AN ELASTODYNAMIC INTERPRETATION OF IMPACT TEST APPARATUS FOR SOILS

A simple analytical elastodynamic model for interpreting impact tests on soils and pavements is presented. The hand-operated Odin hammer and Clegg meter apparatus and the trailer-drawn falling weight deflectometer apparatus are analysed using this model to assess their usefulness for determining dynamic in situ shear moduli. The key results of the theoretical model, based on a mass spring dashpot analogue, are expressed in terms of simple equations; this facilitates their use in practice. The theoretical model is validated by comparison of its predictions with those obtained from the rigorous elastodynamic theory of the impact dynamics of discs on an elastic half-space. The theoretical predictions agree reasonably well with observed behaviour in laboratory and field tests. The model indicates the importance of inertial effects and identifies the factors which induce non-linear soil response. Suggestions for further refinement of the model are made. (A)

  • Availability:
  • Corporate Authors:

    Thomas Telford Limited

    London,   United Kingdom 
  • Authors:
    • Davies, T G
    • KARIM, U F
  • Publication Date: 1995-12

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 691-700
  • Serial:
    • GEOTECHNIQUE
    • Volume: 45
    • Issue Number: 4
    • Publisher: Thomas Telford Limited
    • ISSN: 0016-8505

Subject/Index Terms

Filing Info

  • Accession Number: 00720831
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: May 24 1996 12:00AM