高铁单点交错轨道平面和高程控制网测设新方法研究

为提高高速铁路轨道控制网(CPⅢ)建网及复测的效率,提出单点交错形式三维CPⅢ控制网测设新方法。该方法采用单点交错的布点方式,较点对形式的CPⅢ控制网CPⅢ控制点数量减半;该方法采用全站仪一次测量同时构建CPⅢ平面网和CPⅢ三角高程网,测量效率显著提高。为验证该方法的精度及可行性,对某段高速铁路CPⅢ控制网实测数据进行计算实验。结果表明,该方法求得的坐标与传统点对形式的CPⅢ控制点坐标的较差落入-1 mm,1 mm]区间的概率为98.9%,求得的高程与矩形法水准高程的较差落入-3 mm,3 mm]区间的概率为97%,说明按照本文方法构建的CPⅢ平面网及CPⅢ三角高程网,均满足高铁CPⅢ控制网的精度要求。

The New Surveying Method of Single Point Interleaved Horizontal and Vertical Control Network for High-speed Railway Tracks

In order to improve the efficiency of the construction and re-measurement of the high-speed railway track control network( CPⅢ),a new surveying method of single point interleaved three-dimensional CPⅢ control network is proposed. As compared with the normal CPⅢ control network,the number of control points in this study is half reduced by placing them in an interleaved pattern.The CPⅢ horizontal network and CPⅢ trigonometric vertical network are constructed by one-time total station survey,and the surveying efficiency is greatly improved.In order to verify the accuracy and feasibility of this method,a computational experiment is carried out by using the measured data of CPⅢ control network of a high-speed railway. By comparing the difference between the coordinates obtained by this method and the traditional point pair form CPⅢ horizontal network,the probability of the differences falling into the-1 mm,1 mm]interval takes up 98.9%. The probability of the difference between the elevation obtained by this method and the rectangular method falling into the -3 mm,3 mm]interval takes up 97%.It demonstrates that the CPⅢ horizontal network and the CPⅢ triangular vertical network constructed in this method can meet the precision requirements of the high-speed railway CPⅢ control network.