高铁无砟轨道CPⅢ控制网测量

Measurement of CPⅢ Control Net for Ballastless Track of High-speed Railway

研究目的:根据无砟轨道施工对平顺性要求,研究了为满足施工要求CPⅢ控制网的网形布设、施测方法。研究了为满足施工要求对CPⅢ控制网定位精度要求及CPⅢ控制网点位相对中误差及可重复测量误差精度控制指标,从而明确CPⅢ控制网点位的误差,最终为满足无砟轨道施工对平顺性要求提供测量保障。研究结论:(1)CPⅢ控制网网形采用沿线路均匀布设、施测方法采用多方向后方交会,对于控制CPⅢ网点间相对中误差具有重要作用。(2)CPⅢ控制网点位相对中误差及可重复测量误差精度控制,能满足轨道施工高平顺度要求。

Research purposes： According to the construction of Ballastless ride request,studying network layout and survey methods of CP Ⅲ control for meeting the construction requirements for.Studying to meet the construction requirements of the CP Ⅲ control network location accuracy requirements and CP Ⅲ Control Network relative error and repeatable measurement error precision control indicators,which explicitly CP Ⅲ Control Network error,and ultimately to meet the non-ballast track construction on the smoothness requirements Measurement of protection provided.Research conclusions：（1） CP Ⅲ control network is installed evenly along the railway and the multiple-direction intersection in rear is adopted in the measurement.This is crucial to control of the relative error between measurement spots of CP Ⅲ control network.（2） The relative error between measurement spots ofCP Ⅲ Control Network and the repeatable precision control of the measurement error can meet meet the requirements of the track regularity.