Sub-grade support: a review of short-term and long-term performance requirements
Paper
Paper/Presentation Title | Sub-grade support: a review of short-term and long-term performance requirements |
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Presentation Type | Paper |
Authors | |
Author | Nataatmadja, Andreas |
Editors | Hossain, Zakaria and Shiau, Jim |
Journal or Proceedings Title | Proceedings of 4th International Conference on Geotechnique, Construction Materials and Environment (GEOMATE 2014) |
Journal Citation | 4 (1), pp. 179-184 |
Number of Pages | 6 |
Year | 2014 |
Place of Publication | Mie, Japan |
ISBN | 9784990595838 |
Web Address (URL) of Paper | http://www.gi-j.com |
Conference/Event | 4th International Conference on Geotechnique, Construction Materials and Environment (GEOMATE 2014) |
Event Details | 4th International Conference on Geotechnique, Construction Materials and Environment (GEOMATE 2014) Parent International Conference on Geotechnique, Construction Materials and Environment Event Date 19 to end of 21 Nov 2014 Event Location Brisbane, Australia |
Abstract | Subgrade performance is a function of a soil's strength and its behaviour under traffic loading. The subgrade should be stable to prevent excessive rutting and shoving during construction, provide good support for placement and compaction of pavement layers, keep pavement rebound deflections to acceptable limits, restrict the development of excessive rutting during the service life of the pavement and minimise effect of changes in moisture level. In the case of weak subgrades, a capping layer of some thickness may be placed on top of the subgrade to facilitate field construction. This paper demonstrates that a semi-infinite effective subgrade stiffness can in fact be calculated for a combination of a capping layer and a semi-infinite subgrade. Furthermore, this paper discusses the importance of thickness and quality of capping layer, for both short- and long-term loading conditions. The recommended capping thicknesses have been benchmarked against the UK and US requirements. |
Keywords | pavement; subgrade; capping layer; modulus; elastic analysis |
ANZSRC Field of Research 2020 | 400502. Civil geotechnical engineering |
400512. Transport engineering | |
410605. Soil physics | |
Public Notes | Copyright 2014 by The GEOMATE International Society. In principle, no part of this publication may be reproduced without prior permission in writing from the publisher. |
Byline Affiliations | School of Civil Engineering and Surveying |
Institution of Origin | University of Southern Queensland |
https://research.usq.edu.au/item/q2xq7/sub-grade-support-a-review-of-short-term-and-long-term-performance-requirements
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