本文介绍了卫运河特大桥斜拉式混凝土连续桁梁预应力施工技术,对复杂预应力结构的 孔道成孔方法、钢铰线张拉顺序的确定、张拉力控制方法、孔道压浆工艺进行了详细论述,提出了 预应力施工中有关施工计算的方法,并对卫运河桥桁梁结构施工进行了简要介绍。

Thi s paper introduces the prest ressed co nst ructio n tech nique of the beam of Weiyun Riv er ex t ra-lo ng bridg e with cable-stay ed concrete continuo us t russ. The co nst ruction methods o f prest ressad aperture of complex prest ressed structures, the determination of the tensional sequence of steel cables, the methods of prestressed fo rce co ntro l a nd the art fo r gro uting prest ressed aper tures are di scussed in detail. Calcula ting methods o n prest ressed construction are presented, and the co nst ructio n w o rks of the structures of the Weiyun Riv er majo r bridg e are described briefly in thi s paper.