贵溪大桥独斜塔无背索斜拉桥塔梁同步施工技术

Synchronous Construction Technology of Pylon and Girder for Single-skewed-pylon No-backstay Cable-stayed Bridge of Guixi Bridge

贵溪大桥是采用独斜塔无背索结构的大跨径斜拉桥,施工采用了塔梁同步施工技术,将主梁悬拼与倾斜索塔施工结合起来,塔、梁、索一直处于动态三角平衡状态。控制施工各阶段应力、线形、索力,修正各种施工误差,确保成桥后结构受力和线形满足设计要求。

Guixi Bridge is a long-span cable-stayed bridge with the single-skewed-pylon no-backstay structure.The synchronous construction technology of pylon and girder is used in its construction.The cantilever assembly of the main girder is combined with the construction of the skewed cable pylon,which makes the pylon,girder and cable always at the dynamic triangle balance state.It is to control the stress,alignment and cable force of each construction period,and to correct various construction errors in order to ensure the structural stress and alignment to satisfy the design requirement after bridge completion.