The West Link is a new railway alignment under construction in the city of Gothenburg, Sweden, consisting of 8 km of double-track railway, including 6km line tunnels and 3 new stations. SGS is in charge of the executive and construction design of the tunnel section within Kvarnberget area, which includes excavation in the soft clays typical of the area and hard rock. A top-down construction between d-walls has been currently proposed for these works. The preliminary archaeological excavation has started in 2019 while the main works are on going. In particular, ground improvement has been carried out through Deep Soil Mixing and reinforced concrete diaphragm walls have been installed.