MEASURING AND CORRECTING OF THE TRACK GEOMETRY

Track maintenance is at present done almost entirely with tamping, levelling and lining machines. For the planning of this work, the Netherlands Railways (NS) use the measured results obtained with the French-built Mauzin recording car. The measurement signals, which are stored on a magnetic tape during the measuring run are subsequently evaluated in a PDP computer. The standard quality analysis consists of the calculation of standard deviations over track lengths of 200 metres, while for short test sections a Fourier analysis is also made. For the planning of track maintenance work, it is not only the absolute track quality which is of importance, but also the degree or rate of quality deterioration. The latter calls for high measuring accuracy and good reproducibility of the measurement signals, which is still a problem with many recording cars. In order to assess the work of track maintenance machines on the basis of fixed points or equalization, the measuring range of the recording car must be sufficiently large, i.e., up to wave lengths of at least 50 metres. Only a few recording cars, such as those of British Rail, are capable of this. For proper planning of track maintenance, one must also know the extent to which the maintenance machines improve the track quality. There is also the question of whether the machine is to work on the fixed-point or equalization system, and also whether it would be profitable to use laser equipment. These matters have been examined both theoretically and experimentally in the ORE expert Committee D 117, and some of the results as well as the main conclusions are presented in this article.

  • Corporate Authors:

    Hestra Verlag

    Holzhofallee 33, Postfach 4244
    6100 Darmstadt 1,   Germany 
  • Authors:
    • Esveld, C
  • Publication Date: 1980-5

Language

  • German

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00319998
  • Record Type: Publication
  • Source Agency: British Railways
  • Files: TRIS
  • Created Date: Nov 29 1980 12:00AM