Toyota Manufacturing Australia
Company Fleet Earthworks and Pavements

Berne Fleming Civil was awarded a $2.2M contract to build pavements drainage and service trenches for Toyota’s new Fleet Maintenance facility. As a virtual Greenfield project, and in preparation for the pavement construction, BFC bought in heavy machinery for the removal of vegetation and topsoil and the placement of structural fill. Toyota’s specification required BFC to provide documentation and compliance certificates for the receipt, grading and compaction of the clean fill, including regular testing by an independent NATA registered laboratory. To achieve this we sub-contracted geotechnical engineers, Cardno Bowler, to ensure that every load of clay met these highest NATA standards for both the environmental and structural qualities. All fill imported to site was thoroughly inspected, both at the source and during delivery, by Cardno Bowlers site representative to ensure it met the suitable fill requirements outlined in AS3798-1996.As well as a full time site geotechnical engineer, compaction control tests were carried out at regular intervals throughout the placement of fill in accordance with the minimum test frequency recommendations included in AS3798-1996 ‘Guidelines on Earthworks for commercial and residential developments’. A total of 38 field density tests were carried out throughout the earthworks, consisting of an approximate combined total of 15,000m³ of compacted fill material (one test per 394m³). The average density ratio was 101.46% with a standard deviation ratio of 1.876. These exacting standards were reproduced as the project proceeded through the construction of drainage and data trenching and the various crushed rock pavement compositions and the final asphalt layers.