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本文结合工程实例,讨论用拟稳平差法进行变形分析时,变形监测网的网形结构对网点稳定性检验结果的影响。研究表明,当网中拟稳点组无法独立构成网形时,其余动点的位移将对拟稳点在各观测周期间的坐标值变化产生影响,致使其点位的稳定性分析结果受到扭曲。当网中动点的位移具有趋向性时,这种影响尤为显著。
Based on the engineering examples, this paper discusses the influence of the network structure of the deformation monitoring network on the test results of the stability of the network when the deformation analysis is carried out by means of the quasi-stationary adjustment method. The results show that when the quasi-stationary point group in the network can not form a net shape independently, the displacement of the other moving points will affect the change of the coordinate value of the quasi-stationary point during each observation period, resulting in distorted results of the stability analysis of the point . This effect is particularly significant when the displacement of the moving point in the net has a tendency.