沙坡头水利枢纽北干电站变形监测特性分析

Analysis on Deformation Monitoring Characteristic of Shapotou Water Control Project North Main Canal Hydropower Station

文章以沙坡头水利枢纽北干电站为研究对象,介绍其变形监测设施及原理。典型年份的变形监测数据表明,当前北干电站变形已稳定,坝顶表面变形与气温相关性显著,低温时坝体有向下沉降、向下游变形的趋势,高温时规律相反,坝基变形与下游水位呈正相关关系。激光准直系统与静力水准在8月、10月同时出现异常测值,表明安全监测系统的采集、传输部分存在故障,需及时排查故障,保障系统可靠运行。

Taking north main canal hydropower station of Shapotou water control project as the research object,this paper introduces its deformation monitoring facilities and principles.The deformation monitoring data of typical years show that the deformation of north main canal hydropower station has been stable at present,and the surface deformation of the dam top is significantly correlated with the temperature.At low temperature,the dam body has the trend of downward settlement and downstream deformation.At high temperature,the law is opposite,and the deformation of the dam foundation is positively correlated with the downstream water level.The abnormal measured values of the laser collimation system and the hydrostatic leveling both appear in August and October,indicating that there are faults in the acquisition and transmission parts of the safety monitoring system.It is necessary to check the faults in time to ensure the reliable operation of the system.