Zublin South East Asia and Australia has won two tunnelling contracts in Abu Dhabi worth $450 million.
Part of the Strategic Tunnel Enhancement Program by the Abu Dhabi Sewerage Services Company, it consists of a 40 kilometre long deep wastewater tunnel with a pumping station and a network of link sewers connecting to the existing system.
According to Zublin, the new wastewater will discharge the complete sewerage of the city of Abu Dhabi.
The first contract award is for the Link Sewer and consists of the construction of a 35.7 kilometre sewerage network with diameters ranging from 200mm through to 2800mm, and 247 shafts for manholes with depths between eight metres and 26 metres.
The second consists of the construction of a 15.4 kilometre sewerage network with diameters between 200mm and 3100mm, and 95 manholes shafts up to depth of 26 metres.
Pipe-jacking will be used for the construction of both sewer tunnels.
The construction will run over 39 months.