The results are presented of 120 dynamic triaxial tests performed on samples of medium dense hydraulic fill obtained from several old dams. Details of sampling and testing are outlined, and the development of axial strain as a function of a number of loading cycles is illustrated in a figure. Most of the specimens exhibited gradual progressive deformation; a few liquefied. The test results indicate that these hydraulic fill materials exhibit a resistance to deformation under cyclic loading which is relatively high in comparison to other medium dense cohesionless soils. Sudden or complete loss of strength due to liquefaction occurred in relatively few of the specimens that failed. Dynamic strength is not proportional to confining pressures less than 2,000 psf. The conventional assumption of proportionality would lead to substantial underestimates of dynamic strength in the upper few tens of feet of saturated deposits of these materials.

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Filing Info

  • Accession Number: 00141307
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #12169 Proceeding
  • Files: TRIS
  • Created Date: Oct 26 1976 12:00AM