跨铁路城市互通立交桥梁转体快速施工方法介绍

摘要

With progress of urban construction,the interchange bridges are getting more. When the urban interchange bridges pass over existing road and railway,it is required that the normal operation of existing road and railway be guaranteed during construction. In order to settle the construction key points of this kind of bridge under condition of assure safety of road/railway operation,in combination with construction of 256m variable section prestressed concrete continuous box girder swivel on certain interchange bridge passing over railway, this paper introduced rapid construction of urban interchange bridge passing over road/railway,result shows this method was successful,it may provide reference for designing/construction of similar urban interchange bridges.%随着城市建设的不断推进,互通桥梁修建日益增多.城市互通桥梁跨既有公路及铁路时通常要求在施工过程中需保证既有公路及铁路的正常运营.为解决该类桥梁在保证既有公路及铁路运营的安全条件下快速施工这一施工重点、难点问题,结合某改造工程跨铁路立交桥256 m变截面预应力混凝土连续箱梁转体施工,介绍跨线城市互通桥梁快速施工,施工结果表明该方法是成功的,可供类似城市跨线桥梁工程设计和施工参考.