Low-emission power and precise process engineering: Bauer sets new standards at the Friedrich-Krause-Ufer site in Berlin

• Bauer Spezialtiefbau executes foundation work for office project Port ONE Berlin
• First deployment of the eRG 19 T hybrid from RTG Rammtechnik 
• Challenges posed by urban location of the site 
• Second construction phase almost 50% completed in October

Berlin, Germany – Roaring engines, smoky exhausts and the smell of fumes and diesel – the image of a typical major construction site? Not so at Friedrich-Krause-Ufer in the German capital Berlin. BAUER Spezialtiefbau GmbH, in cooperation with RTG Rammtechnik GmbH, a subsidiary of BAUER Maschinen GmbH, relies on innovative technologies for the 32,000 m² Port ONE Berlin office project that is executed by M-Port Optima Office Center GmbH. “We want to create a better future,” stresses Lars Heilfort, Project Manager at Bauer Spezialtiefbau. “By using the new eRG 19 T hybrid, we demonstrate that construction sites can be efficient as well as quiet and low on emissions.”

Technology meets craftsmanship 

Bauer Spezialtiefbau has been utilizing the latest technology and precise craftsmanship since work began on the construction of the excavation pit and foundations for the new office and commercial building in November 2022. The order: construction of an impermeable excavation pit to create space for underground garages and equipment rooms on the basement levels. Over a total of two construction phases, a combination of Mixed-in-Place method (MIP), a pile wall and an LWS silicate gel base which was developed by Bauer is used. Initially, contaminated soil was replaced and foundation piles were constructed to increase load-bearing capacity. Upon completion of the excavation wall, vibration drilling with the eRG 19 T hybrid was carried out to specified grid spacing. These were then filled with insulation, grout pipes with valves were installed and silicate gel injected to create a stable sealing horizon. This way, the excavation pit stays dry and is ready for the subsequent specialist foundation engineering works.

Quieter, greener, more innovative

A construction site without noise and fumes? The eRG 19 T hybrid from RTG Rammtechnik demonstrates how it’s done. As part of the Port ONE Berlin project, the new development is put through its paces for the first time. The innovative drive combines the power of a 430-kW diesel engine with the precision of an 88-kW electric motor (max. mains connection: 125 A). The unique combination of the two drives makes it possible to keep efficiency at a consistently high level despite the stringent emission requirements at Friedrich-Krause-Ufer. The diesel engine works at reduced capacity, aided by the supporting electric motor, resulting in a significant reduction in both CO₂ emissions as well as noise levels. Lars Heilfort is convinced: “Less noise, fewer emission – we demonstrate how modern construction sites can make a difference.” The hybrid operation of the eRG 19 T hybrid reduces diesel consumption by up to 68% (-17 l/h). This translates into 45 kg less CO₂ per hour. Projected onto a month, that’s a 7 t CO₂ saving – an impressive testament to the benefits of this innovative drive technology.

Versatile game changer

The eRG 19 T hybrid doesn’t just score highly because of its quiet operation but also because of its versatility. With its impressive performance capacity, it masters even demanding impact driving tasks of the next higher equipment group without any problems. But that’s just the start: The electric motor flexibly takes on auxiliary work – efficiently and customer-fit. “Our technology responds to the conditions on site – a real game changer for me,” says the project manager. 

Modular design

Another highlight of the eRG 19 T hybrid is its modular design. The hybrid attachment at the rear contains all electronic components while the electric motor is easy to service with its integration into the quadruple transfer case at the upper carriage. Important data such as electricity consumption and performance can be checked at any time via the driver display. In addition, the maximum connected mains load can be adjusted directly in the operator's cab, depending on availability on site. The elevates flexibility to a whole new level. “With this combination of efficiency, environmental protection and state-of-the-art equipment technology, we set new standards in modern specialist foundation engineering,” Heilfort sums up.

Tight space, great performance

The operation at Friedrich-Krause-Ufer has been running at full speed since the end of July. And the conditions are far from easy: Confined site conditions in an urban setting surrounded by a railroad area and highly sensitive old buildings in the immediate vicinity. Access to the site via a narrow approach road is restricted. But the construction site team is on top of even the most challenging conditions. The first construction phase has already been finished, and the second phase was near 50% completion as of October. Step by step, the foundations for the future are created – robust, low-emission and efficient.