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Crossrail C510 Whitechapel and Liverpool Street Station Tunnels

This project is the 2018 Association of Noise Consultants ( ANC ) Award Winner in the Environmental Noise Category. Southdowns was appointed as the noise and vibration specialists by the Balfour Beatty BeMO Alpine Morgan Sindall Vinci Joint Venture ( BBMV JV) in 2011 to manage the contractor’s requirements with respect to noise and vibration. The C510 contract is widely regarded by the project as one of the more complex tunnelling packages due in part to the close proximity of residential and non-residential noise and vibration sensitive receptors to the main tunnel support worksites. The total value of the contract...


St George’s Park Retirement Village, Ditching Common, West Sussex

Sound Insulation Design and Testing. This major complex comprised the construction and development of 74 new retirement flats, along with a range of on-site facilities including restaurant, bar, gym and retail. Southdowns’ was appointed by the main contractor prior to commencement of works to provide detailed acoustic design advice to ensure that the acoustic performance of the separating walls, floors, lifts and other amenity areas of the building achieved the guideline values and principles of Approved Document E. Subsequent testing of floors and walls was also undertaken on sample floors and walls, following completion of the building works....

Vibro-acoustic mitigation consultants

Northern Line Extension

Southdowns was appointed by CH2M Hill to support the BAM Nuttall Balfour Beatty Joint Venture ( BBB JV) in 2013 during its tendering for the £900m design and build contract for the proposed LU Northern Line Extension. The new 3. 5km extension in twin bored tunnel will link the existing Northern Line station and turnback loop at Kennington to new stations at Nine Elms and Battersea. CH2M Hill was appointed as the main design consultant by the BBB JV during tendering and was responsible for tunnels, stations and trackform. The JV was one of the 2 bidders going into the...