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Offshore base port Cuxhaven Berth 9

Client
Niedersachsen Ports GmbH & Co. KG
Services
Civil and hydraulic engineering
ARGE partner
Depenbrock | Josef Möbius | Tiefbau GmbH Unterweser | Heinrich Hirdes
Project volume
approx. € 59.7 million

Project

The contract for the construction of offshore LP 9 in Cuxhaven was awarded to the consortium consisting of Depenbrock, Josef Möbius, Tiefbau GmbH Unterweser and Heinrich Hirdes on the basis of a side offer with optimized finger piers and sheet pile wall construction. The project was completed between March 2010 and December 2012.

The existing offshore base port LP 8 (see also reference projects) was thus extended by a length of 680 meters. The quay wall is divided into the general cargo berth, the bulk cargo berth and the rinsing field berth. In addition, a finger pier was planned for shipping wind power foundations using a catamaran installation vessel. In addition to the core services, consisting of piling and reinforced concrete work, dredging, drainage and road construction work was also carried out.

The main challenge of this project was the demanding local subsoil conditions with deep-lying soft layers. In cooperation with the soil expert, various test loads were applied to the load-bearing elements and evaluated, and concepts for pre-consolidating the soft layers were developed.

Following successful implementation planning by the Depenbrock technical office, the project was implemented using the company’s own equipment units.

The combined sheet pile wall consisting of Ø1420 mm support pipes with lengths of up to 30 m were anchored back with driven Peiner inclined piles with lengths of up to 50 m. A low-lying shielding plate was provided to relieve the sheet pile wall for the very high surface loads. The foundation of the slab with 3 to 4 rows of piles was carried out using in-situ concrete driven piles Ø61 cm with lengths of up to 36 m.

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