某水电站库岸边坡变形监测工作基点稳定性分析

Stability Analysis of Deformation Monitoring Operating Control Point of A Certain Hydropower Station Reservoir Bank Slope

某水电站库坝边坡变形监测工作基点历次校测成果差异较大,必须查清工作基点的点位差异是由点位位移引起还是观测误差引起,以便及时改正工作基点坐标。在总结各种工作基点稳定性分析方法的基础上,分别采用限差法、误差椭圆法及实测数据分析研究了某水电站库岸边坡变形监测工作基点的稳定性。结果表明,该电站库坝边坡工作基点在水库蓄水期有显著变形,蓄水期结束后趋于稳定,相关分析方法及思路可为类似工程提供借鉴。

Previous calibration results of slope deformation monitoring point for a certain hydropower station reservoir bank slope are quite different.Therefore,it must distinguish that point difference is due to the work point displacement or caused by measurement error so that we can timely correct work point coordinates.Based on the summing up various operating point stability analysis method,tolerance method,error ellipse method and measured data analysis were used to analyze the operating control point stability of deformation monitoring for a certain hydropower station reservoir bank slope.The results show that the operating control point of hydropower station dam bank slope has significant deformation in reservoir storage period;after the end of the storage period,it has been becoming steady.The correlation analysis methods and ideas can provide reference for similar projects.