Client:
Water Corporation of Western Australia
Construction period:
2006 – 2010
City/Country:
Australia
Contract value:
€ 152 million
Alkimos Wastewater Treatment Scheme
Australia
Successfully mastering complex geology
What may appear at first glance to be a conventional wastewater pipeline proved to be a project requiring exceptional technical expertise. In the northern suburbs of Perth, STRABAG constructed a 6,3-kilometre wastewater sewer, connecting the existing Quinns Main Sewer to the new Alkimos Wastewater Treatment Plant.
The main sewer line, with an internal diameter of 2,0 metres, was installed using pipe jacking technology. Along the route, the project team encountered highly variable ground conditions consisting of both sand and hard rock. A key element was the construction of 13 jacking and receiving shafts with depths of up to 20 metres. The pipe jacking works were carried out using a 15-metre-long tunnel boring machine (TBM) capable of delivering a maximum torque of 800 kNm.
In recognition of its outstanding construction achievements, the project received the Earth Award in 2011.
Scope of Work
- Construction of a 6,3 km wastewater sewer
- Execution of pipe jacking works
- Construction of 13 launch and reception shafts
- Works in complex geological conditions
- Deployment of a 15 m long TBM