2005 Munich, The Charles Hotel
Between 2005 and 2007, the Lenbachgaerten were newly designed in the centre of Munich. The investor had planned several luxury buildings including a hotel, offices and apartments. There are four tracks of an underground line next to the property.
For the design and choice of the vibration protection, the requirement of very high immission protection had to be considered for the hotel, offices and freehold flats (total investment about 300 million euros).
The investor simply specified: "Feel nothing, hear nothing." The elastic joint had to be in 12 m depth and had to lie 6 m below the water table. So far no suitable components existed for such a support condition.
According to design calculations by the structural engineer, the elastic support had to be constructed with a natural frequency of 11 Hz so as to meet the stipulated immission limits. It was possible to partially support the structures (reduction of the elastic support area by half of the ground floor area of the buildings concerned).
Calenberg Ingenieure developed Calenberg Cimax® which is the Cibatur® product enclosed in a permanently watertight EPDM casing. The required insertion loss could easily be met. The chosen solution assures an optimum cost-benefit ratio. The specifications of the client were fully met as was shown by measurements during construction and after completion of the building.
Calenberg Ingenieure GmbHAm Knübel 2-4
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