旧拱桥拱上建筑拆除施工与方案设计

摘要

The demolition process of a constant section catenary arch bridge using a 200 t truck crane is optimized,focusing on the demolition technology of the bridge deck,beams,columns,beam cap and base pad stone.The different demolition conditions for the removal process is numerically simulated with MIDAS-civil finite element software.The actual measured results show that the demolition procedure with a large hoisting equipment has many advantages such as safe,fast and economic;And the re sult can be referred by the future similar proiects.%采用200 t大型汽车吊对一座等截面悬链线箱型拱桥拱上建筑的拆除过程进行设计,对桥面板拆除、盖梁、立柱、基梁、台帽与垫石拆除进行着重介绍.实际施工结果表明,采用大型起吊设备进行拆除施工,具有安全、快速、经济的优势,采用MIDAS-civil有限元软件对拆除过程不同施工工况进行数值模拟分析,为该类工程的施工方案提供数据支持.