sixwork surfaces. On the long-line pedestal, 2 completed segments are alwayskept as matching segments for the newly cast segments, and the remaining segments are lifted off thelong-line pedestal. After the pier top section position of the long-line pedestal is vacated, the next three-span continuous girder cycle of prefabrication is entered. During the prefabrication of each three-spancontinuous girder section, the long-line pedestal distinguishes between the large and small mileagedirections of section assembly and erection, and each section is uniquely numbered. The collision checkof ordinary steel bars, prestressing pipelines and embedded parts in the section through BIM model solvesthe position conflict problem in advance. The section prefabrication and assembly and erection of 21continuous girders show that the prefabrication of the sections by long-short line combination method canachieve the high-precision line shape of curved girders and high efficiency.