PLANNING AND PERFORMING COMPACTION GROUTING

In this discussion, the observation is made that the advocating of the techniques (described in the paper) as a remedial solution to foundation settlement is only partially true. In the case of a settled residential slab where leveling is the objective, the compaction grouting technique would stablize the bearing soil but unless other steps are employed, adequate leveling would not be achieved. Due to accepted slab design, it is desirable for the slab to be supported over basically 100 percent of the foundation area. Deep grouting would not provide this support. Supplemental "shallow" grouting would be required. The settlement problems induced by dessication of volatile soils (high clay) is considered. The problem lends itself most susceptible to "normal" pressure grouting (mud-jacking). Since the majority of all foundation problems are related to moisture variations in volatile soil, the applicability of the author's methods is limited. Attention is drawn to the use by the oil industry of a technique similar to the author's 'compaction grouting'. Some of the data published within the industry, verify that injection pressures may exceed overburden loads but the conditions would not be anticipated to any appreciable extent in normal shallow soils, indicating some doubt for the author's quoted injection pressures of 50 psi to 600 psi at depths of from 5 ft to 20 ft. Likely, this suggested pressure reflects friction lossed regardless of the rationale presented by the authors. The technique of compaction grouting has, however, been verified for applications such as consolidation of fill, water shut-off in earthen dams, improving bearing strength of supporting soils for deep pilings, and setting earth anchors.

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  • Supplemental Notes:
    • Discussion of Proc. Paper 10606 by James Warner and Douglas R. Brown originally published June 1974.
  • Corporate Authors:

    American Society of Civil Engineers

    345 East 47th Street
    New York, NY  USA  10017-2398
  • Discussers:
    • Brown, R W
  • Publication Date: 1975-2

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Filing Info

  • Accession Number: 00083661
  • Record Type: Publication
  • Report/Paper Numbers: ASCE #11087
  • Files: TRIS
  • Created Date: Apr 22 1975 12:00AM