COMPRESSIBLE CONDUITS UNDER DEEP FILL LOADS - A MODEL STUDY

Interest in the problem of circular flexible conduits buried under very deep fills has prompted a study of the effects of in-plane compressibility in the conduit wall. A model of a highly flexible conduit consisting of a 17 mm diameter rubber tube was located on the axis of an otherwise conventional 102 mm diameter triaxial test specimen. While the tube was supported against the dense sand soil by a nominal water pressure the cell pressure was progressively increased to the capacity of the apparatus. The decrease in diameter of the tube was determined from volume change measurements. No indication of catastrophic failure was observed but, instead, a bilinear stress-deflection response for which the rate of deflection at the higher stress levels was considerably less than at lower levels. The maximum total diameter change was about 3 per cent. An elastic-plastic dilating-soil model is proposed to explain the response and it is suggested that the lower strain rate is associated with development of a predominantly critical state condition. (Author/TRRL)

  • Availability:
  • Supplemental Notes:
    • Papers presented during the Geomechanics-Interaction, Fourth Australia-New Zealand Conference on Geomechanics Perth, Western Australia, 14-18 May 1984, Volumes I and II.
  • Corporate Authors:

    Institution of Engineers

    11 National Circuit
    Barton, A.C.T.,   Australia 
  • Authors:
    • Kay, J N
    • Kokkinakis, T
    • Tallidira, M C
  • Publication Date: 1984-3

Media Info

  • Features: Figures; References; Tables;
  • Pagination: p. 34-38
  • Monograph Title: GEOMECHANICS - INTERACTION. FOURTH AUSTRALIA - NEW ZEALAND CONFERENCE ON GEOMECHANICS, PERTH, WESTERN AUSTRALIA, 14-18 MAY 1984. PREPRINTS OF PAPERS. VOLUMES I AND II
  • Serial:
    • Issue Number: 84/2

Subject/Index Terms

Filing Info

  • Accession Number: 00392022
  • Record Type: Publication
  • Source Agency: ARRB
  • ISBN: 0-85825-208-2
  • Files: ITRD, TRIS, ATRI
  • Created Date: Mar 29 1985 12:00AM