【摘要】 结合旧桥维修工程实例,介绍了某下承式钢管桁架混凝土拱桥在梁下有限高度下吊杆更换临时兜吊系统的选型、体系组成及关键构件设计要点,并通过有限元程序进行理论计算验证及试验工况验证,经工程实践证明该临时兜吊系统安全有效地实现了吊杆更换。同时该实践可为同类桥型吊杆更换和同类型临时兜吊系统的设计、施工提供借鉴。更多还原

【Abstract】 According to the maintenance engineering practices of old bridge, the article introduces the type selection and system composition of the temporary pocketing hoist system for the suspender replacement under the beam at limited height of a through steel-tube truss concrete arch bridge, and the design essentials of its key components. And the theoretical calculation verification and test condition verification are carried out through the finite element program. The engineering practice has proved that this temporary pocketing hoist system safely and effectively realizes the suspender replacement. Also this practice can provide the reference for the replacement of the similar bridge suspenders, and the design and construction of the similar temporary pocketing hoist systems.更多还原