Research On Changing Rules Of Track Geometry After General Overhaul For Heavy&Quick Line

Existing line is the railway line for mixed passenger and freight traff,the freight-train's axle load is very large, the action frequency of load is many times, the track geometry behavior change fast, but the running of the fast-run passenger-train and the heavy haul wagon will play a big damage on the track, so, the method of rail maintenance need to advance mechanization degree. Currently, the manners of our rail maintenance are under the condition of small manpower machine coexist with big track maintenance machine, advancing continuously big track maintenance machine's proportion is the inevitable path that our country developing heavy haul fast railway. So, knowing the effect that big maintenance machine playing on the change rule of fast line's track geometry behavior will well control the geometry status of our country's busying main line, also give guidance to rail maintenance.On basis of the research work of specialists from home and abroad, at the first, this paper describe the status of track irregularity before maintenance and put forward two models to describe it: deterioration model and restoration model, this paper also computed the track inspection vehicle data using RTSTMIS, drew a conclusion for the change of track geometry behavior after maintenance; at the second, through the research of track geometry irregularity distribution rule, we can get the whole rule of line condition after maintenance. Lastly, this paper analyzed the track geometry irregularity using three methods of largest value, PSD, O.M.Through the work above, this paper can drew a conclusion as follows:(1) We can get the development condition of the line by the analysis of track geometry behavior's deterioration model and restoration model.(2) The conclusion that the track geometry irregularity should obey the GAUSS distribution.(3) PSD can better reflect the distribution feature of track irregularity corresponding to the irregularity wavelength than the method of largest value, the new method O.M can well evaluate the track status of unit division after maintenance.