UEA Trenchless completes thrust boring projects for CLM Infrastructure Queensland

Posted 12 August 2011

UEA Trenchless has recently completed two thrust boring projects for CLM Infrastructure Queensland. The first thrust boring contract was part of the Gold Coast Rapid Transit Project and the second was part of a new sewer rising main on the Unity Water Network.

UEA was contracted to supply and install 900mm steel casing using thrust boring methodology to carry 600mm concrete storm water pipes along the Gold Coast Highway as part of the new Gold Coast Rapid Transit project. The Gold Coast Rapid Transit project is the biggest infrastructure project to hit the Gold Coast in a long time, the 13km light rail corridor will run from one end of the Gold Coast to the other servicing the new Gold Coast University Hospital, Griffith University, Southport CBD, Surfers Paradise and Broadbeach.

Trenchless technology had to be used to install the steel casing, as the new alignment passed under an existing Energex pad mount substation in the road reserve which could not be diverted. Due to the existing ground conditions of flowable sand, thrust boring at these diameters was the preferred method. The site was extremely congested with Stage One construction works as well as existing road and pedestrian traffic in Broadbeach which was managed safely by Baulderstone.  Energex were onsite while the thrust boring machine was operating to monitor their live assets located in the work zone.

UEA Trenchless have also completed the installation of 24metres of 700mm steel casing/560mm PE pipe under Pitt Road, Burpengary for a new sewer rising main on the Unity Water network. Thrust boring was the preferred method for this design given it was a large pressure sewer passing under a busy road.  Ground water persisted to fill the working environment and made it difficult under foot at times.  UEA excavated a sump hole and pumped out the ground water continuously during work hours. Once the PE pipe was installed, grouting was completed and left for CLM to continue with the pipeline.