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介绍了忠县长江大桥控制网采用GPS测量定位技术和传统的测距、测角定位技术两种不同的方法对主桥控制网进行测量和复核,保证了大跨度桥梁控制网的准确和高精度;提出将控制网大地坐标系,转化成有利于施工控制测量的自定义施工坐标系,在控制测量过程中获得很好的效果;运用锚碇系统的定位测量、浮式平台的定位测量、钢吊箱的定位测量、成桩后的竣工测量进行主桥基础施工测量,采用高精度全站仪在不同的施工阶段采用不同方法,不仅保证了施工质量,而且满足了施工进度,对于类似桥梁的施工测量具有借鉴意义。
The control network of Zhongxian Yangtze River Bridge is introduced to measure and review the control network of the main bridge by two different methods: GPS measurement and location technology and traditional ranging and angle measurement technology, so as to ensure the accuracy and precision of the control network of the long-span bridge It is proposed that the control grid geodetic coordinate system be transformed into a self-defined construction coordinate system that is beneficial to the construction control measurement, which has good effect in controlling the measurement process. The application of the anchorage system positioning measurement, the floating platform positioning measurement, the steel Positioning and measurement of the pylon, as-built survey after completion of the main bridge foundation construction survey, the use of high-precision total station in different stages of the construction of different methods, not only to ensure the construction quality, but also to meet the construction schedule for similar bridges Construction survey has reference significance.