Use of Geosynthetics for Reinforcing/Stabilizing Unpaved Roads under Full-Scale Truck Axle Loads

The significant impact of the truck traffic associated with the shale energy developments on local roads, including many unpaved gravel roads, has been a pressing issue while the regional economy benefits from the recent shale gas boom. In many cases, roads had to be reconstructed over a soft soil subgrade treated and stabilized by cement or lime. As an alternative, geosynthetics offer a potentially more cost-effective solution for reinforcing/stabilizing roads on soft soil subgrade. This paper presents a study using a full-scale accelerated traffic load testing to evaluate two recently-emerged geosynthetic products, a triaxial geogrid and a high-strength woven geotextile in unpaved roads built over soft soil subgrade. A total of six full-scale test sections were constructed - among which two sections were reinforced by one and two layers of triaxial geogrids, respectively - while high-strength geotextiles were used to reinforce two of the other sections with different aggregate layer thicknesses. The rest of the two sections were left as control sections, of which one section was constructed over a 30-cm-thick sand embankment. The test sections were subjected to a full-scale moving wheel load applied by the Accelerated Loading Facility (ALF). A variety of instrumentations were used to measure the load-associated and the environment-associated responses and performance of the unpaved test sections. Results of the full-scale testing on the unpaved test sections demonstrate the benefits of geosynthetics in reducing the permanent deformation/rutting.

Language

  • English

Media Info

  • Media Type: Digital/other
  • Features: Figures; Photos; References; Tables;
  • Pagination: pp 591-602
  • Monograph Title: Shale Energy Engineering 2014: Technical Challenges, Environmental Issues, and Public Policy

Subject/Index Terms

Filing Info

  • Accession Number: 01535276
  • Record Type: Publication
  • ISBN: 9780784413654
  • Files: TRIS, ASCE
  • Created Date: Jul 14 2014 3:01PM