摘要
由于地面基站在控制流动站的过程中,易受到信号时偏的影响,使得无法准确评估放样位置的信号质量,导致获得的RTK放样位置坐标与基准坐标之间的残余偏差值较大,RTK放样精度较低。在太平河斜拉桥施工过程中,由于主塔高度大于100m,超高的主塔结构,使全站仪放样难度剧增,为此,提出误差圆分析下的斜拉桥主塔RTK最优放样位置优化研究。根据主塔RTK测量放样的基本原理,确定桥梁施工高程放样的精度要求,并利用差值模拟方法计算放样控制点的数量,将基站信号数据码与调制码进行异或相加,对时偏进行校正,并求取地面基站扩频的相位和扩频增益,结合流动站接收的信号评估RTK放样点位置的信号质量,以此为依据,根据RTK系统的性能参数与工程要求,确定误差圆的半径与范围,结合斜拉桥主塔特点选择候选放样位置,通过评价候选放样位置的测量准确度,确定最佳放样位置。实验结果表明,所提方法得到的RTK放样位置坐标与基准坐标间的残余偏差值更小,放样精度较高。
Due to the susceptibility of ground base stations to signal bias during the control of mobile stations,it is difficult to accurately evaluate the signal quality of the layout position,resulting in a large residual deviation value between the obtained RTK layout position coordinates and the reference coordinates,and low RTK layout accuracy.Therefore,a study on the optimization of RTK optimal layout position for super high-rise buildings under error circle analysis is proposed.Based on the basic principle of RTK measurement and layout for ultra-high buildings,the accuracy requirements for construction map mapping are determined,and the number of layout control points is calculated using the difference simulation method.The base station signal data code is XOR added to the modulation code,and the time offset is corrected.The code phase and spread spectrum gain of the ground base station are calculated,and the signal quality of the RTK layout point position is evaluated based on the signal received by the mobile station.Based on this,the radius and range of the error circle are determined according to the performance parameters and engineering requirements of the RTK system.Candidate layout positions are selected based on the characteristics of ultra-high buildings,and the measurement accuracy of the candidate layout positions is evaluated to determine the optimal layout position.The experimental results show that the residual deviation between the RTK layout position coordinates obtained by the proposed method and the reference coordinates is smaller,and the layout accuracy is higher.
作者
马新文
左智刚
徐欢
Xinwen Ma;Zhigang Zuo;Huan Xu(China Railway 20th Bureau Group Sixth Engineering Co.Ltd.,Xi'an,Shaanxi 710032;China Railway Construction Technology Testing Co.Ltd.,Xi'an,Shaanxi 710016;Shaanxi Railway Engineering Vocational and Technical College,Weinan,Shaanxi 714000)
出处
《新疆钢铁》
2025年第4期63-65,共3页
Xinjiang Iron and Steel
基金
中铁二十局集团科技研究项目(YF2306QT21B)。
关键词
误差圆
斜拉桥主塔
RTK
测量放样
位置优化
error circle
super high-rise buildings
RTK
measurement and layout
location optimization
