Characterization of railroad track substructures using dynamic and static cone penetrometer

W. T. Hong, Seungmo Kang, Jong-Sub Lee, Y. H. Byun, C. Y. Choi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

As deteriorated track substructures cannot produce enough bearing capacity against the load of the train and may lead to serious accidents, an accurate investigation of the track substructures is necessary for proper repair and maintenance. In this study, a dynamic and static cone penetrometer (DSCP) for characterization of track substructures is developed. The DSCP is dynamically penetrated into ballast layer using a 118 N drop hammer and statically pushed into subgrade. The DSCP consists of an outer rod for the dynamic penetration into the ballast layer and inner rod for the static penetration into the subgrade. At the head of the outer rod, an energy-monitoring module is installed to obtain the transferred energy from the drop hammer and two load cells are installed to obtain the cone tip and friction resistances during the static penetration. As a pilot test, track substructures are simulated in a chamber and the DSCP penetration test is conducted and two field tests are conducted in order to investigate the applicability of the DSCP. From the DSCP tests, the energy corrected dynamic cone penetration index for the ballast layer and static penetration resistances (cone tip and friction resistances) are obtained for the subgrade. This study suggests that the DSCP may be a useful tool for the characterization of railroad track substructures.

Original languageEnglish
Title of host publicationProceedings of the 5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016
PublisherAustralian Geomechanics Society
Pages707-710
Number of pages4
Volume1
ISBN (Electronic)9780994626110
Publication statusPublished - 2016
Event5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016 - Gold Coast, Australia
Duration: 2016 Sep 52016 Sep 9

Other

Other5th International Conference on Geotechnical and Geophysical Site Characterisation, ISC 2016
CountryAustralia
CityGold Coast
Period16/9/516/9/9

ASJC Scopus subject areas

  • Geotechnical Engineering and Engineering Geology
  • Geophysics
  • Soil Science

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