COMPACTION OF HYDRAULICALLY PLACED FILLS

In this discussion, information is presented concerning a project in which hydraulic fills were placed in a flood plain to raise a site for material storage or one-story manufacturing or warehousing. Details of the construction are outlined. It is indicated here that well-controlled hydraulic fills, without separate mechanical compaction can have median relative densities above 70 percent with only a very small percentage of densities below 50 percent. Limitation on fines in the borrow material is redundant for this type fill even where dredging includes a clayey silt overburden. The specific nature of the numerical reporting of relative density when compared with the determination of "percent compaction" shows that it is much more sensitive to minor variations in field dry density. The value is stressed of visual observation by experienced, qualified field personnel. The results are discussed of 125 field tests plus an equal number of maximum and minimum densities and gradational characteristics of the samples removed from the field tests. The determination of relative densities for fills of cohesionless material has been by use of the Gibbs and Holtz criteria based upon Standard Penetration numbers, either with or without modification. It is urged that where fill quality can be tested as the fill is being placed, the more reliable determinations or relative densities by physical testing should be used. The additional cost for the technical services necessary to determine the characteristics of the fill as it is being placed as compared to attempting to establish the quality by correlation after the fill has been completed is small.

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  • Supplemental Notes:
    • Paper presented November, 1973, by Willard J. Turnbull and Charles I. Mansur, Proceeding Paper 10170.
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  USA  10017-2398
  • Discussers:
    • Reitz, H M
    • Hunter Jr, A H
  • Publication Date: 1974-10

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Filing Info

  • Accession Number: 00265153
  • Record Type: Publication
  • Report/Paper Numbers: Proc. Paper 10838 Proceeding
  • Files: TRIS
  • Created Date: Feb 11 1975 12:00AM