Pressure measurements and structural performance of hot mixed asphalt railway trackbeds

L. S. Bryson, J. G. Rose

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

4 Scopus citations

Abstract

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.

Original languageEnglish
Title of host publicationBearing Capacity of Roads, Railways and Airfields - Proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields
Pages1219-1229
Number of pages11
DOIs
StatePublished - 2009
Event8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCR2A'09 - Champaign, IL, United States
Duration: Jun 29 2009Jul 2 2009

Publication series

NameBearing Capacity of Roads, Railways and Airfields - Proceedings of the 8th International Conference on the Bearing Capacity of Roads, Railways and Airfields
Volume2

Conference

Conference8th International Conference on the Bearing Capacity of Roads, Railways and Airfields, BCR2A'09
Country/TerritoryUnited States
CityChampaign, IL
Period6/29/097/2/09

ASJC Scopus subject areas

  • Civil and Structural Engineering

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