从工程实践出发,以合宁高速公路扩建工程南淝河特大桥主桥拆除为实例,介绍了高速公路跨河道预应力钢筋混凝土连续箱梁拆除的施工方法及关键技术,并对具体交通组织、施工工艺做了详细探讨和经验总结,以便今后在桥梁拆除施工中参考。 Starting from the engineering practice, taking the demolition of the main bridge of Nanning River Bridge as an example, this paper introduces the construction methods and key technologies of the prestressed concrete continuous box girder removal of expressway crossing river, and analyzes the traffic organization, Construction technology to do a detailed discussion and lessons learned in order to bridge construction in the future reference.