Value Engineering The SunBelt Rentals Equipment Yard Rehabilitation

The equipment yard of the Sunbelt Rentals Equipment Agency in Bangor, ME needed a complete rehabilitation. The aggregate surfaced parking areas and drive lanes had been completely contaminated by the saturated clay subgrade soils. The owners had no place for the high groundwater to go, making the site a muddy mess during the spring thaw as the heavy construction equipment traveled across the parking areas. The owner’s original plan was to remove and replace 12 inches of the clay mixed aggregate with a dense graded aggregate (DGA). After performing test pit excavations and dynamic cone penetrometer tests, the subgrade was found to have a California Bearing Ratio (CBR) of approximately 1.2%. This CBR value was extremely weak and would actually require approximately 32 inches of DGA to stabilize it. A value engineered alternative utilizing 2 layers of high strength geotextiles, an 8-inch layer of clean (open graded) stone and a 6-inch layer of DGA was determined to be the most economical solution. The use of the high strength geotextiles helped separate the subgrade and aggregate during construction and added reinforcing strength that will be maintained for the life of the section.


  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References;
  • Pagination: pp 524-534
  • Monograph Title: Proceedings of the 67th Highway Geology Symposium (HGS 2016)

Subject/Index Terms

Filing Info

  • Accession Number: 01630371
  • Record Type: Publication
  • Files: TRIS
  • Created Date: Mar 27 2017 9:35AM