FIELD TEST OF ELECTROOSMOTIC STRENGTHENING OF SOFT SENSITIVE CLAY

This paper describes a field test undertaken to assess the effectiveness of electroosmosis in strengthening the soft sensitive (Leda) clay at the Gloucester test fill site. Specially designed copper electrodes were installed to prevent gas accumulation around the electrode and to allow pore water in the soil to flow out from the cathode without pumping. The variation of settlement, shear strength, and voltage distribution during treatment was measured, and tube samples were recovered before and after treatment for laboratory tests. The results of field vane tests at different locations within the treated area and at different times indicate that the undrained shear strength increased uniformly by approximately 50 percent for a period of 32 days throughout the depth of the electrodes. Concurrently, an average surface settlement of 50 mm was achieved. The total power consumption was less than 1 percent of the total project cost, indicating that the design of the treatment system was efficient. It is evident, therefore, that substantial increase in strength as well as general improvement in soil properties may be achieved by this improved version of electroosmosis. The elimination of pumping improved the economy of the process considerably. It is hoped that the process may receive wider application as a result of these improvements.

  • Corporate Authors:

    National Research Council of Canada

    Research Journals
    Ottawa, Ontario K1A 0R6,   Canada 
  • Authors:
    • Lo, K Y
    • HO, K S
    • Inculet II
  • Publication Date: 1991-2

Media Info

  • Features: Figures;
  • Pagination: p. 74-83
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00608044
  • Record Type: Publication
  • Files: TRIS
  • Created Date: May 31 1991 12:00AM