Bouygues Immobilier

Choisy-le-Roi, France

Property owner

Bouygues Immobilier

Main contractor

MTR

Architect

Cité Architecture

Acoustic consultant

Impédance

Structural engineer

Details

13 tonnes on elastomer bearings & 15 tonnes on springs

Building type

Residential & Hotel

Intervention level

Structural

Bouygues Immobilier turned to CDM Group to ensure that no vibrations or noise pollution from the nearby railway tracks could reach their latest development project in Choisy-le-Roi. A combination of CDM-CHR springs and CDM-SEB and CDM-VHS elastomer bearings were used to isolate the buildings.

We had to use all our know-how to tackle the challenge that Bouygues Immobilier had set out for us, namely ensuring that the six residental buildings located near the RER C train tracks don’t feel the vibrations.

Beyond the number of buildings the real challenge was to meet the different vibration isolation objectives:

 

  • On the one hand, offer a solution with a cutoff frequency of 4 Hz: 13,000 tons for 2 buildings supported by CDM-CHR springs.
  • For the other 4 buildings, cutoff vibration at 10 Hz: 15,000 tons supported by CDM-VHS and CDM-SEB elastomer brearings.

CDM-SEB

CDM-VHS

CDM-CHR

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