PREDICTING SUBGRADE SHEAR MODULUS FROM EXISTING GROUND MODELS

Trackbed stiffness is the primary control on rail performance, the sub grade providing the majority of the stiffness for ballasted-track. Using lithological data derived from linear geological maps, examples are presented showing the variability of small strain shear modulus along selected lengths of the 'East Coast Main Line'. Generalised, effective stress-controlled relationships relating small strain shear modulus and density to lithology are used to develop models of sub grade shear modulus from which ground stiffness may be assessed. The models show results for ground, ranging from gravel through sands to weaker clay-rich soils. (A)

• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/issn/09638695
• Corporate Authors:

  Elsevier

  The Boulevard, Langford Lane
  Kidlington, Oxford  United Kingdom  OX5 1GB
• Authors:
  • GUNN, D A
  • JACKSON, P D
  • ENTWISTLE, D C
  • ARMSTRONG, R W
  • CULSHAW, M G
• Publication Date: 2003-4

Language

• English

Media Info

• Features: References;
• Pagination: p. 135-44
• Serial:
  • NDT & E International
  • Volume: 36
  • Issue Number: 3
  • Publisher: Elsevier
  • ISSN: 0963-8695

Subject/Index Terms

• TRT Terms: Clay; Gravel; Performance; Sand; Shear strength; Soils; Stiffness; Subgrade (Pavements)
• ITRD Terms: 4177: Clay; 5910: Durability; 4575: Gravel; 4105: Sand; 5531: Shear; 4156: Soil; 5931: Stiffness; 2950: Subgrade
• Subject Areas: Geotechnology; Highways;

Filing Info

• Accession Number: 00962596
• Record Type: Publication
• Source Agency: Transport Research Laboratory
• Files: ITRD
• Created Date: Sep 3 2003 12:00AM