Monitoring of Rutting and Roughness of the Elliott Highway

The effects of lifting load restrictions during spring-thaw on damage to Alaskan roads is of major concern to the Alaska Department of Transportation and Public Facilities (AKDOT&PF) as it impacts road maintenance costs. Since road damage is cumulative, monitoring of road conditions where seasonal load restrictions are not imposed could provide useful information to AKDOT&PF, particularly in relation to establishing a seasonal load restriction policy. As part of the Elliott Highway MP7 North Rehabilitation (Project F-065-1 (12) 63406) which started in June 1997, a number of experimental sections have been incorporated as part of the pavement structure. These sections include: separation geotextile, heavy duty geosynthetic reinforcement, open-graded permeable asphalt-treated base, stabilized subgrade using dynamic compaction, stabilized recycled asphalt treated dense-graded base, concrete slab support spanning over unstable foundation, high float asphalt surface (section constructed summer 1995), and stabilized asphalt-treated base. AKDOT&PF has been monitoring the Elliott Highway since 1992 as part of the Experimental Features Program. In this case the performance of three pavement sections were periodically reported (McHattie 1996): (1) an insulated embankment reinforced with multiple layers of heavy duty geotextile (also known as "pillow-wrap" embankment); (2) a pavement section with an open-graded asphalt-treated permeable base; and (3) a section with a reinforced concrete slab beneath the roadway surface. In addition, a study was conducted following the lifting of load restrictions on the Elliott in 1994 and preliminary results on road roughness and rutting were reported by Raad et al. (1995). The objectives of this study were: (1) Determine the locations of the pavement sections with different features along the Elliott. (2) Analyze truck traffic data in terms of 18 kip Equivalent Single Axle Loads (EAL) using data from the scalehouse at Fox. (3) Analyze temperature data to assess critical period for thaw initiation and also to determine the rate of thaw propagation in the pavement. (4) Analyze roughness and rutting data obtained periodically during spring and summer of 1996 using standard rut bar and AKDOT&PF profilometer. (5) Compare roughness and rutting data at different periods and discuss any observed effects of loading and ground thawing.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Edition: Final Report
  • Features: Appendices; Figures; References; Tables;
  • Pagination: 61p

Subject/Index Terms

Filing Info

  • Accession Number: 01538250
  • Record Type: Publication
  • Files: TRIS, ATRI, USDOT, STATEDOT
  • Created Date: Sep 8 2014 9:34AM