The new buildings "Belle Harbour Hamburg" and "Sportlerhaus" on construction sites 100a and 100b in Hamburg's Baakenhafen quarter share an underground car park. Therefore, the contract for the deep foundations was jointly awarded to the Oldenburg branch by the building owners in December 2022. The Seevetal team of Stump-Franki Planung took on the execution planning. As is so often the case in Hamburg's HafenCity, existing anchors in the subsoil required special care during execution.
Sustainable and inclusive living in the "urban village" Baakenhafen
On both sides of the Baaken basin, the new Baakenhafen sub-district is being built on former harbour land. On site 100a, a Belle Harbour Hamburg building association is constructing the point house. It will be integrated according to the concept of an extended living community for people with and without visual impairments and will open its communal areas to the entire quarter. The z-shaped building on the neighbouring plot will be realised by the Sportlerhaus building association as a KfW Efficiency House 55. It offers price-insulated condominiums for young families and houses the clubhouse of the new quarter sports club SV Baakenhafen 2020 e.V. in addition to commercial and office space.
TVB piles and Fundex piles were combined
The back anchoring of the quay wall protrudes into the construction areas. In order to avoid effects on the existing anchors due to laterally displaced soil, 127 Partial displacement bored piles (TVB) with a diameter of 61 cm and lengths of up to 15.5 m were used in this area. In the areas facing away from the water, 144 Fundex full displacement drilled piles with lengths up to 11.5 m and diameters of 44 cm were constructed. The benefits of the fundex piles: With their full displacement system, no drilled material is produced, which improves the CO2 balance of the project. In addition, the smaller pile diameter saves concrete, which also reduces CO2 and costs. When combining the two methods, the different settlement behaviour had to be taken into account. The experts from Stump-Franki Planung therefore worked closely with the structural engineers and were able to handle the project without any problems thanks to their many years of experience.
Stump-Franki project manager Lars Brömstrup on the project: "Thanks to our large equipment fleet, we are very broadly positioned and were therefore able to execute both pile systems safely and economically with our own personnel." He adds: "Hamburg is always good for a surprise, both below and above ground. We were very lucky that the high water in February did not turn into a storm surge. In that case, we would have had to move all the equipment to a higher site."
