迁江华侨工业区防洪排涝工程控制测量起算点变形浅析

Analysis of control survey point deformation for Qianjiang Overseas Chinese Industrial Park flood control and drainage project

在迁江华侨工业园防洪排涝工程中,利用GPS网的平差成果反算出的两点距离,与通过已有控制点的坐标反算的距离存在较大差值。为此,从长度投影变形和点位的位移两方面分析了差值产生的原因后,采用了两种不同的平差方法,得到了比较好的结果。

For the Qianjiang Overseas Chinese Industrial Park flood control and drainage project, the distance between two points was calculated respectively with the adjustment of GPS network and the coordinate of the existing control points. There is considerable difference between the calculating results out of two methods. The causes for the difference are analyzed, including length projection deformation and displacement of point posi- tion. Two kinds of adjustment methods were adopted, rendering relatively good outcomes.