Ny 380 kV kabelrute i Berlin

The 380-kV Kabeldiagonal Berlin Project involves the construction of a new underground 380-kilovolt cable route spanning approximately 6.7 kilometers between the Rudolf-Wissel-Brücke end mast and the Mitte transformer station. This new route is designed to replace the existing infrastructure and significantly increase transmission capacity within Berlin’s electricity grid. The tunnel route proceeds from west to east, passing through key locations including the Charlottenburg transformer station and the Tiergarten park, and is divided into three sections separated by four shaft structures.

Tunnellering med TBM 'Candela'

The tunnel construction is carried out using a tunnel boring machine (TBM) named 'Candela' with a diameter of 3.8 meters. This machine successfully completed the tunneling after approximately 2 years and 9 months, working under challenging urban conditions that demanded high precision and reliability in both construction and foundation engineering. The tunnel sections are built with a single-shell lining system comprised of concrete segments (tubbings) with an inner diameter of 3.0 meters, 27 cm thickness, and 1.2 meters width, reinforced with steel bars and concrete seals. The shafts are constructed using diaphragm walls and anchored bottom slabs to support the excavation, and steel staircases and a monorail system are installed to facilitate access and material handling within the shafts.

Prosjektpartnere og kostnadsoversikt

The project is commissioned by 50Hertz Transmission GmbH, with Markus Schönwälder as the project manager. Initial planning was conducted by IMM and Sweco during the design phase, while Implenia Technical Design Office handled the execution planning. Implenia Civil Engineering GmbH was responsible for the tunnel driving operations. The project is backed by the Elia Group and supported by the Berlin city authorities, highlighting its importance as a key infrastructure upgrade to support Berlin’s energy transition goals. The total estimated construction cost is approximately 127 million Swiss francs.

Miljøhensyn i sentral bykjerne

Due to the central urban location, the project places strong emphasis on minimizing construction-related impacts. All construction machinery is equipped with soot particle filters, and worker accommodations comply with the energy efficiency requirements under ENEV standards. The project also aims to contribute to climate-neutral and sustainable energy solutions by upgrading Berlin’s transmission network to support increased renewable energy integration and supply security.

Anleggstid og sluttfrist 2028

Construction began in August 2019, with an expected completion date set for November 2028. Upon completion, the new 380-kV cable tunnel will ensure a more stable and future-proof electricity supply for Berlin, replacing outdated infrastructure and meeting growing demand in the capital. The project timeline reflects the complexity and technical challenges of tunneling in an urban environment while maintaining operational reliability and environmental responsibility.