摘要
结合超长输水隧洞施工测量的实际案例,通过分析垂线偏差的基本理论,研究垂线偏差对横向贯通误差的影响规律,表明了垂线偏差对观测方向的影响取决于垂线偏差的数值、观测方向的方位角和高度角,从而进一步说明为提高隧道横向贯通精度,应顾及垂线偏差对隧道横向贯通误差的影响,选择较优的后视定向边方案和洞外GNSS控制点布设方案,以确保隧道的顺利贯通。
Based on the actual case of construction survey of super-long water conveyance tunnel,this paper analyzes the basic theory of vertical deflection and studies the influence law of vertical deflection on the lateral penetration error.It shows that the influence of vertical deflection on the observation direction depends on the value of the vertical deflection,the azimuth angle and the height angle of the observation direction,so as to further explain that in order to improve the accuracy of the tunnel transverse penetration.The influence of the vertical deflection on the tunnel transverse penetration error should be taken into account,and the better scheme of the rear view directional edge and the layout scheme of the GNSS control points outside the tunnel should be selected to ensure the smooth penetration of the tunnel.
作者
何金学
HE Jinxue(Institute of Geomatics and Survey Engineering,China Railway First Survey and Design Institute Group Co.,Ltd.,Xi’an 710061,China)
出处
《测绘地理信息》
CSCD
2022年第4期38-41,共4页
Journal of Geomatics
基金
中铁第一勘察设计院集团有限公司科研项目(2021KY01ZD(CZTL)-01)
关键词
垂线偏差
横向贯通误差
影响规律
后视定向边
vertical deflection
lateral penetration error
influence law
rear view directional edge
作者简介
第一作者:何金学,高级工程师,主要研究方向为大地测量、工程测量、摄影测量、地理信息系统。E-mail:329604603@qq.com
