Construction of limestone retaining walls, sewer and stormwater trenching in rock, shallow services and roadworks.
The scope involved the bulk earthworks onsite as well as the construction of four civil stages. The civil stages included construction of limestone retaining walls, sewer ands stormwater trenching in rock, shallow services (power, gas, nbn, water), and roadworks.
The initial challenge was with the bulk earthworks, dealing with the excavation of limestone rock, topsoil works and sand fill onsite in order to achieve a sand fill finish on the top 600mm of the site.
Another challenge was constructing the roundabout under traffic conditions on a fairly busy road adjacent a Primary School.
Tracc managed this by proposing a method of stripping and stockpiling the topsoil, then mining and stockpiling the available clean sand onsite, after which the limestone rock was cut down to 600mm below finished surface and blended and placed with the topsoil in the deep fill areas, and finally placing the mined sand as well as imported sand over the top 600mm of the site.
This achieved the best use of the materials onsite, resulting in savings to the client.
For the construction of the new roundabout, as the road adjacent the site was a main entrance into the area, plus being adjacent a primary school, it was fairly busy during work hours, and extremely busy at peak school hours. Tracc had to plan the construction of the roundabout in stages in order to achieve this construction.
Tracc also planned the work hours to be outside of the peak school hours to reduce the impact of the works on the public and effectively reduce the chance of an incident.
