高速铁路隧道洞内CPⅡ控制网复测分析与研究

Analysis and Research on Re-surveying of CPⅡControl Network in High Speed Railway Tunnel

根据《高速铁路工程测量规范》的要求,在高速铁路建设及后续运营维护期间,要对精测网进行定期和不定期复测,其中包括隧道洞内CPⅡ控制网复测。文章结合柳南客运专线、南广铁路、渝利铁路和厦深铁路隧道洞内CPⅡ控制网复测项目,对隧道洞内CPⅡ复测的坐标、水平角和边长与原测进行比较和分析,发现若按《高速铁路工程测量规范》中复测指标要求,则水平角和边长复测与原测较差超限较多;若根据测量误差传播定律,将水平角和边长复测与原测较差的限差作调整,并应用于柳南客运专线、南广铁路、渝利铁路和厦深铁路精测网复测中,不仅满足后续CPⅢ平面控制网平差计算要求,同时大大提高工作效率,对今后高速铁路隧道洞内CPⅡ控制网复测相关规范的进一步完善,具有重要的参考价值。

According to requirements of Code for Engineering Survey of High Speed Railway,regular and irregular re-surveying to the precision measuring network,including the re-surveying of CPⅡcontrol network in tunnel shall be per-formed during construction and subsequent operation maintenance of high-speed railway.In this paper,the author com-bines with the re-surveying of CPⅡcontrol network in tunnel of Liuzhou-Nanning,Nanning-Guangzhou,Chongqing-Li-chuan and Xiamen-Shenzhen high-speed railways,compares and analyzes the coordinates,horizontal angle and side length between CPⅡre-surveying in tunnel and the original survey,finds that the horizontal angle and side length be-tween CPⅡre-surveying in tunnel and the original survey are out of the tolerance in great degree according to the re-sur-veying index requirements of Code for Engineering Survey of High Speed Railway;and according to measure error propa-gation law,adjusts the overranging tolerance of horizontal angle,distance between the original survey and re-surveying, and applies it in the re-surveying of the precise survey control network of Liuzhou-Nanning,Nanning-Guangzhou, Chongqing-Lichuan and Xiamen-Shenzhen high speed railways,which not only meets the adjustment computation re-quirements of the plane control network of CPⅢ,but also improves the work efficiency greatly at the same time,and pro-vides the references for the improvement and revision of the related specifications on CPⅡ control network re-surveying in tunnel of high speed railway.