区域地面沉降水准监测网参考基准点的合理选取，直接影响到沉降监测信息的准确性与可靠性，不同的起算基准，获取的沉降信息会存在差异。文中采用秩亏自由网平差算法计算水准网高差改正数及平差高程值，进而利用平均间隙法与单点检验法相结合，对参考基准点的稳定性进行评价，确定变形模型。最后结合算例对该方法进行了验证，形成了一套适于工程化应用的基准点稳定性分析方法与流程。%Reasonable selection of regional land subsidence monitoring network reference datum, wil directly affect the accuracy and reliability of the subsidence monitoring information. Since selection of different reference datum, the settlement of information wil vary. This paper uses the free network adjustment algorithm to calculate the leveling network correction and adjustment of elevation values, and then using the mean spacing method and the single point inspection to evaluate the stability of the reference datum, then determine the deformation model. Final y combining the example of the method are veriifed, formed a set of suitable for engineering application of reference datum stability analysis method and process.
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