|
Bennett Associates, the South Yorkshire based Mechanical and
Structural Design Consulting Engineers, was commissioned by Tarmac Construction
Ltd, Tunnelling Division, to carry out the structural Design of an 'Acoustic
Shroud'. The structure was necessary to reduce noise pollution around the
excavation of the access shaft for the passenger interchange tunnel at Green
Park Station for the Jubilee Line Extension.
As work was carried out around the clock stringent noise emission
parameters were placed upon the constructors by Westminster City Council (WCC).
Bennett Associates was involved in direct discussions with WCC during the
planning phase of the project at which the noise emission levels were set which
varied according to the time of day or week.
These set maximum levels, as low as 35dB, were achieved during the
demolition of a reinforced concrete six storey block of offices which stood on
the site, and also while construction work was under way. This is believed to be
the first time an 'Acoustic Shroud' has been used to enclose a site like this
and much can be said for the success of the project as it allowed businesses and
residents to continue as normal while work progressed.
The structure not only had to meet stringent noise reduction
levels but also had to be designed to include the structural steel members which
supported all the operational and domestic requirements related to a major
construction operation such as this. It also had to allow ingress and egress of
all materials and equipment.
The photographs illustrate the close confines in which all the
services and construction equipment had to be located and the close proximity of
the temporary building to residential and business premises in the heart of
London's West End.
For more information, contact us on
01709-373782.
Related links:
 Expert
Witness
Finite
Element Analysis
|
