蓝山湘江源至九嶷山公路GPS控制网的构建方案研究

Research on Construction Scheme of GPS Control Network from Blue Mountain Xiangjiang Source to Jiuyi Mountain Highway

湘江源头湖南蓝山位于永州市国家森林公园中。修建景区公路是加快湘江源及九嶷山景区建设的必要条件。该路线高海拔、高落差的地形条件使路线控制测量增加了技术难度。为了保证公路设计与施工质量,构建准确可靠的GPS控制网是关键。本文介绍了通过构建不同高程抵偿面的任意带高斯投影坐标系统,并对不同抵偿面之间进行数据融合,利用CORS系统对控制网进行优化,从而解决了因为高海拔、高落差引起的投影形变。

Hu’nan Blue Mountain,the source of Xiangjiang River,is located in Yongzhou National Forest Park. The construction of scenic highway has become a necessary condition to speed up the construction of Xiangjiang River source and Jiuyi Mountain scenic spot. The topographical conditions of high altitude and high drop of the route increase the technical difficulty of route control survey. In order to ensure the quality of highway design and construction,the key is to build an accurate and reliable GPS control network. In this paper,by constructing any Gauss projection coordinate system with different elevation compensation surfaces,and data fusion between different compensation surfaces,the CORS system is used to optimize the control network,so as to solve the projection deformation caused by high altitude and high drop.