浅谈后张法现浇箱梁预应力张拉施工问题处理

预应力混凝土在公路桥梁施工，尤其在跨线、立交现浇梁建设中，普遍采用后张法预应力。笔者结合银象立交桥（一期工程）后张法现浇箱梁施工实践，对张拉施工过程中的问题进行了初步分析，并对其采取了特殊的处理方法，以供读者参考。

Discussion on Construction Problems of Prestressed Tensioning Cast-in-situ Box Girder Tension

In highway bridge construction, especial y in the cross line building, prestressed concrete commonly use post te-nsioning prestress. the author combined the practice of cast-in-place box beam construction of Silver Elephant overpass （f-irst phase）, discussing the tension problems in process of con-struction, and taking a special processing method, which prov-ide reference for readers.