针对某预应力混凝土连续刚构桥在中跨合龙张拉预应力过程中出现的箱梁底板严重损坏现象,文章分析了病害原因,阐述了修复设计方案,采用了凿除中跨梁段损坏的混凝土底板再进行修复的方法,介绍了施工过程中钢束放张、切割、临时支撑、混凝土配合比和界面处理等具体的工艺及措施,通过修复施工后的预应力张拉施工监测结果,结构达到了预期的修复效果。 Aiming at the severe damage of the box girder floor during the prestressing process of a prestressed concrete continuous rigid frame bridge during mid-span tension and tensioning, the article analyzed the cause of the disease, elaborated the plan of restoration design, Concrete floor and then repair method, introduced during the construction process steel beam release, cutting, temporary support, concrete mix and interface treatment and other specific processes and measures through the repair of prestressed construction monitoring results after the construction Reached the expected repair effect.