Thread: Modern Railways
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Old February 21st 21, 05:29 PM posted to
Recliner[_4_] Recliner[_4_] is offline
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Default Modern Railways

Basil Jet wrote:
On 21/02/2021 17:06, Recliner wrote:
Anna Noyd-Dryver wrote:
Roland Perry wrote:
In message , at 10:11:15 on Fri, 19 Feb
2021, Recliner remarked:
Basil Jet wrote:

"The Battersea Branch will be the first extension to the Underground
network since the Jubilee Line Extension from Green Park to Stratford"

is sortable by opening date, forgetting is a major

You're quite right, of course, but I suppose they don't regard the
additional Heathrow station as an extension.

It's approx 2km, so rather more than just a new station.

Topographically it's almost identical to the Battersea Branch (~3.5km)
but maybe the writer thought it was like T4?

T4 involved 6.1km of new single-track tunnel.

Those almost straight new tunnels are among the loudest on the whole LU
network. It's almost painful. Does anyone know why?

If you mean the T5 tunnel, I imagine they're the only part of the tube
constructed with NATM.

Parts of the central HEx station famously use NATM, but I don't think any
of the Tube or HEx running tunnels used NATM. They look like normal deep
bored tube concrete ring tunnels, as used on the JLE and probably the
Battersea extension.

Those T5 tunnels are fairly shallow and have heavy airliners parked or
taxiing above, so I wonder if they use a more sturdy construction than
usual tube tunnels?