Study On The Technology Of Track Pecision Adjustment During Jiont Debugging And Testing In Yungui Railway(Baikun Track Division)

New constructed high speed railway need to be dynamic detected with joint debugging and testing before its operation.It improves track dynamic precision,optimizes track structure and ensures pass the dynamic test acceptance.This thesis’ s study object is the track dynamic adjusting technology which is applied to Yungui railway(Baikun track division)CRTSI double-block ballastless track and ballast track.The research contents the work flow,organization,quality analysis and the dynamic index values.(1)The dynamic adjustment of track during joint debugging and testing mainly contents a few parts which are the analysis of test data,marking of the problematic division,field precision measurement and status check,developing and application of precision adjustment of track.This thesis also concludes the theory of precision measurement,the theory of precision adjustment and the control standards of track statues and dynamic response.(2)The work flow and main contents of field absolute and relative measurement are studied and the principles of precision adjustment of both test methods are developed.The work flow and contents of manual adjustment of ballastless and ballast track as well as precision adjustment using big machines which is applied to ballast track are also studied.(3)To deal with the ballast track dynamic wavelength ultralimit,track alignment irregularity or bad curvity in curve line and the divisions where length of overrun variance with respect to class I and above are beyond 200 meters,the precision adjustment using big machines are recommended.With respect to the diseases of dynamic irregularity wavelength under 10 m detected by comprehensive monitoring train,untralimit of single point and so on,manual precision adjustment are recommended.The comprehensive adjustment for ballast and the ballastless transitional sections includes the large difference of the stiffness of the track foundation,the different types of fasteners and the difficulty for maintaining rail surface elevation in the ballast section.The comprehensive adjustment through the clear operation standards,precise measurement and positioning,and fine tamping operations proves effective.The difficulties in adjustment of ballast track turnout include the difference of track surface elevation between the turnout and the railroad,the lack of close contact between the switch rail and the nose rail,and so on.(4)Some big values of wheel unloading rate and wheel-rail force were detected in some places in Yungui railway(Baikun track division).Before and after these places 50 meters,the items of track alignment,weld flatness,gap between fastener components,clamping force of fastener,unsupported sleeper were all checked.As the overrun of track alignment(mainly manifested as short wave vertical irregularity)and bad flatness of weld(high weld),the single peak value of wheel unloading rate is out of standard value.In order to solve the problem,track precision adjustment and high weld buffing in field are recommended.