Research On Network Building Model And Algorithm For Precision Network With Constrained Deviation Of Existing Railway Lines

During the period from 1997 to 2007,The train running on ordinary railway line has been speeded up six times in China,and the speed of existing lines has become an effective way to alleviate the pressure of railway transportation.With the rapid development of high-speed railway in China,the superiority of the measurement and control concept of railway track coordinate method is gradually accepted and recognized by the industry.The contradiction between the existing line speed and the rapid maintenance of the railway line is becoming more and more prominent.In view of China's existing line Pu-speed line labor intensity,poor measurement accuracy,low efficiency,precision and unreliable inspection and maintenance status.The method of measuring the transverse offset of the line using the SGJ-TW-EBJ-3 type orbit gauge,which has been universally accepted,and the method of controlling the absolute position of the track and the overall linear shape,need to be based on the line pile control network.In this paper,we have not carried out the construction work,the concrete method and the related algorithm of the existing line foundation pile control network in our country.To solve the existing line of speed and fast lines for absolute position control and supervision of the main issues,lay the theoretical basis.The main contents of this paper are as follows:(1)The paper puts forward the general idea and technical conception of the existing line deviation constraint precision measurement,and studies the network construction scheme,the network measurement and the inspection and maintenance plan of the precision network.(2)Establishment and Maintenance of Standard Offset Data.When the line is in the ideal state,use the constraint type orbit gauge to record the deviation and control of the deviation between the control point and the center line of the vertical and lateral deviation,when the deviation constraint control point changes,the need to evaluate the bias constraint network and And according to the results of the retest,update the corresponding data in the standard offset database.(3)Research on Network Measurement Algorithm.Research on Coordinate Screening and Optimization Algorithm,Coordinate Rotation and Matching Adjustment Algorithm and Coordinate Lap Error Processing Algorithm Research.(4)Complete the network measurement and management software design.The design and implementation of a set of deviation measurement network measurement and management software can realize the functions of coordinate measurement and storage under independent coordinate system,data analysis and processing,network update and data export.(5)Error analysis of bias constrained precision network,analysis of line test and evaluation of network.