西北水电Issue(3)：21-25,41,6.DOI:10.3969/j.issn.1006-2610.2024.03.004
大坝一等水平位移监测网数据处理流程及精度保障措施
Comparative Analysis of 3D Laser Scanning and Nap-of-the-Object Photogrammetry in Slope Protection Networks Measurement
摘要
Abstract
The horizontal displacement monitoring network of dams is the plane benchmark for dam deformation monitoring.The reliability of the dam deformation monitoring results and the conclusion of the dam safety evaluation are subject to the precision of the monitoring network.In order to improve the data processing accuracy of the monitoring network,relying on the re-survey of the dam monitoring network of large-scale hydropower stations,the influence of relative humidity,slope distance flattening method,and earth curvature radius on the modifica-tion of side length is studied and analyzed.The results show that the maximum influence of relative humidity correction on side length can reach 2 ppm,the side length calculated by height difference in slope distance flattening is0.05～1.95 ppm higher than the side length calcu-lated by vertical angle,and the maximum influence of using the average curvature radius of the earth in the survey area instead of the earth curvature radius of the normal section line at the distance measurement side on the projected side length can reach 0.08 ppm;when process-ing the data of the high-precision monitoring network for dam horizontal displacement,relative humidity should be used to correct the meas-ured side length,and the slope distance flattening of height difference shall be adopted.The average curvature radius of the earth in the sur-vey area can be used instead of the earth curvature radius of the normal section line at the distance measurement side.The study results can provide reference for similar projects.关键词
水平位移/监测控制网/相对湿度修正/折光系数/地球平均曲率半径Key words
Horizontal Displacement/Monitoring Network/Relative humidity correction/Refraction Coefficient/Earth average Curvature Radius分类
交通工程引用本文复制引用
刘明波,巨天力,李晓鸽..大坝一等水平位移监测网数据处理流程及精度保障措施[J].西北水电,2024,(3):21-25,41,6.基金项目
中国电力建设股份有限公司重点科技项目(KJ-2023-022)、中国电建集团西北勘测设计研究院有限公司科技项目(XBY-YBKJ-2023-23). （KJ-2023-022）
