Trackless Construction Technology for 160 km/h Metro Based on Coordinate Calculation and Pile Control Network Measurement
In order to guarantee the construction quality of catenary specialty and ensure the good relation between pantograph and catenary,the professional survey and construction of catenary specialty in traditional urban rail transit are usually carried out after the completion of rail laying,which is affected by the construction progress of rail transit everywhere,the construction period of the post-station project is constantly compressed,and the trackless surveying construction technology of catenary emerges as the times require.On the basis of the earlier trackless measurement,the technology uses the trackless measurement calculation software developed by the company to complete the accurate calculation of the coordinates of the hanging points of the rigid catenary,by using total station and CPIII pile control network,the catenary suspension point can be measured accurately,which overcomes the disadvantage of large error of curve segment in earlier trackless measurement.At the same time,the accurate calculation of the length of the suspension column,the angle of the base plate of the suspension column,the installation angle of the suspension column and the installation position of the cantilever on the suspension column can be completed simultaneously,to achieve the catenary hanging column and suspension device assembly installation construction.Through the practical application in Guangzhou Metro Line 18 and Line 22 projects,the applicability and progressiveness of this technology in the construction field of 160 km/h metro catenary are further verified.
rigid suspension catenaryfoundation pile control networktrackless measurementfabricated construction
NETL
NSTL
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