摘要
南京长江第三大桥是我国首座主塔采用钢结构形式的特大型斜拉桥,其"人"字形钢索塔的安装定位在国内外尚属首次。针对钢索塔立式匹配的技术要求,研究专用测量控制网的构建,测量特征点的布设;阐述全站仪精密三维坐标法的测量方法,并根据匹配区的实际情况及不利观测条件,计算和分析全站仪精密三维坐标法的实测精度。结果表明,测量方法能满足南京长江三桥钢索塔立式匹配测量的精度要求。
Nanjing Third Yangzi River Bridge has been the first cable-stayed bridge in China, whose main tower is the steel structure, and the erection of its ＂∧＂ type comes the first. Aiming at the technology of steel-pylon＇s vertical matching, it presents the establishment of special surveying control network and the layout of surveying point. The way of total station precise 3D coordinate surveying is analyzed, based on actual situations and unfavourable observing conditions of vertical matching surveying area. The results show that the measurement method can meet with the precision requirement of steel-pylon＇ s vertical matching surveying in Nanjing Third Yangzi River Bridge.
出处
《测绘工程》
CSCD
2013年第1期55-58,共4页
Engineering of Surveying and Mapping
关键词
南京长江三桥
钢索塔
立式匹配
三维坐标
精度分析
Nanjing Third Yangzi River Bridge
steel-pylon
vertical matching
3D
precision analysis
