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.
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Authors:
- Shahkolahi, A
- Klompmaker, J
- Lacey, D
- Conference:
- Publication Date: 2019-4
Language
- 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
- TRT Terms: Evaluation; Geogrids; Material reinforcement; Soil stabilization; Subgrade (Pavements)
- Geographic Terms: Australia; Germany
- ATRI Terms: Bearing capacity; Evaluation; Geogrid; Reinforcement; Soil stabilization; Subgrade
- Subject Areas: Geotechnology;
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