Channel Tunnel delays for months

[Graham Murray]

Tony Polson <docnews2011@***************> writes:

> There are two crossover caverns where the tracks from two running
> tunnels are in one large cavern with a double crossover in it.

So let us hope that there is never a fire or derailment in one of those
caverns.

[Lüko Willms]

Am Tue, 16 Sep 2008 20:46:15 UTC, schrieb "BH Williams"
<bhwilliams@letra.co.uk> auf uk.railway :

> > The next question surely has to be "What is the maximum allowed speed of
> > trains when crossing over?".

> 60 kph, IIRC

I am just looking at this video about changing the points (switch)
in the tunnel, and they speak about 160 km/h the points has to be able
to bear. But that might be for straight running, not changing to the
other side.

Cheers,
L.W.

[BH Williams]

"Lüko Willms" <l.willms@domain.invalid> wrote in message
news:czd2LKcn8EGd-pn2-dLSdvJiB9dQh@lueko.willms.dialin.t-online.de...
> Am Tue, 16 Sep 2008 20:46:15 UTC, schrieb "BH Williams"
> <bhwilliams@letra.co.uk> auf uk.railway :
>
>> > The next question surely has to be "What is the maximum allowed speed
>> > of
>> > trains when crossing over?".
>
>> 60 kph, IIRC
>
> I am just looking at this video about changing the points (switch)
> in the tunnel, and they speak about 160 km/h the points has to be able
> to bear. But that might be for straight running, not changing to the
> other side.
>
>
> Cheers,
> L.W.
>
>
That is for straight running, with the crossover doors shut. The speed when
traversing the points from one tunnel to another is 60kph.
With regards to TP's answer- I can confirm that.
Brian

[Lüko Willms]

Am Wed, 17 Sep 2008 07:49:18 UTC, schrieb "BH Williams"
<bhwilliams@letra.co.uk> auf uk.railway :

> With regards to TP's answer-

Am Mon, 15 Sep 2008 21:23:04 UTC, schrieb Tony Polson
<docnews2011@***************> auf uk.railway :

> You're right about the service tunnel. From memory, it dives under
> the crossover caverns at these points then returns to its usual
> position in the centre.
>


> I can confirm that.

That's what I thought when I saw in that video[1] the workers
climbing several staircases to get to their workplace at the points
(switch).

I just wonder -- is the access to the service tunnel around those
crossovers always via long stairs?

Cheers,
L.W.

[1] Finally I got the audio in my main PC working again and revisited
several video sites, Bahn TV among them.

[BH Williams]

> "BH Williams" <bhwilliams@letra.co.uk> wrote:
>>
>>That is for straight running, with the crossover doors shut. The speed
>>when
>>traversing the points from one tunnel to another is 60kph.
>>With regards to TP's answer- I can confirm that.
>
>
> Thanks Brian.
>
> Your job must be pretty stressful just now. Hang in there. ;-)
>
>
No more than normal- there are somewhat more crews than trains for the
present. Hopefully, at least one of the north tunnel intervals will be
handed back shortly (I read tomorrow in the press), which will mean we can
ramp things up a bit. The real fun starts when the builders move in, and
start disturbing the dust...
Brian