国家会议中心二期工程测绘案例

Surveying and Mapping Case of the Second Phase Project of the National Conference Center

论述了国家会议中心二期工程放样测绘的方案设计与施测案例。对后方交会成果与GPS静态和导线平差的结果进行对比,对施测成果和站点坐标解算精度进行了分析;采用后方交会的方法,对基坑内轴线控制点、细部构件平面位置进行测设。通过分析,其精度远大于极坐标法放样,且能保证各区段轴线精准闭合。该方法保证了后方交会在大跨度基坑工程应用中的可靠性。

This paper discussed the scheme design and case of lofting survey in the Second Phase Project of National Conference Center,compared the results of rear rendezvous with the results of GPS static and traverse adjustment,analyzed the results and the accuracy of site coordinate solution.The method of rear intersection is used to survey and set the inner axis control points of the foundation pit and the plane position of the detailed components.Through analysis,its accuracy is far greater than that of polar coordinate lofting,and it can ensure that the axis of each section is accurately closed.This method demonstrated the reliability of rear rendezvous in the application of large span foundation pit engineering.