Abstract: Taking the construction control project of Yangtze River Highway Bridge from Suzhou to Nantong as an example,the model of entire bridge is established to simulate the whole construction process in terms of basical ideal of geometry construction control method,and then the unstressed configuration of steel box girder and unstressed cable length in the service stage are found out.In the light of the completed bridge,the effect on the configuration and stress with the change of various parameters is analyzed on the condition of ensuring unstressed configuration of steel box girder and unstressed length of cable.The parameters include self-weight of steel box girder,stiffness of cable,temporary load during construction process and etc.

Key words: geometry control method, cable-stayed bridge, unstressed configuration, unstressed cable length

摘要： 从几何控制法的基本思想出发,以苏通长江公路大桥施工控制项目为背景,建立全桥模型模拟全桥施工全过程,找出基准状态下的钢箱梁无应力线形和成桥状态下斜拉索无应力索长。在保证钢箱梁无应力线形和成桥斜拉索无应力索长不变的条件下,分析了主梁重量、斜拉索刚度、临时施工荷载等结构参数变化对成桥线形、应力的影响。

关键词: 几何控制法, 斜拉桥, 无应力线形, 无应力索长