NSW Roads & Traffic Authority Emergency Storm Water Repair Hume Highway
Client: NSW Roads & Traffic Authority (RTA)
Project: Repair of storm water asset within median strip of the Hume Highway, Gilead
The Roads & Traffic Authority is a state government body that builds and maintains roads and other associated assets such as stormwater. Based on our track record, the RTA originally contacted Downer PipeTech to discuss the repair of one of its stormwater assets through pipebursting or directional drilling. As the pipes had dropped and the chamber had collapsed this was soon found to be impossible. Despite the fact that the fi nal solution was purely an open cut one, the RTA still enlisted Downer PipeTech to undertake the management of the design and construction of the project.
Downer PipeTech provides a broad range of world’s best practice technologies for the installation and renovation of pipelines and structures. Our diverse range of trenchless technologies are suited to pressure and non pressure applications, including potable water pipelines, sewer mains and storm water infrastructure Besides the works for the RTA, Downer PipeTech also provides dig and repair services to Sydney Water in their sewer network.
Plans of the existing system showed the stormwater pipes at a depth of approximately 5m. At this depth it was possible to install shoring boxes and repair the system fairly readily. Once Downer PipeTech was on site, however, it became apparent that the depth to the top of the pipes was approximately 9m on the eastern side and 10.5m on the western side meaning an excavation of approximately 12.5m was required. This information meant that the whole project had to be re-evaluated particularly from a risk management perspective. Downer PipeTech was awarded the project in June 2007.