西河水文站水准点稳定性分析

Stability Analysis of Benchmarks at Xihe Hydrometry Station

西河水文站设置有4个水准点,均埋设在冲击层地区。在该地区设置的水准点,即便严格执行《国家一、二等水准测量规范》(GB/T12898-2006)规定的埋石深度和尺寸标准,也很难认为它们是稳定不变的。利用西河水文站1999~2016年8次水准点高程校测成果,采用结点法,对4个水准点的稳定性指标进行分析计算,以期解决西河水文站水准测量工作中引据点选择的随意性,保证用稳定的水准点作为水准测量的引据点,达到既节约测量时间,又提高测量精度的目的。

There are 4 benchmarks at the Xihe hydrometry station,which are located in the area of alluvium.To set up the benchmarks,it is difficult to consider them to be stable even if the standards for the depth and size of the buried stones specified in the Specifications for the First and Second Order Leveling(GB/T12898-2006)are strictly implemented.This paper took the node method to analyze the stability indexes of the 4 benchmarks to avoid random selection based on the 8 times benchmark height calibration results at the Xihe hydrometry station during 1999-2016.This method can save the measurement time and improve the precision of measurement.