Abstract: The difference in the method between automatic monitoring and manual observation for damdeformation monitoring system was indicated. It discussed that the build method of automatic monitoring systemfor wire alignment in dam. Explained it was unadvisable to try to use bidirectional wire alignment for monitoring vertical displacement up to now. It showed by analysis that the accuracy of wire alignment systemwould be obviously lower when the ended point extended, and the extended disposal of the ended point should avoided when the wire alignment longer. The liquid multi- point leveling with bio- metal tube mark using method of difference measurement were a agility and convenient automatic monitoring system for high accuracy vertical displacement of dam. The accuracy of inclinometer and pendulum was showed by comparison and analysis, the idea that trying to replace pendulum using inclinometer was unadvisable.

摘要： 指出了大坝变形监测系统中自动化监测与人工观测方法的差异, 对引张线自动监测系统的构建方法进行了论述;通过分析说明了试图采用双向引张线监测垂直位移尚不可取; 分析表明, 引张线端点外延将明显降低引张线准直系统的精度, 长的引张线应避免采用端点外延布置; 采用相对测量方法、配合双金属管标的液体静力水准系统是一种灵活、简便的高精度垂直位移自动化监测系统; 分析比较测斜仪和垂线的精度表明, 试图利用测斜仪来取代垂线的想法是不可行的。