摘要
针对港珠澳大桥沉管隧道的安全贯通问题,该文从隧道外GPS网的布设及施测方法出发,通过多期复测数据评价GPS网具有可靠的测量精度;通过对GPS网点的稳定性分析,阐明了沉管隧道地面控制点位无法长期保留、稳定性差的特点;最后就GPS网引起的贯通误差影响值进行了估算。
The HongKong-Zhuhai-Macao Bridge is an ongoing construction project which consists of a series of bridges and immersed tube tunnel crossing the Lingdingyang channel that will connect Hong Kong,Macao and Zhuhai.For the immersed tube tunnel,the establishment from the laying out to surveying of surface ground GPS network was discussed in this paper,and its reliable measuring accuracy by multiphase reiteration data was evaluated.Through analyzing the stability of the GPS network,the characteristics that the surface ground control points cannot be long-term reserved and tend to be unstable was illuminated in immersed tube tunnel.Finally the breakthrough error caused by GPS network was estimated.
出处
《测绘科学》
CSCD
北大核心
2016年第12期10-13,共4页
Science of Surveying and Mapping
基金
国家自然科学基金项目(41274020)
关键词
沉管隧道
GPS网
稳定性
贯通误差
immersed tube tunnel
GPS network
stability
breakthrough error
