预应力混凝土后张法桥梁以往都是由工厂预制的,绝大多数施工单位还不能在现场生产。本文就现场预制进行了分析,对工艺质量控制的难点做详细叙述。现场预制桥梁对缓解铁路运输运能紧张是有益的,对降低桥梁的实际成本也是有益的。 After the prestressed concrete bridge method used to be prefabricated by the factory, the vast majority of construction units are not yet able to produce in the field. This article has carried on the analysis to the on-the-spot prefabricated, elaborated the difficulty of the craft quality control in detail. Prefabricated bridges on site are good for alleviating the shortage of transportation capacity of the railway and are also beneficial for reducing the actual cost of bridges.