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[email protected] · August 9th 17, 09:44 AM posted to uk.transport.london

In article ,
() wrote:

On Tue, 08 Aug 2017 19:42:39 -0500,
wrote:

In article ,
() wrote:

On Tue, 8 Aug 2017 17:47:29 +0100, Basil Jet
wrote:

On 2017\08\08 11:54, Recliner wrote:

That's true of most Tube tunnel portals, as the initial shallow
section is cut and cover. The TBMs only do the deep tunneling.

I've just looked at numerous tube portals in Bing Maps using the 45
degree view. The pair of round portals are clearly visible in most. I
have found none which clearly match your description.

The Picaddilly tunnel where it goes down after Barons Court is just
visible on those maps and isn't round portals.

Only because there's a (fairly short) covered way before the tunnels
start.

So there is a short section on the approach to the tunnels from the
surface that was dug and covered . Seems to match what Recliner
described fairly accurately. Are you saying that section just because
it is short does not count as Cut and Cover.

In the case of the Piccadilly line portal east of Baron's Court it's all
part of the structure of the cutting from which the tunnels start. It's even
possible that part of the covered way was added later when the tracks
between West Kensington and Hammersmith were rearranged when the Piccadilly
was projected westwards in the 1930s.

--
Colin Rosenstiel