S-Bahn-Stammstrecke München - Neubau Haltepunkt Marienhof

Undergrunnsstasjon med avansert utgravning

The construction project 'S-Bahn-Stammstrecke München - Neubau Haltepunkt Marienhof' is a significant part of the larger 2nd S-Bahn trunk line expansion in Munich. It comprises multiple subcomponents including above-ground sections, an inner-city tunnel segment, and network-enhancing works in the outer areas. The central focus of this project is the new underground Marienhof station, which is being constructed using diaphragm wall and cover slab techniques. To secure the excavation pit, a system of anchored sheet pile walls and extensive groundwater management measures are employed. The design also includes the excavation of connecting adits between the distributor level and the U-Bahn (subway) platform levels of lines U3 and U6, executed via pressurized mining tunnelling methods over tunnel sections approximately 65 meters long in both east and west directions.

Prosjektteam og logistikkutfordringer

The project is commissioned by several subsidiaries of DB Netz AG, including DB Station & Service AG and DB Energie GmbH. The planning and construction supervision are managed by an engineering consortium featuring firms such as SSF Ingenieure AG and Arcadis Germany GmbH. The technical and commercial management responsibilities lie with Implenia Construction GmbH and Hochtief Infrastructure GmbH, who jointly form the working group 'ARGE Marienhof.' The total budget for the work is approximately 394.7 million euros, with the operational launch targeted for 2028. One of the prominent challenges is managing urban logistics and construction constraints within the densely built and trafficked inner-city area surrounding Marienhof, necessitating meticulous planning to minimize disruption and safeguard neighboring buildings and existing metro structures.

Europas første elektriske hjullaster

A notable advancement in this project is the pioneering use of Europe's first fully electric wheel loader, the Volvo L120 Electric, within the underground construction environment. Operating under pressurized tunnel conditions to keep groundwater at bay, diesel-powered machinery is prohibited due to fire hazard concerns. The electric wheel loader, weighing 20 tons and equipped with an eight-hour battery capacity, transports excavated material efficiently and quietly directly from the tunnel face to transport containers. This emission-free equipment not only improves onsite air quality and reduces noise, enhancing worker safety and health, but also significantly elevates logistical efficiency in the confined and sensitive tunnel construction zones.

Forpliktelse til klimaneutralitet

The integration of the fully electric loader exemplifies the project's strong commitment to environmental sustainability and climate goals. Implenia, as a key contractor, aims to achieve climate neutrality by 2050, actively reducing direct emissions through the substitution of diesel-powered equipment with electric alternatives. This approach contributes to lowering the carbon footprint of construction activities (Scope 1 emissions) and sets a precedent for future infrastructure endeavors striving for greener and healthier work environments. The experiences and knowledge gained from using such innovative, low-emission machinery are intended to guide and accelerate the transition toward more sustainable construction practices across the industry.