以30 m后张法预应力混凝土箱梁现场预制为例,介绍了现场预制箱梁的主要施工工艺,从模版的设计制作、钢筋加工、混凝土施工等方面对其工艺进行了论述,对类似工程有一定的参考作用。工程概况某铁路分离式立交桥,上部结构采用30m的后张法预应力箱梁,其为先简支、后连续结构,该桥共有30m Taking the 30 m post-tensioned prestressed concrete box girder as an example, the paper introduces the main construction technology of on-site prefabricated box girder, discusses its technology from the aspects of the design of the stencil, steel processing and concrete construction, Have some reference. Engineering Overview A railway separation overpass, the superstructure using post-tensioned 30m prestressed box girder, which is the first simple support, after the continuous structure of the bridge a total of 30m