一种用于吊杆更换抱箍式临时兜吊系统的设计和施工

本文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吊杆更换中抱箍式临时兜吊系统的选型、体系组成及各构件设计要点,并通过有限元程序进行理论计算验证及试验工况验证;另外重点介绍了临时兜吊系统相关安装及施工工艺,经工程实践证明该抱箍式临时兜吊系统能够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。

Design and construction of a temporary hoisting system using a clamp-type hoist for replacing hangers

This paper, combined with an example of an old bridge maintenance project, introduces the selection, system composition, and design key points of each component of a clamp-type temporary hoisting system for replacing hangers in a bottom-bearing steel pipe truss concrete arch bridge, and verifies it through theoretical calculation and test conditions using finite element programs. In addition, it focuses on the installation and construction technology of the temporary hoisting system. The engineering practice has proved that the clamp-type temporary hoisting system can safely and effectively achieve the replacement of hangers. At the same time, this practice can provide reference for the design and construction of similar bridge type hanger replacement and similar temporary hoisting systems.