MULTI-STOREY DETACHED HOUSE

THE PROJECT AND ITS REQUIREMENTS

Several detached houses have been built in close proximity to a regional and suburban train railway line in the municipality of Bad Endorf in Upper Bavaria.
The structural dynamics surveyor predicted high levels of emissions from vibration and secondary airborne noise, and recommended the installation of an elastic building support system with a tuning frequency of approximately 7 Hz.
 
The goal was to develop an economical solution for providing the building with an elastic support system which would protect the occupants from vibration and secondary airborne noise caused by the adjacent railway traffic.

THE SOLUTION

The design that was produced by Calenberg proposed the use of the Cibatur elastomer bearing in the form of strips (rather than covering the entire surface). The horizontal slab support beneath the foundation slab and the strip foundations was implemented using a double layer of Cibatur. Since Cibatur provides consistently low natural frequencies across a very wide load range, the foundation
sections with the differing loads could be provided with bearing strips of the same width. Prestressed hollow-core concrete slabs were then laid onto the Cibatur, and the joints between the slabs were grouted to prevent sound bridges.