悬臂梁桥施工监控中梁段施工预拱度调整技术

Construction pre-arch adjustment technology of bridge section in cantilever bridge construction monitoring

针对预应力混凝土连续刚构桥线形控制时存在的实际结构状态与理论计算的偏差问题,提出一种结合参数识别调整、前期预测及偏离分配计算出施工预拱度调整值,并对未浇筑主梁的立模标高进行修正的方法,实践证明采用该方法可避免后续梁段的误差累计,具有广泛推广应用的价值。

In light of the deviation of actual structural condition and theoretical calculation of prestressed continuous concrete steel bridge in the linear control,the paper puts forward a new construction pre-arch adjustment value by combining parameter identification adjustment,preliminary prediction and deviation distribution,and carries out the correction for vertical beam model height without being casted. Practice proves that：ap-plying this method can avoid continuous beam error accumulation. Thus,it is worth promoting.