Noise and Vibration – Melbourne Metro Rail Project
Articles, Blog

Noise and Vibration – Melbourne Metro Rail Project

September 11, 2019

Noise and vibration is a very personal thing
and people react very, very differently to noise and vibration. We live in a city and
cities are noisy places. We are exposed to lots of noises within the
city that we’re used to and we don’t tend to notice. What we’re looking at as part of the project
is airborne noise, which comes from a specific source and we hear it at our ears. We’re also looking at vibration, which will
travel through the ground and that’s something that we feel. We’re looking at noise and vibration
associated with construction and we’re also looking at noise and vibration associated
with operation. We’re specifically looking at airborne noise
related to the construction sites that will be at various locations, including the stations
and some of the emergency access shafts. In the case of the tunnelling works, they
will create vibration and it’s heard as a low frequency rumble. And it’s quite interesting
because in Melbourne, we’re quite used to ground-borne noise because we’ve
got a lot of tram movements. And if you think of when you’re in a building,
and the doors are closed, windows are closed but you can hear you can still hear the tram,
and it’s a low-frequency rumble. That’s the sort of thing that we’re talking about, when
we’re talking about ground borne noise. For the most part, all our work will be underground
and you will only really notice us when we come to surface at the stations or at the
portals. So it’s quite a minimal disruption compared to other methods. We’re looking at an enormous number of sensitive
receivers, residential locations, hospitals, hotels. For areas where we have high rise buildings,
and in particular where there may be evening or night time work, we’ve actually looked
at implementing acoustic construction sheds. They’re going to be very big. They’re going
to allow trucks to enter them and for work to be undertaken within them. Major infrastructure requires construction.
There will be noise and vibration associated with it, but once that is complete we’ll have
a fabulous new rail line.

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