大跨度钢斜拉桥施工误差调整方法研究

Study on construction error adjustment method of long-span steel cable-stayed bridge

按理论计算结果进行施工时,斜拉桥实际线形和内力与设计理想状态可能会存在一定误差,这不仅影响桥梁美观和行车舒适,同时还会影响桥梁使用寿命.针对斜拉桥施工中的线形、内力等施工误差,推导了用最小二乘法对其进行调整的基本方程,提出考虑结构几何非线性的误差调整方法.结合某大跨度钢斜拉桥施工阶段的主梁标高误差调整,用最小二乘法给出两种索力调整方案,结果表明,最小二乘法用于斜拉桥施工误差调整是可行的.

During construction, the actual state of internal force and configuration of a cable-stayed bridge may depart from the design, and affect not only the aesthetic aspect of the bridge, but also its life-span. To minimize or eliminate the construction error of the long-span cable-stayed bridge, in aspects such as configuration, and internal force, the basic equations of error adjustment are deduced, using the least square method. And construction error adjustment methods are put forward, considering the geometric non-linearity of the structure. Finally the least squares method is used to adjust the construction error of a long-span steel cable-stayed bridge. The results indicate that the method is available for the construction error adjustment of the cable-stayed bridge.