Combination of NDT techniques for site investigation of non-ballasted railway tracks

There is today in civil engineering a great need for quantitative non-destructive testing (NDT) methods that are easy and fast to apply and whose data are easy to interpret. Their use is required on site both for evaluation of existing structures/infrastructure and for quality control in new construction. BAM has carried out in-situ feasibility studies in this field, using radar, impact-echo and ultrasonic-echo methods. Examples of combined applications on site of high frequency radar antennae, scanning impact echo and ultrasonic array are given for two different railway slab-track constructions. The aim of the study was to define limitations and advantages of the mentioned methods for an evaluation of their comparability and complementarity. The detailed investigation presented in this paper of the bonding conditions between sleepers and slab, the location of voids or imperfections and of the layer thickness under the sleepers demonstrates the possibility to determine the locations of imperfections and the sleeper bonding conditions with good accuracy by non-destructive testing measurements on site. It was also found that the results of acoustic and electromagnetic methods are complementary. For the covering abstract see ITRD E125214.

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  • Authors:
    • COLLA, C
    • KRAUSE, M
    • SOMMER, H
  • Publication Date: 2000


  • English

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  • Accession Number: 01011747
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • ISBN: 0-947644-43-1
  • Files: ITRD
  • Created Date: Dec 19 2005 3:29PM