水电站控制网复测与点位稳定性分析  

Point stability analysis and remeasurement of control network of hydropower station

作　　者：陈昌耀 CHEN Changyao(Zhejiang Huadong Mapping And Engineering Safety Technology Co.,Ltd.,Hangzhou 310014,China)

机构地区：[1]浙江华东测绘与工程安全技术有限公司,浙江杭州310014

出　　处：《水利水电快报》2024年第1期28-32,共5页Express Water Resources & Hydropower Information

摘　　要：水电站边坡变形监测对于工程安全运行至关重要,控制网复测与点位稳定性分析是变形监测的基础。以浙江省仙居抽水蓄能电站控制网复测与点位稳定性分析为例,介绍了一级边角网水平角、边长、天顶距观测技术和方法,对观测数据采用测站平差计算、水平角中误差计算、边长观测结果改正计算、三角高程概算等预处理,并检验了观测数据的粗差、控制网粗平差、精密三角高程网平差、平面控制网平差等以判定测量精度,采用平均间隙法和单点位移分量法对控制点稳定性进行分析。结果表明:仙居抽水蓄能电站控制网采用的技术方法能够满足国家一等三角网精度指标,控制网点位误差和误差椭圆均符合精度要求;除TN01点未通过动点检验外,其余点均通过了稳定性检验,没有明显位移变化。Slide deformation monitoring of hydropower stations is vital to the safety operation of the project.The analysis of control network remeasurement and point stability analysis is the basis of deformation monitoring.Taking the Xianju pumping energy storage power station in Zhejiang Province as an example,the control network was remeasured and the point stability was analyzed.The horizontal corner,length of side,and sky-long observation technology and methods of the first-level corner network were introduced.Observation data were pre-processed by station adjustment calculation,horizontal angle error calculation,length observation results correction calculation,triangular elevation estimation,etc.The rough differences,rough flat difference between the control network,precision triangle high-profile mesh,and the flat control network level of observation data were tested to determine the measurement accuracy.The average gap method and single-point displacement component method were used to analyze the stability of the control point.The results showed that the technical method adopted in Xianju pumping energy storage power station can meet the national first-class triangular network accuracy indicators,and the control outlet position error and error elliptical can meet the accuracy requirements.Except for the TN01 point not passed the dynamic point inspection,the remaining points had all passed the stability test with no significant displacement.

关 键 词：控制网复测 稳定性分析 平均间隙法 单点位移分量法 

分 类 号：TV743[水利工程—水利水电工程]