Principles of side resistance development in rock socketed piles

An understanding of the principles associated with the side resistance of rock socketed piles has been developed by considering the pile rock interface as a confined joint. The approach indicates that relative displacement between the pile and rock will occur by either sliding of one surface on the other or by shearing through the concrete or rock asperities. In either case, a dilation has been shown to occur across the interface which has given rise to significant stresses normal to the pile. The side resistance has been found to be a function of the normal stresses and the strength properties of the concrete and rock. The validity of the concepts developed has been investigated by field testing several piles 1 to 1.2 M diameter and 2 to 2.5 M long in highly to moderately weathered mudstone. The stresses acting normal to each pile have been calculated from measurements of strain in the pile segments, and the socket dilations have been measured by displacement transducers installed in the rock mass. These measurements showed agreement with the postulated principles and have allowed investigation and design procedures to be rationally developed. Further, the developed principles simply explain the work strengthening or work weakening observed during field testing of side resistance piles (a).

Language

  • English

Media Info

  • Pagination: 1.87-94
  • Monograph Title: Third Australia - New Zealand conference on geomechanics, Wellington, may 12-16, 1980. volume 1
  • Serial:
    • Volume: 6
    • Issue Number: 1(G),PART1

Subject/Index Terms

Filing Info

  • Accession Number: 01438136
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ATRI
  • Created Date: Aug 24 2012 9:23PM