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2025 | OriginalPaper | Chapter

Development of Design Charts for Pavement Thickness Design of Unsealed Mine Access Roads Subject to High Volume Heavy Vehicle Traffic

Author : Alex Petty

Published in: Proceedings of the 5th International Conference on Transportation Geotechnics (ICTG) 2024, Volume 6

Publisher: Springer Nature Singapore

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Abstract

Austroads Guide to Pavement Technology Part 6 Unsealed Pavements (AGPT6) provides recommended design processes and a thickness design chart based on empirical methods. The Australian Road Research Board (ARRB) Unsealed Roads Best Practice Guide also provides guidance on pavement thickness design and provides a similar design chart. However, the empirical design charts are only applicable to design Equivalent Standard Axles (DESA) of less than 5 × 105. Often unsealed roads in Western Australia are designed based on a single pavement layer constructed from locally available gravel material. This study aims to provide some design charts and an associated design spreadsheet for pavement thickness design along with some practical guidance to enable concept or budget level designs to be completed for heavily trafficked unsealed pavements. The design methodology incorporates an assessment of the DESA and uses mechanistic design processes, dependent on whether the proposed pavement is a combined basecourse and wearing course or has a separate wearing course, to provide a recommended pavement profile including accounting for gravel loss. The methodology, assumptions and calculation methods are outlined, and the design charts and spreadsheet output examples are provided.

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Appendix
Available only for authorised users
Literature
1.
go back to reference Austroads Ltd (2009) Guide to pavement technology Part 6: Unsealed pavements (AGPT6) Austroads Ltd (2009) Guide to pavement technology Part 6: Unsealed pavements (AGPT6)
2.
go back to reference ARRB unsealed roads best practice guide, edition 2 (2020) ARRB unsealed roads best practice guide, edition 2 (2020)
3.
go back to reference Austroads Ltd (2017) Guide to pavement technology Part 2: Pavement structural design (AGPT2) Austroads Ltd (2017) Guide to pavement technology Part 2: Pavement structural design (AGPT2)
4.
go back to reference Jones TE, Robinson R, Snaith MS (1984) A field study on the deterioration of unpaved roads and the effect of different maintenance strategies. In: Proceedings of the eighth regional conference for Africa on soil mechanics and foundation engineering, Harare, Zimbabwe Jones TE, Robinson R, Snaith MS (1984) A field study on the deterioration of unpaved roads and the effect of different maintenance strategies. In: Proceedings of the eighth regional conference for Africa on soil mechanics and foundation engineering, Harare, Zimbabwe
Metadata
Title
Development of Design Charts for Pavement Thickness Design of Unsealed Mine Access Roads Subject to High Volume Heavy Vehicle Traffic
Author
Alex Petty
Copyright Year
2025
Publisher
Springer Nature Singapore
DOI
https://doi.org/10.1007/978-981-97-8233-8_37