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为解决大跨度连续梁、连续钢构、系杆拱等结构物受温度变化及线路振动影响轨道控制网(CPⅢ)变化,进而影响轨道基准点(GRP)平面测量数据处理,该文采用直接提取轨道基准点(GRP)平面观测的CPⅢ坐标数据,建立虚拟测站,形成边角网观测数据,采用自由网平差和约束网平差进行轨道控制网(CPⅢ)数据处理。结合具体测量实践,发现可以极大的提高轨道基准点(GRP)数据处理效率。
In order to solve the change of orbit control network (CP Ⅲ) of continuous steel structure, tied arch and other structures affected by temperature and line vibration, and then affect the data processing of orbit reference point (GRP) plane measurement, this paper adopts direct extraction Orbit reference point (GRP) plane observation CP Ⅲ coordinate data to establish a virtual station, the formation of the corner network observation data, the use of free network adjustment and constraint network adjustment for orbit control network (CP Ⅲ) data processing. Combined with the practice of measurement, it is found that the GRP data processing efficiency can be greatly improved.