Abstract: Through the practice of vertical pressers in long span continuous box girder and the research of two way prestress model test,the construction technology about unbonded vertical prestress is proposed and applied in Hanjiang Bridge in Hanchuan.For the first time,It’s first adopted in long span concrete bridge in our country and a lot of economic benefits are created because of its advantages such as little drill way,rapid and imple construction,high quality and so on.

Key words: Hanjiang River Highway Bridge in Hanchuan, unbonded vertical prestress, two way prestress model test, protection of tendons against corrosion

摘要： 通过汉川汉江公路大桥大跨径连续箱梁竖向预应力施工实践和双向预应力模型梁试验研究 ,在该桥施工中提出并应用了无粘结竖向预应力技术 .这在国内大跨径砼桥梁上尚属首次全面采用 ,它具有孔道直径小 ,施工简便快速 ,质量易于保证等优点 ,为全桥预应力施工创造了较为显著的社会经济效益.

关键词: 汉川汉江公路大桥, 无粘结竖向预应力, 双向预应力模型梁试验, 力筋防腐