High-speed passenger rail tie-ballast interaction.

Details

• Corporate Creators:
  United States. Federal Railroad Administration
• Subject/TRT Terms:
  • Railroad ties
  • Railroad tracks
  • Ballast (Railroads)
  • Bearing capacity
  • Railroad bridges
  • High speed rail
• Publication/ Report Number:
  RR 15-13
• Resource Type:
  Brief
• Geographical Coverage:
  United States
• Corporate Publisher:
  United States. Federal Railroad Administration
• Abstract:
  This Research Results Report presents ; evidence of poor tie support and increased ; applied loads that were used to determine the ; “root cause” of transient and permanent vertical ; displacements at two Amtrak bridge transitions. ; These results are from a Federal Railroad ; Administration (FRA) study on differential ; movement at high-speed track transitions. Data ; from instrumented high-speed passenger bridge ; transitions along Amtrak’s Northeast Corridor ; (NEC) near Chester, Pennsylvania show a ; relation between measured permanent vertical ; displacements of ballast and a gap between the ; bottom of the tie and top of the ballast. The ; existence of a gap at locations experiencing ; large permanent ballast displacements suggests ; that poor tie support amplifies the applied loads ; to the ballast which accelerates ballast and tie ; degradation. Therefore, the “root cause” of ; permanent vertical displacements at the ; instrumented high-speed passenger transition ; zone locations is concluded to be an increase of ; applied loads to the ballast and adjacent ties ; resulting from poor tie support at the ; instrumented tie.
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• Format:
  PDF
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28973/dot_28973_DS1.pdf
• File Type:
  [PDF - 482.16 KB]
• Collection(s):
  Federal Railroad Administration ; US Transportation Collection
• Main Document Checksum:
  urn:sha256:c5bf5fa84e00fb62bb60fac2f9e9ba4f82b379b06fe6e529fee3d5eda8b11f42