全站仪精密三维坐标法在钢索塔施工测量中的应用

Application of Total Station Precise 3D Coordinate Surveying in Construction Survey of Steel-pylon

文中介绍了钢索塔架设的精度要求;阐述了全站仪精密三维坐标法的测量方法,并根据桥位区的实际情况及不利观测条件,计算和分析了全站仪三维坐标法的实测精度,并对提高测距精度的措施进行了论述。结果表明该测量方法能满足南京长江三桥钢索塔架设平面控制的要求,但达不到高程控制的精度。

In this paper,the author introduces the precision required of the steel-pylon's erection,expatiates the method of total station precise three-dimensional coordinate surveying,while calculates and analyzes the measurement accuracy of total station three-dimensional coordinate surveying according to actual situations and adverse observing conditions of construction area,and discusses the measures to improve the ranging accuracy.The results show that the measurement method can meet the erection plane control requirement of Nanjing Third Yangzi River Bridge steel-pylon,but don't reach the vertical control accuracy.