Andreasturm

Short description

SBB Immobilien, the real estate department of the Swiss Federal Railways, is building the Andreasturm (Andreas Tower) near to Zurich-Oerlikon station. The 80 m high office building is located on a triangular building plot between two main rail tracks in the northeast of the station and the Amstein-Walthert building.

The project

The Andreasturm high rise is designed as an office building with an employee cafeteria and conference facility for the anchor tenant on the 1st upper floor and publicly appealing retail and restaurant use on the ground floor. The basement floors contain storage rooms, bicycle parking spaces, building technology systems and the car park. At about 80 meters in height, the Andreasturm is perceived to be an essential landmark at the Oerlikon train station.

The difference in height between the tracks and the floor slab of the new building is about 20 m, while the horizontal distance between the building walls and the tracks is only 5 m. As a total contractor, we were able to realize the entire construction pit under the tightest space conditions and on schedule.

Services in detail

  • New construction as total contractor
  • Cut-and-cover excavation (top-down): 30‘000 m3
  • Pit wall construction: 5‘500 m2 diaphragm wall of 800 mm / 1000 mm width up to 50 m depth
  • Foundations: 57 diaphragm wall elements up to 45 m depth, 94 primary steel piles with ± 20 mm installation tolerance, 21 bored piles DN 1‘500 mm up to 40 m depth
  • Permanent anchors:  200 anchors up to 42 m length | L3 – L6

Challenges

  • Narrow space, directly next to the busy railway line in the direction of Zurich Airport (building works without interruption of railway traffic)
  • Classic cut-and-cover method

Sustainability

  • DGNB / SGNI label “Platinum”