Sub-grade support: a review of short-term and long-term performance requirements

Paper


Nataatmadja, Andreas. 2014. "Sub-grade support: a review of short-term and long-term performance requirements." Hossain, Zakaria and Shiau, Jim (ed.) 4th International Conference on Geotechnique, Construction Materials and Environment (GEOMATE 2014). Brisbane, Australia 19 - 21 Nov 2014 Mie, Japan.
Paper/Presentation Title

Sub-grade support: a review of short-term and long-term performance requirements

Presentation TypePaper
Authors
AuthorNataatmadja, Andreas
EditorsHossain, Zakaria and Shiau, Jim
Journal or Proceedings TitleProceedings of 4th International Conference on Geotechnique, Construction Materials and Environment (GEOMATE 2014)
Journal Citation4 (1), pp. 179-184
Number of Pages6
Year2014
Place of PublicationMie, Japan
ISBN9784990595838
Web Address (URL) of Paperhttp://www.gi-j.com
Conference/Event4th 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.

Keywordspavement; subgrade; capping layer; modulus; elastic analysis
ANZSRC Field of Research 2020400502. 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 AffiliationsSchool of Civil Engineering and Surveying
Institution of OriginUniversity of Southern Queensland
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