南昌市轨道交通4号线平面控制网建立

Establishment of Line N0.4 Nanchang Rail Transit Project GPS Control Network

南昌轨道交通工程控制网是南昌市轨道交通施工和建设的基础,它主要由轨道交通工程平面控制网和高程控制网组成。对南昌轨道交通4号线控制网的坐标基准和外业观测进行了阐述,并分别利用LGO软件和TBC软件对控制网进行基线解算和平差处理,并将解算结果进行分析比较,解算结果的各项精度指标均满足相关规范要求,可以作为南昌市城市轨道交通4号线建设的基础。

The control network of Nanchang rail transit project is the foundation of Nanchang rail transit construction, it mainly consists of plane control network and elevation control network of rail transit engineering. This paper expounds the coordinate datum and field observation of Nanchang rail transit line 4 control network, and uses LGO software and TBC software to calculate the baseline set- tlement of the control network, and compares the calculated results, and the accuracy indexes meet the relevant specifications, can be the basis of Nanchang metro line four.