中承式钢筋混凝土吊杆拱换吊杆设计与施工技术研究

Research on Design and Construction Technology of Half-through Reinforced Concrete Suspender Arch Replacing Suspender

吊杆拱是梁、拱、索的组合体系结构,因其跨越能力强、施工方便、造型美观等优点,自1990年以来在我国得到了大量的应用,但受限于建设年代的局限性,设计及施工相关的标准不成熟,可借鉴的工程经验少,经过近30年的运营,吊杆已远超现行规范规定使用年限的要求,部分拱桥被迫采用降低通行标准的方式运营,吊杆更换成为急待解决的问题。本文通过对比分析常规换吊杆方案,结合具体项目,对换吊杆设计与施工技术进行分析,为今后类似工程提供参考。

Since 1990,hanger rod arch has been widely used in China because of its strong spanning ability,convenient construction and beautiful shape.However,due to the limitation of the construction years,the standards related to design and construction are not mature,and there is little engineering experience for reference.Some arch bridges have been forced to operate in a way that reduces the passing standard,and the replacement of suspenders has become an urgent problem to be solved.This paper analyzes the design and construction technology of replacing hanger rod by comparing and analyzing the conventional scheme of replacing hanger rod,combining with the concrete project,to provide reference for similar projects in the future.