黄家湾水利枢纽工程施工控制网GNSS拟合高程精度探讨  

Discussion on Accuracy of Elevation Fitting by GNSS about Construction Control Network for Huangjiawan Water Control Project

作　　者：胡君 罗天文 吴恒友 徐锐 Hu Jun;Luo Tianwen;Wu Hengyou;Xu Rui

机构地区：[1]贵州省水利水电勘测设计研究院有限公司,贵州贵阳550002

出　　处：《吉林水利》2020年第7期9-12,共4页Jilin Water Resources

基　　金：贵州省重大科技专项(黔科合重大专项字[2017]3005号);贵州省科技计划项目(黔科合支撑[2016]2030)。

摘　　要：黄家湾水利枢纽工程施工控制网包含平面控制网和高程控制网,均要求高精度、高可靠性。GNSS广泛应用于平面控制网测量,但其高程被认为精度较低很少应用于高程控制网测量。本文在分析施工控制网特点的基础上,通过实际案例证明在小范围施工控制网中,通过合适的拟合模型,选取合理的已知点,GNSS拟合高程能够满足中小型水利水电工程高程控制网精度要求,可减少高程测量工作量,提高作业工作效率,并根据工程经验探讨了提高GNSS高程拟合精度的方法。The construction control network for Huangjiawan water control project includes the plane control network and the elevation control network,both all demand high accuracy and high reliability.GNSS is widely used in plane control network measurement,but in its elevation accuracy is considered being lower,GNSS is rarely used in elevation control network measurement.In this paper,the authors,based on the analysis of the characteristics of the construction control network,by means of practical cases proving that in a small-scale,by suitable fitting model and selecting reasonable known point,the fitting elevation by GNSS can meet the elevation control requirements for small and medium-sized water conservancy and hydropower projects,for this reason the elevation measurement workload can be reduced and the work efficiency can be improved.Also the authors discussed the method improving accuracy of elevation fitting by GNSS.

关 键 词：水利水电工程 施工控制网 高程控制网 GNSS拟合高程 

分 类 号：TV221[水利工程—水工结构工程]