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嘉绍大桥主桥为六塔四索面分幅式钢箱梁斜拉桥,跨中采用刚性铰结构。无索区梁段采用多功能变幅式桥面吊机吊装,研发专用设备进行钢箱梁滑移。标准梁段由4台桥面吊机同步吊装,采用快速软连接装置、临时横梁构造等多项装置解决标准梁段吊装和轴线控制难题。合龙段采用顶推施工工艺。主要介绍在强涌潮水域中安装分幅式钢箱梁的关键技术及创新工艺。
The main bridge of Jiashao Bridge is a steel-shelled cable-stayed bridge with a six-tower and four-cable plane and a rigid hinge structure in the span. No cable zone beam multi-functional variable amplitude deck crane hoisting, research and development of special equipment for steel box girder slip. The standard beam section is hoisted synchronously by 4 deck cranes, and a number of devices such as rapid soft connection device and temporary beam structure are used to solve the problem of standard beam section hoisting and axis control. Closure section using push construction technology. This paper mainly introduces the key technology and innovative technology of installing framed steel box girder in strong gully waters.