The construction and performance of a new type of retaining structure is described. The wall, at the head of a steep canyon, was built by anchoring a thin metal face to the backfill area with multiple metal tiestraps anchored to a continuous deadman. The forces in the tiestraps, the distribution of these forces, the distribution of stresses in the soil and backfill, and the deformation of the wall and within the backfill were measured with appropriate strain and fluid settlement gauges and pressure cells. Subject to the limitations imposed by the facts that the instrumentation and the results produced from the pressure cell observations showed considerable variability, the following conclusions are drawn: (a) conventional earth-pressure analysis gives reasonable forces for tiestrap wall design, but consideration in future designs should be given to the effects of sloping surcharges; (b) stresses in the backfill near the wall face are less than those indicated by conventional earth-pressure analysis; (c) a tieback wall deforms in the active sense in spite of the presence of the tiestraps. The potential failure surface within the backfill can be predicted with reasonable accuracy using Coulomb earth-pressure analysis, but the actual surface may define a smaller active zone; (d) the outward wall movements were not unreasonably large, but were of sufficient magnitude to reduce the total force necessary to stabilize the backfill at the active value; (e) the vertical movements in the backfill exceed those accounted for by lateral wall movement and were weather-related; and (f) the wall was still moving at the end of the rainy season, but at a rate significantly smaller than before. Further movements appear to be likely, but tolerable. /Author/

Media Info

  • Media Type: Print
  • Features: Figures; Photos; References;
  • Pagination: pp 56-61
  • Monograph Title: Soil mechanics: rutting in asphalt pavements, embankments on varved clays and foundations
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00162999
  • Record Type: Publication
  • ISBN: 0309025958
  • Files: TRIS, TRB
  • Created Date: Oct 13 1977 12:00AM