摘要
为了解决目前既有线测量效率不高等问题,在既有线测量中采用了一种基于超站仪的线上线下同时测量方法,其基本思想是利用超站仪下部的全站仪进行CPⅢ控制网测量,利用超站仪上部的GNSS接收机进行线下CPⅠ同步观测,并通过GNSS快速静态定位得到测站点坐标,再以此为起算点计算线上CPⅢ的坐标。推导论证了由线上测站点构成的新型CPⅡ网的精度,通过分析该方法在某段既有线CPⅡ网中的实验数据,说明该方法可以达到规范中时速160km铁路CPⅡ网的精度要求。研究结果表明,这种新型CPⅡ网较传统网具有多方面的优势,能最大化地节约CPⅡ网的测量成本,提高测量效率,可以在普速铁路既有线测量中应用推广。
In order to solve the problem of low measurement efficiency in existing railway measurement,the method based on super totalstation for railway online and offline simultaneous measurement is adopted in the measurement of the existing railway. The main idea is to use the total station in the lower portion of the super totalstation to survey CPⅢ control network,to use the GNSS receiver in the upper portion of the super totalstation to survey synchronously with CPI control network,after that to obtain the coordinates of the station by GNSS fast static positioning,and then to calculate the coordinates of CPⅢ on the railway line. The accuracy of the new CP Ⅱ network consisting of online stations has been proved in this paper. The experimental data of a certain existing railway CPⅡ network is analyzed. It shows that the method can meet the accuracy requirements of the specification about CPⅡ network with a speed of 160 km/h. The research results show that the new CPⅡ network has many advantages over the traditional network,which can maximally save the measurement cost of the CPII network and improve the measurement efficiency. So it can be used and promoted in the existing railway measurement.
作者
朱永辉
刘成龙
高淑照
杨雪峰
Zhu Yonghui;Liu Chenglong;Gao Shuzhao;Yang Xuefeng(Faculty of Geosciences and Environmental Engineering,Southwest Jiaotong University,Chengdu 611756,China;State-Province Joint Engineering Laboratory in Spatial Information Technology for High-SpeedRailway Safety,Chengdu 611756,China)
出处
《铁道勘察》
2019年第4期1-5,共5页
Railway Investigation and Surveying
基金
长江学者和创新团队发展计划资助项目(IRT13092)
关键词
超站仪
GNSS快速静态
新型CPⅡ网
自由测站
精度评定
Super station
GNSS Fast static positioning technology
New CPⅡ network
Free station
Accuracy assessment
