Abstract: The significance of dam deformation monitoring, not only on new projects but also the automation transformation of old projects, was emphasized here. The deficiency of conventional monitoring points arrangement on dam top for horizontal deformation was pointed out which also exert bad influence on data analysis. By analysis on existing deformation monitoring instruments, it was found that they all had serviceable range and condition that when instrument choosing, actual need should be considered. Referring to the inclinometer and similar instruments for indirect measurement methods, possible precision and change range of the object should be forecasted to meet the require of measurement precision. This paper, at last, stressed the management and maintenance of the automatic monitoring system. Only in this way, data reliability and system operation stability can be guaranteed.

摘要： 指出了大坝变形监测的重要性，阐明了不仅应重视新建工程的变形监测，更应加强老坝的改造及其自动化；通过分析说明了坝顶水平位移“常规”布置的缺陷，及其对资料分析带来的不利影响；分析现有各类变形监测仪器表明，它们均有各自的应用范围和使用条件，应根据工程的实际需求来合理选用；采用间接测量方法的测斜仪和类似仪器，在设计布置时应预计其可能达到的测量精度和测量对象的变化幅度，以期满足资料分析的精度要求；自动化监测系统，特别是变形自动化监测系统的精心管理和维护，是保持测值可靠、系统稳定运行的关键。