港珠澳大桥首级控制网四期测量成果比较与分析

Comparison and analysis on four times of measurements of first order control network for Hong Kong-Zhuhai-Macao Bridge

在主体工程开工前,港珠澳大桥首级控制网完成了四期观测。通过对四期测量成果的比较分析,进一步验证了控制网的测量精度,评定了控制点的稳定性。本文运用误差分析理论和方法,制定了首级控制点工程坐标、观测高差及高程较差的限差标准,用以评定控制点稳定性,可供后续各期复测及其他类似跨海工程控制网参考。

Four times of measuring the first order control network for Hong Kong-Zhuhai-Macao Bridge have been finished ahead of the construction of the main works of the project. Through comparison and analysis on the four times of measurement results, the accu- racy of the control network was validated and the stability of the control points was assessed. Using the error analatical methods, the limit error standards of the comparison error of the engineering coordinates, the measuring height difference and the elevation were con- stituted, which could be used in the latter repetition surveyings and other similar over-sea engineering control networks.