削弱大坝基准线观测误差的一种方法—小基准线法

The Way to Reduce the Error of Measuring Datum Line on the Dam--the Short Sighting Alignment

本文在分析大坝坝顶水平位移测定误差来源的基础上,针对目前通常采用的分段基准线存在的问题,提出用小基准线建立坝顶水平位移的观测方案。文章在对小基准线法优缺点作了概略讨论后,提出了小基准线法及建立中应注意的问题。

This paper analyses error source of measuring horizontal displacement on the dam and points out the problem concerning measurement of horizontal displacement using cut short sighting alignment. Based on it, the arrangement of the measurement of the horizontal displacement on the dam by the short sighting alignment is introduced. It discusses the advantage and defect of the short sighting alignment. Some problems of the arrangement of short slighting alignment are also pointed out.