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超高层建筑施工中常采用激光投点仪向上传递地面控制点作为测量基准。为了避免投点误差过大,本文采用BDS+GPS技术进行组网监测其投点精度,给出了超高层建筑BDS+GPS监测相应的数据处理策略,对比分析了BDS、GPS及组合BDS+GPS 3系统之间,以及与激光投点前地面点坐标之间的差异。结果表明,GPS和BDS+GPS组合系统定位精度相当,BDS定位性能稍差,但满足超高层监测精度要求,利用北斗技术进行超高层建筑基准传递工作具有一定可行性。
Often used in the construction of super high-rise construction of the laser point of delivery device to pass up the ground control point as a measurement basis. In order to avoid too much error, this paper uses BDS + GPS technology to monitor the accuracy of its investment, gives the corresponding data processing strategy of BDS + GPS monitoring in super tall buildings, and compares and analyzes BDS, GPS and combined BDS + GPS 3 systems, and the difference between the coordinates of the ground point before laser throwing. The results show that the positioning accuracy of GPS and BDS + GPS combined system is quite low, but the positioning performance of BDS is a bit poor. However, it is feasible to meet the requirements of ultra-high-rise monitoring precision and to use the Beidou technology to transfer the reference of super high-rise buildings.