Weak subgrade treatment using geogrid reinforcement

In order to demonstrate and quantify the benefit of geogrid reinforcement in improving the bearing capacity of weak subgrades, a full-scale laboratory as well as two recent full-scale instrumented field trial beds were constructed and evaluated by the authors; one in Germany and another one in Australia. In each project the variation in observed in-situ bearing capacity and the modulus parameter was evaluated over a series of variants, including geogrid strength/stiffness, geogrid combination, thickness and quality of cover materials. The results demonstrate a clear improvement in the bearing capacity of the geogrid reinforced section when compared to the unreinforced sections. Similarly, the reinforced trial beds exhibited a considerable reduction in the vertical deformation and lower magnitudes of normal stress being transferred to the underlying weak subgrade were observed. The results also demonstrated a clear influence of strength parameter of the geogrids on the performance of the geogrid reinforcement.


  • English

Media Info

  • Pagination: 967-72
  • Monograph Title: Proceedings of the 13th Australia New Zealand Conference on Geomechanics Perth, Western Australia, 1-3 April, 2019

Subject/Index Terms

Filing Info

  • Accession Number: 01714794
  • Record Type: Publication
  • Source Agency: ARRB Group Limited
  • ISBN: 9780994626103
  • Files: ITRD, ATRI
  • Created Date: Aug 26 2019 11:51AM