A COMPUTER MODEL FOR THE ANALYSIS OF GROUND MOVEMENTS IN LONDON CLAY

A computer model for the stress-strain behaviour of London clay has been developed for use in a non-linear finite element program. The behaviour of London clay is divided into three ranges of strain: elastic, intermediate and plastic. In the elastic range strains are very small and the material is very stiff. The intermediate range represents the larger strain behaviour normally observed in laboratory tests; it is not truly elastic, but in many respects exhibits anisotropic elastic behaviour. As yield is approached, plastic behaviour can accompany the intermediate phase and is governed by a flow rule and a state boundary curve. In all phases the stiffnesses of the model increase with mean normal effective stress. It is shown that the model can be used to compute the results of both laboratory and in situ tests. The movements around two excavations in London clay, including the new palace yard underground car park, have also been computed retrospectively with considerable success. /Author/TRRL/

Media Info

  • Features: Figures; References;
  • Pagination: p. 149-175
  • Serial:
    • GEOTECHNIQUE
    • Volume: 29
    • Issue Number: 2
    • Publisher: Thomas Telford Limited
    • ISSN: 0016-8505

Subject/Index Terms

Filing Info

  • Accession Number: 00301867
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD, TRIS
  • Created Date: Dec 19 1979 12:00AM