单侧形式CPIII平面网测量的可行性研究
The feasibility research of the one-tailed CPIII plane network measurement

运营中的双线铁路在维护过程中,运营天窗可能为非垂直天窗,在此情况下为了实现CPIII平面网的外业测量,提出采用一种单侧形式运营双线铁路轨道控制网(下文简称CPIII网)的测量方法。不同于传统的轨道控制网测量,该方法只对靠近左线(或右线)的CPIII点进行构网测量,并联测左侧(或右侧)的CPI或CPII控制点,即构建单侧形式的CPIII平面网观测网形。通过CAD仿真数据的计算实验以及实测数据的平差计算,对单侧形式的CPIII平面网外业测量网形及其精度情况进行计算分析。研究结果表明,这样的单侧CPIII网平面精度能够满足高速铁路工程测量规范相关的精度要求。
During the maintenance process of the operated double-track railway, the skylight may be non-vertical skylight. In order to perform the filed survey of the CPIII plane network, a one-tailed measurement method of the CPIII of the double-track railway was proposed. Compared with traditional CPIII measurement, this method just measures the CPIII points and the CPI or CPII points near the left or right line, which constructs the plane measurement network of one-tailed CPIII. Through the CAD simulating calculation and the adjustment of measured data, the computation analysis has been conducted for the network and precision of one-tailed CPIII plane network. The studied result shows that the plane precision of this network can meet the requirements of high-speed rail project measurement accuracy specification