Pacific highway glenugie: case study of the use of heavy duty granular pavement in northern NSW

Beaumont, Matthew (2016) Pacific highway glenugie: case study of the use of heavy duty granular pavement in northern NSW. [USQ Project]

Text (Main Project)
Beaumont M Jo Devine.pdf

Download (3MB) | Preview


In September 2011, the Glenugie upgrade of the Pacific Highway was completed. This upgraded section was effectively a trial to gain a better understanding of whether or not heavy duty granular pavement design would be a feasible option in Northern NSW. A considerable amount of time and effort was expended in the development of the standard and suitable gravels to meet this standard. In 2014, failures were first observed in the upgraded section of pavement at Glenugie in the form of flushing, rutting and shoving. Over the following year, these failures continued to deteriorate with pot holes forming in a number of areas.

The objective of the project is to evaluate the pavement performance thus far and determine the mechanism which is the cause of any failure in the pavement. Examination of the root cause of the failure mechanism, with the aim of improving performance and maintenance of heavy duty granular pavements in Northern NSW in future.

The project proposes to achieve this objective through carrying the following:
. Research the background of Glenugie Pacific Highway upgrade and the relevant standards and specification regarding heavy duty granular pavement in NSW and surrounding states and territories.

. Assessment of the pavement’s performance to date and the extent of the pavement failure in the segment of road of interest. This has been conducted using two sets of data: defect mapping from a visual inspection of the road and a data set from the RMS RAMS database including cracking, roughness and rutting data.

. Assessment of the cause of the current failures and there root cause in areas of the Glenugie pavement. This assessment will be based on a range of soil testing which has been carried out by RMS in areas of the pavement which have shown a high rate of pavement failures and will utilise TSD data from the RMS RAMS data base. This test data will be used to compare with a range scientific literature, specifications and construction data to develop substantial theory supported by evidence as to the mechanism or mechanisms which is cause the failures in these areas of pavement.

Overall the study shows that pavement at Glenugie is performing below expectations. With the primary cause of the rutting and failures being the breakdown of material and associated reduction in shear strength and modulus of the material. The evidence presented report also identifies that the secondary cause of failures is likely to be due to moisture content of the pavement material. This is supported be the defection data which indicates that earthworks upper zone or subgrade material are unlikely to be the cause of the failures.

Statistics for USQ ePrint 31371
Statistics for this ePrint Item
Item Type: USQ Project
Item Status: Live Archive
Additional Information: Bachelor of Engineering (Honours) Major Civil Engineering project
Faculty/School / Institute/Centre: Historic - Faculty of Health, Engineering and Sciences - School of Civil Engineering and Surveying (1 Jul 2013 - 31 Dec 2021)
Supervisors: Devine, Jo
Date Deposited: 19 Jul 2017 01:21
Last Modified: 19 Jul 2017 05:26
Uncontrolled Keywords: pavement performance; heavy duty granular pavement; performance and maintenance
Fields of Research (2008): 09 Engineering > 0905 Civil Engineering > 090503 Construction Materials
Fields of Research (2020): 40 ENGINEERING > 4005 Civil engineering > 400505 Construction materials

Actions (login required)

View Item Archive Repository Staff Only