Existing Building Vibration Control

 

 

 

Existing building vibration isolation is crucial for mitigating the impact of external vibrations on structures. Whether it’s from nearby traffic, industrial operations, or construction activities, vibrations can compromise the integrity and comfort of buildings. By implementing effective isolation measures, such as resilient mounts, damping systems, or isolation pads, existing structures can be shielded from these disturbances.

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Vibration Isolation

Whilst Approved Document Part E of the Building Regulations allows some relaxation on the target impact and airborne performance for buildings formed by a material change of use, client’s expectations do not change.

Transforming old Victorian townhouses into luxury flats and exclusive properties in prime London areas like Mayfair presents developers with two challenging considerations: potential proximity to bustling Victoria, Piccadilly, and Jubilee Lines, and the high expectations of discerning clients regarding noise levels.

Throughout London, maximizing property square footage often translates to substantial increases in property value. To achieve this, developers and homeowners are increasingly extending living space underground, delving one or two floors below ground level. However, this expansion brings foundations closer to the network of tube lines crisscrossing the capital. The reduced distance to vibration sources not only poses potential re-radiated noise challenges in the newly created basement areas but also affects the rest of the existing property.

Isolating noise within existing buildings is commonly achieved through a “box-in-box” approach for key noise-sensitive areas like bedrooms, employing floating floors, wall treatments, and ceiling treatments. However, for full building isolation, options include bearing a new basement slab across the surface, installing strip isolation beneath new concrete underpins, or utilizing jacking and point bearing insertion into the existing structure.

TVS Acoustics successfully completed a project on Queen Street in Mayfair, recognized with a Vibration Category award at the Annual Association of Noise Consultants (ANC) Awards for Vibration in 2016. The project involved the conversion of two existing townhouses, previously commercial properties, into luxury residential apartments. Situated directly above the Jubilee Tube line, initial assessments revealed concerning re-radiated noise levels reaching approximately 45dBA Lmax within the building. Despite the property being listed, the client emphasized the importance of maximizing floor space. Employing an innovative approach and utilizing Sylomer and Sylodyn materials, our solution significantly reduced Lmax levels by over 15dB, surpassing the client’s stringent requirements.

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large building vibration isolation

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