摘要
在大型桥梁工程控制网布设中,因江河影响,采用精密测距三角高程法观测,形成地面与跨江水准混合网。针对地面与跨江水准混合网平差时,需要解决不同种类观测值如何定权以及跨江水准联测后如何检验两岸基准点可靠性等关键问题,通过在自由网中选取跨江水准两类不同权值进行平差计算,推证跨江测距三角高程采用距离平方倒数定权的合理性;应用Helmert方差分量估计定权解算后,证明此方法提高混合网平差精度的有效性,并进一步采用方差一致性检验和符合路线法相组合,验证了跨江水准联测的可靠性。
In the laying of large-scale bridge engineering control network,due to the influence of rivers and the characteristics of precise ranging triangular height method,the ground and cross-river standard mixed network was formed.In view of the adjustment of ground and cross-river standard mixed network,it is necessary to solve the key problems of how to weigh the different kinds of observation values and how to verify the reliability of the benchmark points on both sides after the cross-river standard translocation,and the adjustment was calculated by selecting two different types of weights of cross-river standard from the free network to justify the retionality of using distance inverse square to weigh in the cross-river ranging triangle height,and after using Helmert variance component to estimate the solution to adjustment,it was proved that this method improved the validity of the accuracy of the mixed network adjustment,and the combination of variance consistency test and route method were further adopted to verify the reliability of cross-river standard adjustment.
作者
钱龙
黄腾
赵仲荣
蔡宁
嵇卉
Qian Long;Huang Teng;Zhao Zhongrong;Cai Ning;Ji Hui(School of Earth Science and Engineering,Hohai University,Nanjing 211100,China;(2.School of Surveying Science and Engineering,Shandong University of Science and Technology,Qingdao 266590,China)
出处
《甘肃科学学报》
2020年第1期10-13,共4页
Journal of Gansu Sciences
作者简介
钱龙(1994-),男,江苏宿迁人,硕士研究生,研究方向为精密工程测量和变形监测。E-mail:422184147@qq.com。
