Geotechnical studies for the Adelaide Rail Revitalisation Project: a case study comparing in-situ and laboratory testing of ballast and subgrade materials

The South Australian Government has committed $2 billion over the next 10 years to the Rail Revitalisation Project for electrification of its Adelaide passenger rail network. This includes an extensive rejuvenation program comprising ballast, rail and sleeper replacement. The Department for Transport, Energy and Infrastructure (DTEI) commissioned Parsons Brinckerhoff (PB) to undertake geotechnical and environmental investigations over 104 km of rail network to provide information on track and drainage conditions and contamination levels of ballast and subgrade materials for the track reconstruction works. The investigation program covered a wide range of Adelaide soils and comprised over 100 boreholes and 700 test pits excavated through the ballast into the subgrade. Laboratory tests were undertaken on ballast and subgrade samples and included soaked and unsoaked California Bearing Ratio (CBR), total suction, and soil and pavement material classification tests. In-situ testing included pocket penetrometers, Dynamic Cone Penetration (DCP), Clegg Hammer, Light Weight Falling Weight Deflectometer (LWFWD) and Humboldt GeoGauge stiffness test methods. The paper presents details of the investigative methods undertaken to collect and present the data, compares laboratory tests with in-situ test results, describes the main causes for track stability problems and recommends potential design and construction solutions.

Media Info

  • Pagination: 11p.
  • Monograph Title: Rejuvenation and renaissance: CORE 2010: conference on railway engineering, 12-15 September 2010, Wellington, New Zealand

Subject/Index Terms

Filing Info

  • Accession Number: 01517072
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Mar 4 2014 8:06PM