苏通大桥斜拉桥主跨跨径为1088m，370个高精度应力监测点的全过程实测数据表明，在钢箱梁吊装施工过程中，主梁应力处于复杂的波动状态，日照辐射、温度变化和风等气象因素对钢箱梁应力变化具有重要影响。利用小波去噪方法对有代表性测点的应力数据进行信噪分离，结合实时气象观测资料，针对不同的气象条件，采用分层剥离法确定日照辐射等气象因素产生的应力响应，从而基本剥离气象因素对主梁应力的影响，建立钢箱梁吊装、焊接、一次张拉、桥面吊机前移和二次张拉过程中的主梁应力时程曲线，为钢箱梁调位和斜拉索张拉施工控制提供了准确、可靠的应力数据。

Sutong Bridge is a cable-stayed bridge with a main span of 1088 m. 370 high-precision stress monitoring measured date shows that in the process of hoisting the steel box girders, the stress of the main girders is in the fluctuant and complex state and many meteorological factors, such as sunshine radiation, temperature and wind, have important implication on the variable stress of the steel box girders. According to the real-time weather date, the stress date after the process of wavelet denoising from representative measuring points in different weather conditions is picked to establish the stress response brought by meteorological factors with Layered Separation method, thereby basically eliminating the influence of meteorological factors on the stress of main girders, so that accurate and reliable stress date can be got for steel box girders adjusting and cable-tensioned construction control.