摘要
斜拉桥主塔索锚系统定位测量是一项精密工程测量,普遍存在塔高、远离岸边控制点的特点,影响测量成果质量的因素很多,定位测量精度难以保障。在建立桥梁施工控制网、主塔线性监测的基础上,采用一定的技术手段,将平面坐标基准、高程坐标基准传递至主塔待施工段,根据测量部位的精度要求、仪器通视条件,选用全站仪绝对设站法、相对设站法或全站仪与垂直投点相结合的方法,实现索锚系统施工快速、高精度定位。
The positioning measurement of cable anchor system of cable-stayed bridge is a precision engineering survey.There are many characteristics,e.g.,tower is height and far away from the control point of shore.Many factors affect the quality of measurement results,and the accuracy of positioning measurement is difficult to guarantee.On the premise of the complex measurement and encryption of the control network and the linear monitoring of the main tower,a certain technical means is used to transfer the reference datum of the plane coordinates and the datum of the elevation coordinate to the construction section of the main tower.According to the precision requirements of the measuring parts and the general conditions of the instrument,the absolute station method of the total station,the relative station method or the full station instrument and the vertical input point are selected.A combined method is adopted to achieve quick and high-precision positioning of cable anchor system.
作者
崔巍
CUI Wei(The Fourth Engineering Company of China Bridge Engineering Group CO.,Ltd.,Nanjing Jiangsu 210031,China)
出处
《现代测绘》
2019年第1期57-59,共3页
Modern Surveying and Mapping
关键词
变形监测
基准传递
绝对设站法
相对设站法
deformation monitoring
datum transfer
absolute station method
relative station method
