武汉鹦鹉洲长江大桥基准索股定位测量

Positioning Surveying of Wuhan Yingwuzhou Yangtze River Bridge Datum Wire Strand

设计了一种专用观测工具——棱镜安置器,采用单向三角高程测量方法进行基准索股定位,能很好地解决武汉鹦鹉洲长江大桥因施工现场受地形、气候条件影响,无法采用精密水准测量和对向三角高程测量进行基准索定位测量这一技术难题,对其他类似桥梁建设也具有指导和借鉴意义。

Because the construction site is most affected by the topography, climatic conditions, and the bridge across the Yangtze River both banks, the datum wire strand position measuring can't use the methods of the precise leveling and double-direction triangle elevation surveying. In order to solve this problem, this paper designed a special observation tool, which called prism positioning device. This tool could achieve good results by using single-direction triangle elevation surveying method with the device in position measuring of datum wire strand, which was a very good solution to this problem.