FIFTEEN YEARS AFTER

In 1983, designers were faced with constructing a 2,000-ft by 75-ft bituminous-paved taxiway at the Duluth International Airport, Duluth, Minnesota, over swamp-deposited peat soils. Three schemes were proposed to deal with the unstable peat and create a stabilized embankment on which the taxiway pavement could be placed: complete excavation and replacement, displacement of peat with final surcharge, and placement of geotextile and stage-loading of peat with final surcharge. Project owners chose geotextile option as the most cost-effective and environmentally sound construction method. Six feet of excess fill or surcharge was left in place for approximately 2 years, from 1983 to 1985. After surcharge removal, a 16-in. bituminous pavement on a 4-in. crushed aggregate base was placed for the 2,000 ft of taxiway over the swamp and another 4,000 ft. The taxiway pavement has not required any repair since the day it was placed. In April 1999, engineers examined the pavement and re-shot the center line of the taxiway pavement for elevation control. The center line elevation was within 2 in. of the 1985 pavement elevation. The greatest difference measured was 0.11 ft over 181 ft, which represents an acceptable slope of approximately 0.06%.

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  • Corporate Authors:

    Industrial Fabrics Association International

    345 Cedar Building, Suite 450
    St Paul, MN  United States  55101-1088
  • Authors:
    • Gale, S M
    • Christopher, B R
  • Publication Date: 1999-8

Language

  • English

Media Info

  • Features: Figures; Photos; Tables;
  • Pagination: p. 30-36
  • Serial:

Subject/Index Terms

Filing Info

  • Accession Number: 00798414
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Sep 14 2000 12:00AM