在大跨度预应力砼桥梁的施工中,长距离孔道穿束困难严重制约着工程进度,极易造成堵孔,给孔道“开刀”对工程质量造成一定的影响。通过在重庆鱼洞长江大桥大跨径连续箱梁预应力施工的课题研究,在该桥施工中研究并应用了纵向长束穿索器、分段接力压浆等措施,形成了在超长距离情况下较为成功的预应力施工工艺。 In the construction of long-span prestressed concrete bridges, the difficulty of penetrating the long-distance tunnel seriously restricts the progress of the project, which can easily cause the blockage of the hole, which will affect the quality of the project to some extent. Through the research on the prestressed construction of long-span continuous box girder of Chongqing Yudong Yangtze River Bridge, longitudinal long-haul rope traverser and sectional pressure grouting are researched and applied in the construction of the bridge. Case of more successful prestressed construction process.