大跨度桥梁预应力混凝土箱梁施工技术方案

Construction Technique of Prestressed Concrete Box Girder in Large Span Bridge

在南水北调中线京石段工程跨渠大跨度桥梁建筑施工中，为实现一跨过渠无阻水目标，桥梁主体全部采用预应力混凝土箱梁结构，跨度为50m，主要介绍预应力混凝土箱梁施工工艺、方法、张拉技术及主要缺陷的处理措施。

In order to cross channel without stop the flow, the large span bridge body is constructed with prestressed concrete box beam structure and the span is 50 m in the Shijiazhuang-Beijing section of the Mid route in the South-to-North Water Transfer Project. It introduced the construction craft, method, tension technique, and the defect treatment of prestressed concrete box beam.