刚性组合支架在斜拉桥主塔安装施工中的应用

Application of Rigid Composite Support in Main Pylon Installation Construction of Cable-stayed Bridge

单塔无背索斜拉桥是一种造型独特、受力及结构复杂的斜拉桥。神舟友谊大桥无背索斜拉桥主塔为半椭圆弧门形塔,倾斜的塔身抵挡斜拉索传递的桥面荷载,组成了梁塔结构的平衡体系。主要介绍神舟友谊大桥主塔安装采用刚性组合支架安装的施工技术、主塔安装测量控制技术、主塔安装关键施工技术,为无背索斜拉桥的主塔安装施工提供有益的借鉴。

The single-pylon no-back-cable cable-stayed bridge is a cable-stayed bridge with the unique modeling and complicated stress and structure.Shezhou Youyi Bridge is a no-back-cable cable-stayed bridge.Its main pylon is a semi-elliptic arc portal pylon.The oblique pylon body can withstands the deck load transferred by stayed cables.The balance system of beam-pylon structure is formed.The rigid composite support construction technology,the measurement control technology and the key construction technology are used to install the main pylon of Shezhou Youyi Bridge.The relative experience can provide the beneficial reference for the installation of the main pylon of the similar no-back-cable cable-stayed bridges.