Construction and Optimization Method of High Speed Railway Beidou Datum Control Network
Aiming at the problems of high investment cost and long survey period when the high speed railway engineering survey control network is constructed and maintained by traditional survey methods,this paper proposes a scheme for constructing high speed railway Beidou datum control network based on Beidou continuous operation reference station.According to the strip distribution characteristics of railway control network,this paper proposes to comprehensively utilize external reference stations for network integration and construction,and optimize the integrated station network through the processes of station screening,baseline length control and local network type adjustment.Taking Xuzhou-Nanjing Section of Beijing-Shanghai HSR as an example,the network type coefficient is used as the evaluation index to verify the effect of the optimization method.The optimized network type eliminates the triangular network with abnormal structure,increases the minimum network type coefficient from 0.04 to 0.32,and reduces about 31％of external site access,effectively reducing the access cost.
high speed railwayBeidoudatum control networkreference stationcontrol network constructionnetwork type optimization
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