摘要
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。
In monitoring control of the bridge jacking up, usually only the monitoring point coordinate values before and after lifi- ing are compared each other, so it is difficult to accurately determine the changes of bridge location and attitude because of no consider- ing the integrity of the bridge, and mixing the mess of observation error and coordinates change. In Zhongshan bridge jacking up monito- ring, the authors finished the unified adjustment processing of the coordinates and elevation of monitoring points based on Bursa model, and got the position, attitude and other parameters of the optimal valuation of variation in before and after jacking-up, which could pro- vide a scientific basis to bridge safety construction.
出处
《测绘科学》
CSCD
北大核心
2013年第2期132-134,共3页
Science of Surveying and Mapping
关键词
布尔沙模型
顶升
监控
BURSA model
bridge jack-up
monitoring control
