Pressure Measurements and Structural Performance of Hot Mixed Asphalt Railway Trackbeds

In order to assess pressure distributions within the track and support structure, earth pressure cells have been installed in selected hot mix asphalt (HMA) trackbeds on a CSX Transportation heavy tonnage revenue freight line and at the TTCI heavy tonnage test track in Pueblo. The measured values of pressure distribution within each layer were used to establish a pressure index. This pressure index is the ratio of pressure at the interface of a layer, to the predicted bearing capacity of the layer. A pressure index value of one implies failure of the layer. The pressure index and other measures of structural performance such as track modulus and subgrade stiffness were assessed. From these assessments, relationships were established whereby the pressure distribution and deflection characteristics of the trackbed were quantified in terms of material type and layer thickness. Thus, allowing for a rational performance assessment of the overall trackbed system.

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/9780415871990
• Supplemental Notes:
  • Abstract reprinted with permission of Taylor & Francis.
• Corporate Authors:

  CRC Press/Balkema

  P.O. Box 447
  2300 AK Leiden,   Netherlands 
• Authors:
  • Bryson, Lindsey Sebastian
  • Rose, J G
• Conference:
  • Bearing Capacity of Roads, Railways and Airfields. 8th International Conference (BCR2A'09)
  • Location: Champaign IL, United States
  • Date: 2009-6-29 to 2009-7-2
• Publication Date: 2009

Language

• English

Media Info

• Media Type: Web
• Edition: e-book ISBN 9780203865286
• Features: Figures; References;
• Pagination: pp 1219-1229
• Monograph Title: Bearing Capacity of Roads, Railways and Airfields. Proceedings of the 8th International BCR2A'09 Conference

Subject/Index Terms

• TRT Terms: Asphalt ballast; Ballast (Railroads); Bearing capacity; Deflection; Field tests; Freight trains; Hot mix asphalt; Railroad tracks; Stiffness; Subgrade (Pavements); Tonnage
• Subject Areas: Freight Transportation; Pavements; Railroads; I22: Design of Pavements, Railways and Guideways; I31: Bituminous Binders and Materials;

Filing Info

• Accession Number: 01350648
• Record Type: Publication
• ISBN: 9780415871990
• Files: TRIS
• Created Date: Aug 29 2011 2:56PM