长距离线路工程首级平面控制网的建立

Establishment of first horizontal control net for long route engineering

详细论述了大同市御东区线路工程首级平面控制网的建立过程,分析了建立独立坐标系时中央子午线及投影面的选择与投影长度变形的关系,阐述了GPS平面控制网的各项技术指标,同时还对大同市御东区线路工程首级平面控制网与原大同市三等GPS控制网的相互转换进行了分析和探讨,为轨道交通工程管理提供了方便。

This paper specifically describes establishing process of first horizontal controlling net for Datong Yudong district route engineering, analyzes the relationship between the selection of central meridian and planes and plane length deformation while establishing independent coordinate, expounds various technical indicators of GPS horizontal control net, and simultaneously analyzes and discusses mutual transition between first horizontal control net for Datong Yudong district route engineering and original Datong urban third grade GPS control net. Therefore, it has provided convenience for rail transportation engineering management.