Hannover
Housing project in the water city of Limmer
Hannover, Germany / 11.2024 - 02.2025
Five kilometres from Hanover city centre, the “Wasserstadt Limmer” residential development is taking shape on the former site of Continental AG. On the last remaining building plot, the Oldenburg branch of PORR special civil engineering carried out the deep foundations for three blocks of flats on behalf of the main contractor BöCon. The detailed design, as well as the calculation of pile statics and the preparation of the pile plans, was carried out by PORR special civil engineering planning.
Facts & Figures
Company
PORR Spezialtiefbau Planung GmbH, PORR Spezialtiefbau GmbH
Type
Foundations
Runtime
11.2024 - 02.2025
A new development site in Wasserstadt Limmer
The Wasserstadt Limmer is one of the largest urban development projects in Hanover. The site, covering approximately 23 hectares, is situated between the Hanover-Linden branch canal and the connecting canal to the River Leine. Three residential blocks, each three or four storeys high and comprising a total of 53 flats, are being built on an area of 4,525 m². A communal courtyard forms the centrepiece of the new development site.
Pile foundations in variable subsoil conditions
The upper soil layers in the project area consist of silty soils with limited bearing capacity. Deep foundations down to depths of around 12 metres were therefore required to transfer the loads from the buildings. As the location and composition of the load-bearing soil layers varied within the development site, different embedment depths and pile dimensions were specified. In total, PORR special civil engineering manufactured 259 atlas piles. Of these, 173 piles had diameters of 41/51 cm, as well as 86 piles with diameters of 46/56 cm.
Work below ground
Atlas piles with a helical shaft were used for the deep foundations. The pile system forms part of PORR Spezialtiefbau’s Greenpile® technology and was employed for the foundations of the residential buildings in the project area. The works comprised a total of 259 atlas piles of varying diameters and installation depths, which were tailored to the changing ground conditions. The piles were driven in the immediate vicinity of buildings in Wasserstadt Limmer that had already been completed and were occupied. In addition to the actual foundations, the spatial constraints of the inner-city construction site as well as the existing buildings had to be taken into account.
Foundation for the next construction phase
The pile foundations laid the groundwork for the subsequent building works on the last vacant plot in Wasserstadt Limmer. This paved the way for a further section of the new residential neighbourhood.
