本文以四渡河大桥为工程背景,根据大跨度悬索桥上部结构施工过程中索塔的受力特性,合理划分施工阶段,采取主鞍预偏、分次顶推的方法,有效控制索塔应力。可作为其他类似工程控制的参考。 In this paper, the Siduhe River Bridge is taken as the engineering background. According to the stress characteristics of the pylon during the construction of the superstructure of long-span suspension bridges, the construction stage is reasonably divided. The main saddle pre-deflection and sub-push are adopted to effectively control the stress of the pylon. Can be used as a reference for other similar engineering controls.