Berlin Hauptbahnhof — Southern Concourse
14,800 m² extension, glass-and-steel canopy spanning four ICE platforms. Built without interrupting service.
What we did
Hextal served as the lead civil engineering contractor, responsible for all structural design, ground engineering, materials procurement and on-site construction management. Our scope encompassed full lifecycle delivery from mobilisation through commissioning, with integrated environmental monitoring and stakeholder coordination throughout.
Every project begins with a problem no one has solved before.
The challenge
The existing station remained fully operational throughout the build, processing 340,000 passengers daily. Any disruption to ICE, S-Bahn or regional services required six months advance notice to Deutsche Bahn. Structural surveys revealed the original 1960s foundations were undersized for the new glass-and-steel canopy, demanding a complete underpinning programme beneath live platforms.
The solution
Hextal developed a phased construction sequence that isolated work zones using temporary acoustic and safety screens, allowing platform-level construction during four-hour overnight windows. Foundation underpinning was achieved through micropile installation using low-vibration hydraulic rigs. The canopy steelwork was pre-assembled off-site in 42-tonne sections and lifted into position by a custom gantry crane that straddled the active rail lines without encroaching on the overhead catenary system.
Mobilisation
Design
Procurement
Construction
Commissioning
Led by Dr. Annika Brandt
The project team comprises 340 engineers, site supervisors and specialist subcontractors drawn from across the Hextal Group. Core disciplines include structural engineering, geotechnics, materials science, environmental management and digital delivery. The team operates from a dedicated site office with full BIM coordination capability.
Programme oversight is provided by the Group Executive Committee through quarterly stage-gate reviews. Health and safety performance is reported weekly to the Chief Operating Officer.
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