High-speed passenger rail tie-ballast interaction.

Details

• Corporate Creators:
  United States. Federal Railroad Administration
• Subject/TRT Terms:
  Ballast (Railroads) Bearing Capacity High Speed Rail Railroad Bridges Railroad Ties Railroad Tracks
• 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.
  
  
• Format:
  PDF
• Collection(s):
  US Transportation Collection Federal Railroad Administration
• Main Document Checksum:
  urn:sha256:c5bf5fa84e00fb62bb60fac2f9e9ba4f82b379b06fe6e529fee3d5eda8b11f42
• Download URL:
  https://rosap.ntl.bts.gov/view/dot/28973/dot_28973_DS1.pdf
• File Type:
  [PDF - 482.16 KB ]