Berliner Allee 20 (Hanover)

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The fully mirrored building of the Lower Saxony Medical Association;
Photo from May 2014

Berliner Allee 20 at the corner of Schiffgraben in Hanover is the address of a property owned by the Lower Saxony Medical Association . In addition to its function for organizing the doctors' stalls, the 40-meter-high office building was also planned as a bomb-proof emergency hospital in the event of a third world war. The high-rise built in the 1960s, however, was contaminated with asbestos and formaldehyde and was also poorly insulated against heat loss , so that demolition began in mid-2018 .

History and description

The building for the Lower Saxony Medical Association was originally built by the architect Ernst Friedrich Brockmann between 1964 and 1965, but it was only recently that it was fully glazed with mirrored glass surfaces. As a possible emergency hospital in a Third World War, the corridor widths and the elevator shafts of the more than 38-meter-high concrete building were designed from the outset for the use of hospital beds. Towards the moat, a sacred -looking extension was built as a plenary hall, which dominated the street corner facing the moat.

After a later redesign of the façade as a fully mirrored glass outer skin, serious defects soon became apparent: According to Chamber President Martina Wenker, "renovation [...] would have been uneconomical", so that a later ten-story new building was planned to replace the old building.

For the dismantling of the 1960s building by the Hagedorn company, specialists for joystick remote-controlled, electric demolition hammer - "robots" with a force of up to 14 tons were assigned to smash the individual floors of the high-rise building. The asbestos is disposed of behind a hermetic barrier: the employees in charge go through a four-chamber system with negative pressure, they also have to shower on site and change their clothes. After an almost complete gutting of the individual chunks of concrete, previously with an uncooled should snow gun and spray against the fine dust were treated Development, fall through a holzverschalten shaft down to the basement and be stored there temporarily: This by the temporary debris ballast made “ Ballasting ” is intended to prevent the light, lower floors from being flooded up by groundwater as the demolition progresses. This procedure was also used at the Kröpcke Center , for example .

A total of 50,000 tons of building rubble and 100 tons of other construction site waste are calculated. Around 50 tons are contaminated with asbestos.

In the meantime, vibration detectors had been installed in the neighboring buildings, as they are commonly used in earthquake areas.

The demolition planned until September 2018 is coordinated by Hans-Henrick Dancker, who comes from Denmark, for the Berlin architectural office Grüntuch Ernst, which also designed the new building planned from March 2019. The successor building for the Lower Saxony Medical Association is to be ten storeys high, with rounded edges to give the building “something elegant and modern”.

literature

Web links

Commons : Berliner Allee 20  - Collection of images, videos and audio files

Individual evidence

  1. ↑ a b c d e f g h Conrad von Meding: Robots smash the medical high-rise ... , in: Hannoversche Allgemeine Zeitung from July 5, 2018, p. 19
  2. ^ Friedrich Lindau : Ernst Friedrich Ludwig Brockmann. In: Reconstruction and Destruction. The city in dealing with its architectural identity. With a foreword by Paulhans Peters , 2nd revised edition. Schlütersche , Hannover 2001, ISBN 3-87706-659-3 ; limited preview in Google Book search
  3. ↑ a b Compare the photographs in Hartmut Möller: Ernst F. Brockmann in Hannover (= Architekturzeit 2017 ), Tübingen; Berlin: Ernst Wasmuth Verlag, 2017, ISBN 978-3-8030-0822-0 , p. 122

Coordinates: 52 ° 22 '28.8 "  N , 9 ° 45' 2.4"  E