The project comprises a 13-kilometre-long sewage tunnel as well as eight access shafts and drop structures.
The drainage tunnel will accommodate the drainage flows from the current and future drainage network in different areas in Al Wakra and Al Wukair, and transfer these flows to Al Wakra and Al Wukair Sewage Treatment Works. The project comprises the design and construction of a 13.3 km long TBM sewage tunnel in double-shell construction with 4500 mm inner diameter and up to 61 m depth, eight access shafts and drop structures, which are all part of the Wakrah - Wukair and Industrial Area sewage network.
Two tunnel boring machines with a boring diameter of 5,885 mm will bore the 13.3 km long tunnel and establish the tunnel’s outer shell by means of segments. Since the start of construction already all temporary shotcrete shafts with a maximum diameter of more than 20m and a depth of up to 63m have been excavated. In the shotcrete shafts the erection of the permanent shaft structures has already begun and the construction measures shall be concluded in early summer of 2024.
The design is carried out using the Building Information Modelling (BIM) method.
