Research On New Method Of High-speed Railway Precisesurvey Network Retest And Data Processing And Analysis During Operation Period

As my country vigorously promotes the construction of high-speed railway rail transit network,the railway mileage put into operation in my country is increasing day by day,and the maintenance of high-speed railway lines during the operation period has become a problem that must be solved.As the survey and design,engineering construction,operation and maintenance of high-speed railways take a long time,and affected by factors such as changes in the external environment and the construction of railway-related projects near the line,the positions of the control points of the precision survey network at all levels may have different degrees of displacement.,or the destruction of control points,which brings great difficulties to the operation,maintenance and repair of high-speed rail lines.Therefore,in order to ensure that the high-speed rail precision measurement network can continue to provide high-precision plane coordinates and elevation datums during the operation period,it is necessary to periodically re-measure it so as to discover and check the absolute and relative position changes of the control points of the precision measurement network at all levels in time.,and timely update the plane coordinates and elevations of the precise measurement network control points at all levels with position changes to meet the needs of track smoothness maintenance and adjustment during the operation period.However,the re-measurement and data processing methods of the high-speed rail precision measurement network in the current operation period have problems such as low work efficiency,high labor cost,and the re-measurement results cannot fully meet the needs of rail operation and maintenance.Therefore,in view of the above problems,this paper conducts an in-depth study on the retesting of the high-speed rail precision measurement network and its data processing and analysis methods during the operation period.The research contents mainly include:Firstly,the current high-speed rail precision measurement network retest and its data processing methods are introduced in detail,and then combined with various problems existing in many domestic high-speed rail precision measurement network retest projects,the current high-speed rail precision measurement network retest and data processing are analyzed and pointed out.The shortcomings of the method lay the foundation for the research and analysis of the re-measurement technology of the high-speed rail precision measurement network during the operation period.Secondly,combined with the various problems and relevant normative requirements during the re-measurement of several domestic high-speed rail precision measurement networks,this paper proposes a new method for the re-measurement and data processing and analysis of the high-speed rail precision measurement network during the operation period,and then introduces the proposed positive measurement network respectively.The application background and technical characteristics of the new method of retesting in the direction and reverse direction and its data processing are analyzed.Finally,the technical advantages of the new method compared with the traditional method are analyzed.Finally,taking some domestic high-speed railway precision measurement network remeasurement projects as an example,the forward and reverse re-measurement and data processing analysis of the high-speed railway precision measurement network during the operation period were carried out.The network retest results were compared with the original test results to analyze the applicability and differences of the two different retest techniques,and also to verify the feasibility of the new method in practical work.