合肥市轨道交通3号线GPS控制网建立

The Establishment of Line NO. 3 HEFEI Rail Transit Project GPS Control Network

轨道测量控制网包含GPS控制网、精密导线控制网和高程控制网。本文介绍了合肥市轨道交通3号线GPS控制网的基准设计、网的布设情况,通过对布网、外业观测和内业数据处理的分析,该项目数据处理方法合理,主要精度指标满足规范要求,可以作为合肥市轨道交通3号线施工的平面测绘基准,并对GPS技术在城市轨道控制测量中的应用总结了几点经验。

Surveying control network for metro include GPS control network,precise- traverse net and elevation control network. The paper introduced the datum design and layout of GPS control network. Through the analysis of net deployment,field observation and data processing,the major accuracy can meet the requirements of specification with reasonable data processing mothod,this project can be used as surveying datum for line NO. 3 Hefei rail transit. The paper put forward a little of experience about using GPS eechnology in the urban metro control survey.