变形观测数据处理平差模型设计

Adjustment module design in processing the observations of deformation surveys

变形分析的关键在于确定一个合适的基准,使由此所计算的位移量尽可能接近实际变形.平差模型的选择建立在点位稳定性分析的基础上,在实际应用中应用较多的是平均间隙法.该方法是假定两期观测之间不存在系统误差,两期观测值之间误差独立.实际观测中,各期观测值之间往往含有系统误差,考虑系统误差的影响,对使用的统计量进行改进,利用改进后的统计量进行点位稳定性分析,结合文献中一算例,指出原有结论的局限性,证明了改进后的统计量可提高变形分析的灵敏度.

The main task of deformation analysis is to determine the applicable foundation and to compute information value.Choosing adjustment module is based on the test of the steady points.The method of mean gap is mainly applied to actual work. It is based on facts that error is independent and has no system at all between twice-period observations. In fact,there is system error in all kinds of observations.In consideration of systematic error,the statistical value is improved,an example of the leveling networks with twice-period is given.It is proved that it may increase the sensitivity of deformation analysis after statistical value improved is used.