Sustainable pile foundation
Housing project in the water city of Limmer
Hannover, Germany / 11.2024 - 02.2025
Five kilometres from Hanover city centre, the diverse residential quarter ‘Wasserstadt Limmer’ is being built on an industrial wasteland. On behalf of the general contractor BöCon, the Oldenburg branch of PORR special civil engineering constructed the deep foundations with 259 resource-saving atlas piles on the last available building plot. By 2026, three ecological apartment buildings will be built there in accordance with the Passive House Plus standard. The implementation planning, including the calculation of the pile statics and the preparation of the pile plans, was managed by colleagues from PORR special civil engineering planning.
Facts & Figures
Company
PORR Spezialtiefbau Planung GmbH, PORR Spezialtiefbau GmbH
Type
Foundations
Runtime
11.2024 - 02.2025
Sustainable pile foundations for ecological housing project in the water city of Limmer
The subsoil required different settlement depths and pile dimensions
Wasserstadt Limmer is a large-scale urban development project on the 23-hectare former Continental AG factory site in the Linden-Limmer district of Hanover. The site is located on a peninsula between the Hanover-Linden branch canal and the connecting canal to the Leine. Once all construction phases are complete, up to 6,500 people will live in this diverse and nature-oriented quarter. On an area of 4,525 square metres, the JAWA building consortium is constructing three modern three- and four-storey buildings with a total of 53 socially acceptable and environmentally friendly flats at affordable prices. A central square serves as a meeting place for residents.
The first few metres of the subsoil consist of silty soil without sufficient load-bearing capacity. Therefore, pile foundations up to a depth of twelve metres were necessary to transfer the loads. As the horizon and the composition of the load-bearing layers varied greatly, different setting depths and pile dimensions were planned. In total, the PORR special civil engineering team produced 173 atlas piles with a diameter of 41/51 centimetres for the helical pile shaft as well as 86 atlas piles with diameters of 46/56 centimetres.
Sustainable pile system complements ecological construction concept
Due to their reduced concrete consumption and full soil displacement, the slim Atlas Screw piles are part of PORR special civil engineering's Greenpile® technology. The ready-mixed concrete was transported from a concrete plant three kilometres away. Last but not least, the low-noise, vibration-free construction of the foundation was an important aspect in the selection of the method, as the adjacent new buildings are already inhabited.
