【摘要】 针对钢筋混凝土连续弯箱梁产生较大横向位移以及固定支座墩柱变形开裂情况,通过理论分析,从受力特点、计算分析以及超高车辆撞击力的作用等多方面,探讨了产生侧移的原因。通过将中间固定支座柱式墩改造成墙式薄壁固结墩、顶升箱梁更换支座和加强桥台处横桥向挡块等一系列措施,对其进行了维修改造设计和施工,通过运营使用,说明改造设计是合理可行的,取得了良好的效果。更多还原

【Abstract】 For a reinforced continuous curved box girder, lateral displacement took place, and deformation and cracking occurred in fixed bearing pier. Through theoretical analysis, this paper discussed the causes of lateral placement, taking many factors into consideration, such as mechanical characteristics, computational analysis, the impact of hit by high truck and so on. The series of treatments of changing the column pier of the middle fixed bearing into thin-walled fixed pier, replacing the bearings following jacking the box girder and strengthening the stopper in the transverse direction were carried out in the design and construction of the maintenance for the bridge. The reconstruction design was proved to be reasonable and practicable, which achieved good effect.更多还原