The Hong Kong-Zhuhai-Macao bridge project is a mega-sized sea crossing linking the city of Zhuhai with Hong Kong and Macao at the waters of Pearl River estuary. This highway link comprise 23 km of dual 3-lane bridge and a 6,7 km immersed tube tunnel (said to be the worlds longest).
The construction of an immersed tube tunnel is a great challenge concerning the ventilation. After the tunnel segments have been placed at the seafloor, a massive concrete work starts since 1,2 m thick layer of concrete must be poured to the segments floor in order to keep the segments in place. During this work, not only will there be a great number of concrete trucks inside the tunnel but also will the concrete emit lot of heat when hardening.
SWEDFAN delivered 4 larger fan stations 250 kW and 13 km of 2,6 diameter ducting.
The project is assumed to be finished early 2018.