GPS-RTK定位技术在某公路工程中的应用研究

Application of GPS-RTK technology in a highway project

针对传统测绘技术存在耗时长、误差大等缺点,提出将GPS-RTK技术应用于某公路工程测量,利用GPS-RTK技术进行工程的四等GPS控制网测量、四等水准测量和地形图测量,并进行实测数据质量分析。结果表明:GPS-RTK技术测量所得数据精度均小于规范限制,将GPS-RTK技术应用于公路工程能够显著提高测量精度和工作效率;GPS-RTK技术应用于地形图测量的平面互差小于50 mm,高程互差小于100 mm;GPS-RTK技术测得的边长检测误差小于15 mm,高层检测误差小于40 mm。

In view of the shortcomings of traditional surveying and mapping technology,such as long time-consuming and large error,this paper proposes to apply GPS-RTK technology to the survey of a highway project,and use GPS-RTK technology to carry out the fourth-order GPS control network survey,fourth-order leveling and topographic map survey of the project,and carry out the quality analysis of the measured data.The results show that the accuracy of GPS-RTK technology is less than the standard limit,and the application of GPS-RTK technology to highway engineering can significantly improve the measurement accuracy and work efficiency;when GPS-RTK technology is applied to topographic map survey,the plane mutual difference is less than 50 mm and the elevation mutual difference is less than 100 mm;the side length detection error measured by GPS-RTK technology is less than 15 mm,and the high-rise detection error is less than 40 mm.