在桥梁顶升作业监控中,通常只对监测点顶升前后的坐标值进行比较,由于没有考虑梁体的整体性,且观测误差和坐标变化量混杂其中,因此难以准确判断桥梁的位置及姿态的变化情况。在中山桥的顶升作业监控中,笔者基于布尔沙模型对监测点坐标及高程进行统一平差处理,获取桥梁在顶升前后位置、姿态等参数变化量的最优估值,从而为桥梁的安全施工提供了科学的依据。 Generally, only the coordinate values ​​before and after the ascent of the monitoring point are compared in the monitoring of the lifting of the bridge. Since the integrity of the beam is not considered and the observation error and the variation of the coordinate are mixed, it is difficult to accurately determine the position and attitude of the bridge Changes in the situation. In the monitoring of the lifting of Zhongshan Bridge, the author adjusts the coordinates and elevation of the monitoring points based on the Bursa model, and obtains the optimal estimation of the variation of the parameters such as the position and attitude before and after the ascent of the bridge, Safe construction provides a scientific basis.