SELECTION OF LOAD-TRANSFER FUNCTIONS FOR PASSIVE LATERAL LOADING OF PILE GROUPS

A finite element study has been carried out to determine the pile-soil-pile interaction behaviour for closely spaced pile rows and groups under passive lateral loading from soil movement. A horizontal section close to the piles was studied to determine the effects of pile spacing and soil constitutive law on the load-transfer relationships of the piles. The study has revealed links between the soil stress-strain law, the soil deformation mechanism and the pile load-transfer curves. Interaction behaviour was seen to depend on the prevailing deformation mechanism which in turn was governed by the soil constitutive law. Elastic-plastic and power law soil models were applied. Interaction factors suitable for design use to account for increasing lateral pressure on piles during passive lateral loading have been produced for a range of pile spacings and power law soil exponents. Interaction between piles increased both with reduction of pile spacing and with increase of soil exponent - the less soil stiffness degradation with shear strain, the greater the interaction between piles at a given spacing. This suggests that the passive interaction factors calculated using elastic methods are likely to overestimate the effects of pile-soil-pile interaction. (A)

  • Availability:
  • Corporate Authors:

    Elsevier

    The Boulevard, Langford Lane
    Kidlington, Oxford  United Kingdom  OX5 1GB
  • Authors:
    • Bransby, M F
    • SPRINGMAN, S
  • Publication Date: 1999

Language

  • English

Media Info

  • Features: References;
  • Pagination: p. 155-84
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00767230
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Files: ITRD
  • Created Date: Aug 6 1999 12:00AM