04 Oct 2019

Continuous noise monitoring helps get Moorgate shaft across the line

Continuous noise monitoring helps get Moorgate shaft across the line

BACKGROUND

The C501 Moorgate Shaft is a 35 x 35m, 55m deep hole excavated right next to the existing Moorgate Station. 60 meter deep reinforced concrete panels form a box below ground to house the western underground ticket hall serving the Crossrail station.

THE CHALLENGE

The construction site is one of the most constrained on the Crossrail scheme. It is surrounded on all sides by commercial, residential, educational and London Underground premises.'
Operating conditions, established with the City of London, are complex so as to limit noise impact and provide periods of respite to the different stakeholders throughout the working day. Permitted noise levels vary up to 12 times throughout the day.'
The main project contractor, BAM Nuttall Kier Joint Venture (BNK JV), needed to be sure that the priorities and expectations of stakeholders were met, while enabling the'project team to make progress with construction and fulfill obligations to the Local Authority and project owners, Crossrail.'

A particular challenge at C501 is the close proximity of other buildings and the wide variety of neighbors to consider regarding noise nuisance.'


Adjacent to the site is Moor House, one of London's largest office buildings and there are also hotels, a school and an exclusive apartment building nearby. In such a built-up area there are also many sources of noise other than the construction at Moorgate.'


Air, road and rail transport create significant noise disturbance as well as other nearby construction sites. This makes it a challenge to keep construction noise levels below limits and also to determine the cause should a breach occur

FIND OUT MORE


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THOUSANDS

Over 2 days

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100'S

At Olympia London's Grand Hall

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500+

Across 8 Stages

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