RTK技术在杭州湾跨海大桥桥位地形测绘中的应用

Applications for RTK to topographic survey for the Hangzhou Bay Major Bridge

介绍了RTK技术在杭州湾跨海大桥桥位地形测绘中的应用,并对其定位结果进行了精度比较与分析,结果表明:RTK定位测量的点位精度可达厘米级,各点位之间不存在误差积累,与全站仪等测量手段取得的结果符合得较好,可以用来代替二三级导线控制测量和等外水准等测量方法;流动站与基准站的距离在10km范围以内时,应用RTK技术对近岸水下地形进行测量具有方便、快捷、精度高等特点,但当此距离超过10km时,其精度则难以保证。杭州湾跨海大桥施工时应用RTK技术进行定位、高程测量,可提高工作效率和成果的质量。

This paper introduces the using of the technique of RTK to topographic survey for Hangzhou Bay Major Bridge, it also provides comparison and analysis for the result gotten by RTK, the error gets from one point would not deliver to the other, and the results coincide with that get from TS(total\|station)etc. So it can be used to replace the second\|class of third\|class traversing and out\|order leveling; When the distance between the flowing station and the reference station is not beyond 10 km the RTK shows a more convenient and more quick character in the under\|water terrain surveying, but when it is beyond 10 km the accuracy could not be guaranteed. In the process of Hangzhou Bay Major Bridge building the RTK must be used in location and altimetric surveying because it can boost the working efficiency and the quality of the achievements.