STUDY ON DEFORMATION CHARACTERISTICS OF EXISTING BALLASTLESS TRACK APPLYING ROADBED IMPROVEMENT

In order to reduce the cost of track maintenance, ballastress track for existing was developed, in which the ballast voids were filled with cement grout. However, some constructed ballastress tracks require repair within a few years after operation on the soft roadbed. Therefore, in this study, the authors developed a construction method that can improve the roadbed simultaneously with the construction of the ballastress track, when the ballastress track installed on a soft roadbed. The authors evaluated the deformation characteristics of the ballastress track with improved roadbed by full scale loading tests. It was also found that the amount of plastic settlement of ballastress track could be evaluated by repeated triaxial compression test of subgrade materials. Furthermore, the authors confirmed the effect of reducing the stress generated in the existing ballastless track by applying the roadbed improvement.

Language

  • English
  • Japanese

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Filing Info

  • Accession Number: 01767194
  • Record Type: Publication
  • Source Agency: Japan Science and Technology Agency (JST)
  • Files: TRIS, JSTAGE
  • Created Date: Feb 1 2021 3:57PM