三跨下承式钢管混凝土拱桥吊杆更换关键技术与施工

Key Technology and Construction of Suspender Replacement forThree Span Through Concrete Filled Steel Tubular Arch Bridge

以南京某三跨下承式钢管混凝土系杆拱桥更换吊杆为例,介绍新吊杆的选择、临时吊杆系统的设计、吊杆的更换,索导管内混凝土切除等关键技术的研究,介绍了吊杆更换的施工监控要点,供同类桥梁工程养护维修时参考。

Taking the replacement of Suspenders for a three span through concrete-filled steel tubular tied arch bridge in Nanjing as an example,this paper introduces the selection of new suspenders,the design of temporary suspender system,the replacement of suspenders,the removal of concrete in cable ducts and other key technologies,and introduces the key points of construction monitoring of suspender replacement,which can be used as a reference for the maintenance of similar bridge projects.