Breakfast Creek Trunk Sewer collects sewage flows from Windsor and Newmarket. This trunk sewer main is an integral part of the Brisbane sewer network constructed nearly a hundred years ago, and given the growth and demands on the Brisbane network, a new trunk sewer main is required.
The new trunk sewer main will be 1.8 meters in diameter and a kilometre in length. A vertical launch shaft will be constructed in Perry Park and the retrieval shaft constructed adjacent to the Airport Link off ramp to Lutwyche Road intersection to depths of approximately 14 metres below ground.
Once the launch shaft is constructed, a tunnel boring machine (TBM) will be installed.
The TBM will tunnel through the Brisbane rock 11 metres in depth and over a kilometre before exiting. As the TBM progresses through the rock, 330 segments of reinforced concrete pipe are pushed along by powerful hydraulic jacks through the newly created hole in the rock to form the new sewer main. The TBM is then removed from the retrieval shaft and taken away.