CPⅢ平面控制网观测方法研究

摘要

High-speed Rail measurement is the basis of High-speed Rail construction work .At present some problems existed in High-speed Rail measurement such as the low efficiency and long working time .Some survey data which come from a high-speed rail CPⅢ plane control network are divided into semi-observed data and the processed results are adjusted again with fixed points and with soft fixed points in this article .By comparing and analysis the precision index of adjustment results ,it is proved that the method of surveying with semi-observed modes conform with the “Engineering measurement specification for high-speed railway” and it can replace the method of one circle measured mode .%高铁测量是高铁建设的基础性工作，目前高铁测量工作中存在效率低、工作时间长等问题，文章将某高速铁路CPⅢ平面控制网实测数据分成半个测回进行处理，并对半测回数据分别进行约束平差和置平，比较分析平差结果的各项精度指标，确定使用半个测回观测的方法能够满足《高速铁路测量规范》的要求，能够替代一个测回观测CPⅢ的方法。