Kind: captions
Language: en
once the trains start running these
tunnels will be noisy but right here the
project faces one of its most difficult
construction challenges
the team needs to reduce the amount of
noise coming from this section of track
here we are directly beneath the
Barbican
right directly beneath
opened in 1982 the Barbican Center is an
international hub for arts and culture
London's equivalent of Carnegie Hall
the center's largest venue Barbican Hall
sits one story below ground
consent is the home of the London
Symphony Orchestra presents regular
seasons from the Royal Shakespeare
company it really is one of the truly
great artistic centers in the UK a lot
of music is about exploring the
relationship between the very quietest
sounds and silence and therefore a lot
of performances that really focus on
that magical area of audibility and
that's the problem
Barbican Hall sits just 55 feet above
crossrails tunnels
please or vibrations from trains could
travel through the Earth and into the
concert hall disturbing performances
to guard against this crossrail
Engineers are using ingenious floating
tracks unique concrete slabs of rail
track that sit on special Springs
[Music]
as a train passes over these Springs
they should absorb most of the energy
and reduce noise reaching the theater
boats and trucks have allows that noise
to be brought down even lower
on the surface you won't hear anything
when you're watching Hamlet
it takes over 150 tons of concrete
reinforced with steel bars to form each
hundred foot long floating track slab
we've got all the reinforcements
complete the spring housings are all
installed we've got all the rail and
this slab has been set up to pass the
concrete on top
so that's the liquid gold coming out
there
one set
screw the Springs into place on the
underside of the slab and raise it to
its final height
[Applause]
slabs now cushioned by the springs they
can set the rails on top
[Music]
with this crucial section of the Railway
in place
the team can pick up the pace and lay
track throughout the rest of the tunnels