Abstract: Due to the benefits of high precision, wide scope of monitoring and reliable measurement values, the hydrostatic levelling system has been widely used in the dam settlement monitoring. This paper mainly introduces the working principles of the hydrostatic levelling system and the factors affecting the measuring accuracy. Combined with its application in a diversion type hydropower station, the monitoring data as well as the influence of temperature on monitoring data are analyzed. Moreover, the key points in installation is presented, for reference.

Key words: settlement monitoring, measuring accuracy, temperature, installation

摘要： 静力水准仪具有精度高、监测范围广、测值可靠等优点，被广泛运用在大坝沉降监测工作中。笔者介绍了静力水准系统工作原理及影响静力水准系统测量精度的主要因素，结合其在某引水发电式水电站中的应用，对其水准监测数据进行分析，重点研究了温度因素对监测结果的影响，总结了该系统在安装中的相关注意事项。

关键词: 沉降监测, 测量精度, 温度, 安装