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高速铁CP Ⅲ平面控制网的观测量较大且对精度要求极高,对观测量进行粗差探测是十分必要的。为了提高作业效率和节省费用,无砟轨道控制网采用多级布网的方式。由于无砟轨道对测量控制点精度要求很高,所以控制网点位误差必须考虑原始数据误差的影响。根据CP Ⅲ平面控制网的网形特点,利用误差传播理论,推导出纵横向公共边检核条件和纵向附合图形检核条件,控制网点位误差必须考虑原始数据误差的影响。基于检核条件可探测观测值中的粗差,可提高CP Ⅲ平面控制网的精度和可靠性。
The high-speed railway CP Ⅲ plane control network has a large amount of observation and high precision, and it is very necessary to detect the gross error of the observation. In order to improve work efficiency and save costs, ballastless track control network using multi-level network. As ballastless track on the measurement control point accuracy is very high, so control network bit error must take into account the impact of the original data error. According to the network shape characteristics of CP Ⅲ plane control network, error propagation theory is used to derive vertical and horizontal public edge check conditions and longitudinal image check condition. The control bit position error must consider the influence of original data error. Based on the inspection conditions can detect the gross errors in observations, can improve the accuracy and reliability of CP Ⅲ plane control network.