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斜拉桁架桥是近20年来得到较大发展的一种新颖桥型,该桥型具有自重轻、刚度大,受力明确以及材料利用率高的优点。目前,国内修建的斜拉式桁架桥大部分采用悬臂拼装的施工方法,还没有采用过悬臂浇注法施工。文中以宜昌小溪塔大桥为研究对象,介绍了该类桥型采用悬臂浇注的施工工艺及关键技术,并对具体施工方法做了详细探讨。
Cable-stayed truss bridge is a new type of bridge that has been greatly developed in recent 20 years. The bridge has the advantages of light weight, high rigidity, clear stress and high material utilization rate. At present, most of the diagonal truss bridges built in China adopt the construction method of cantilever assembly, and have not been constructed by the cantilever casting method. In this paper, Yuxi Xiaoxita Tower Bridge is taken as the research object, the construction technology and key technology of this kind of bridge type using cantilever casting are introduced, and the concrete construction method is discussed in detail.