摘要
目的利用GPS对超长大坝垂向变形进行监测，为获得大坝监测点精确的垂直位移．方法通过优化高精度GPS分析软件中各种误差改正与精密解算模型，对参数选取进行实验以获得最优解算参数组合；利用二等水准测量结果，对GPS监测结果进行检验分析．结果得到的GPS监测变形量与水准测量变形量差值中误差〈1mm，且GPS所测大地高变形量与二等水准测得的变形量间存在一个较小的系统偏差，其值在0．5—1mm之间，该系统偏差不影响垂向变形监测的结果．结论平原地区超长水坝可用GPS监测代替精密水准测量对坝区的垂向变形进行监测．
This paper mainly focuses on GPS height data processing method for deformation. The ellipsoidal height accuracy is improved by optimizing various error correction and accurate calculation models of high precision GPS analysis software and selecting solution parameters in GPS data processing. The GPS monitoring result is appraised by the second - order leveling surveying. We found that the mean square error of difference value between GPS monitoring deformation and the second - order leveling surveying deformation is less than l mm, and there is a smaller systematic error between the ellipsoidal height deformation and the second - order leveling deformation, whose value is about 0.5 - 1 mm; however, this system error does not affect the outcome of vertical deformation monitoring. The conclusion is drawn that the GPS monitoring can replace precise leveling in ultra -long dam vertical deformation monitoring in plain region.
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2009年第1期39-43,共5页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金项目(40571137)
国家863课题项目(2006AA12Z216)
关键词
垂向变形监测
误差改正模型
超长多折线水坝
GPS解算参数选取
vertical deformation monitoring
error correction model
ultra - long and multiple broken lines dam
parameters selection in GPS solution
