Two new techniques for measurement of vertical stiffness of railway tracks

This article focuses on determining track performance by means of two different methods: the High Speed Deflectograph, which is mainly used for determining the track modulus of subgrade, and thus applied on ballasted track structures; and the Hammer Excitation Test, which is used for determining the track modulus of structures featuring elastic layers such as rail and base plate pads, embedded rails and ballast. Both techniques yield unbiased quality values, which facilitate maintenance decisions/actions and choices in design. Both techniques, though they can be applied separately, offer specific complementary benefits. The working principles of the techniques are illustrated. For the covering abstract see ITRD E125214.


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  • Accession Number: 01011753
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-947644-43-1
  • Files: ITRD
  • Created Date: Dec 19 2005 3:29PM