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探讨了在高层建筑施工测量中采用内控法投测轴线后所构成矩形投测网的检测精度指标，推导了这种矩形网简化的平差计算公式，说明了这一方法和直接作秩亏自由网平差的一致性，并指出该方法更具有实用性。
The inspection accuracy index of the rectangular investment test network constructed by using the internal control method to measure the axis in the construction measurement of high-rise buildings was discussed. The simplified calculation formula for the adjustment of the rectangular network was deduced, and the method and the direct loss-free calculation were illustrated. The consistency of network adjustment, and pointed out that this method is more practical.