Bruel & Kjaer UK Ltd. - PRODUCT NEWS

Crossrail Project on the right track

A noise monitoring system on London's huge rail project ensures construction noise compliance

Noise from the construction work on London's Crossrail project has become less of a concern for residents, as the building contractor is using Noise Sentinel to manage the noise impact.

Project C501 Moorgate Shaft, which is part of the Crossrail infrastructure project, is one of the most constrained construction sites on the scheme. The site is surrounded on all sides by commercial, residential, educational and London Underground premises.

Operating conditions established with the City of London are complex, in order to both 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 fulfil obligations to the Local Authority and project owners, Crossrail. With advice from consultants Anderson Acoustics, BNK JV chose Brüel & Kjær’s Noise Sentinel to help manage noise impact.

Chosen for its ability to perform real-time measurement and alerting, Noise Sentinel delivers the immediacy necessary to help manage site activity. Noise Sentinel will also enable the contractors to keep costs down, as the system offers a fixed monthly subscription fee over the life of the project.

Noise Sentinel is a web-based noise management service which continuously assesses noise levels and alerts designated people, enabling them to take immediate action should levels exceed defined limits. The system comprises three real-time noise monitors stationed at key locations around the site, that are constantly recording data. A further fourth terminal is located at the centre of the site to help determine if noise exceedances are the result of construction activity.

Construction shift teams are equipped with a duty phone that receives warnings or alerts from Noise Sentinel via email and SMS so that they can react quickly and proactively to potential noise breaches, rather than reacting afterwards.

The system is cloud-based, allowing any member of the team access to web pages that detail real-time noise levels. Here, amber warnings indicate a potential breach, and red warnings indicate an actual breach. Historical noise data can also be viewed.

The Crossrail services are expected to start operation in 2018 and be fully operational in 2019.

The full case study is available on:

About Bruel & Kjaer
Brüel & Kjær is a world-leading manufacturer and supplier of sound and vibration solutions for use in a wide range of applications including environmental noise measurements, building acoustics, vibration measurements and quality control for use in the automotive, aerospace and consumer industries, as well as by local authorities. Today Brüel & Kjær has 900 employees and sales offices in 55 countries. Brüel & Kjær is a subsidiary of UK-based Spectris plc. ( Spectris has annual sales of approximately £656m and employs around 6000 people worldwide in its 15 business units.

June 2014

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