The Abu Dhabi Strategic Tunnel Enhancement Programme provides a major improvement in the capacity of Abu Dhabi’s waste water system.
The project includes a new deep gravity sewer tunnel which takes the main sewer flows from Abu Dhabi to a new treatment works outside the city, and a series of link sewers connecting into the deep tunnel.
The new deep gravity sewer tunnel is 45km in length. It varies in diameter from 5 to 6-8 metres along its length.
The tunnel was constructed with seven earth pressure balance (EPB) tunnel boring machines (TBMs) which were launched and operated from seven deep shafts.
Abu Dhabi, UAE
Tunnels and Underground Infrastructure, Denmark