宝鸡代家湾渭河大桥主塔施工技术

Main Pylon Construction Techniques of Daijia Bay Weihe Bridge in Baoji City

宝鸡代家湾渭河大桥主桥为两座单塔无背索斜拉桥,主塔设计为钻石型钢筋混凝土结构,采用整体提升模板施工。对临时支撑、劲性骨架、模板、主塔施工进行了总结,可供同类工程施工参考。

Single-column pylon cable-stayed bridge without backstays is a unique cable-stayed bridge which is developed in recent years, The inclined cable-stayed bridge and girder make a pylon and beam equilibrium system. Main pylon resists the load over girder from cable as cantilever. Structure and stress of the single-column pylon cable-stayed bridge without backstays are very complicated. The main bridge of Daijia bay Weihe bridge in Baoji city consists of two single-column pylon cable-stayed bridges without hackstays. The diamond-shaped main pylon is constructed by reinforced concrete. Also, integral lift of formwork is exercised in the construction. In this paper, the technology of temporary support, stiff skeleton, formwork, construction of main pylon is summarized, which can be used by other similar construction as reference.