MODELLING REINFORCED EARTH

Centrifugal modelling offers an opportunity to witness collapses of soil, structured or composite models in circumstances which are not unlike those of full-scale constructions. It is hoped that the new form can be safely analyzed in terms of existing mechanical principles. If so, then these principles will allow the refinement of the new technique, allow its extension more quickly into improved areas, and allow a more rigorous analysis of safety that can be gained by having not yet made an error in practice. The models used were proportioned and oriented so as to reduce those errors in stress which are due to the non-uniformity of the acceleration field to below 10% in the critical region. The capacities of the models were specifically chosen so that a number of tension failures and slippage failures could be observed to disrupt the reinforcement and cause collapse. The dry sand used in all the models was a well-graded coarse to fine glacial sand. The conclusions include among others, that centrifugal models confirm the usefulness of the anchor concept of reinforced earth. An actual earth pressure coefficient measured on loose soil would have safely underpredicted the failure of anchors in tension by a factor of 2.2 to 3.3 and in slippage by a factor of 1.6 to 2.2. Since the friction capacity of an anchor may be made larger without using a greater weight of reinforcement, simply by spreading the same material wider and thinner, it may be economical to employ factors of safety against slippage which are very much larger than two. Future work should be devoted to a further understanding of the stresses in reinforced earth walls, the effects of surface forces and poor foundations, and the feasibility of clay fills.

  • Availability:
  • Corporate Authors:

    Foundation Publications Limited

    7 Ongar Road
    Brentwood CM15 9AU, Essex,   England 
  • Authors:
    • BOLTON, M D
    • Choudhury, S P
    • Pang, PLR
  • Publication Date: 1978-9

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 19-24
  • Serial:
    • GROUND ENGINEERING
    • Volume: 11
    • Issue Number: 6
    • Publisher: EMAP CONSTRUCT LIMITED
    • ISSN: 0017-4653

Subject/Index Terms

Filing Info

  • Accession Number: 00183674
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Dec 12 1978 12:00AM