In message , at 20:24:40 on Thu, 4 Jun 2015,
Mizter T remarked:

HS1 ate someone's back garden in the Stratford area.

Which is just wot I said in my earlier post!

Ah. Yes. But "tunnelling collapse" doesn't always produce a sink hole.
The Crossrail one for example.

But there was another in the middle of Heathrow when they were building
HEx (with the same sort of sprayed concrete design as Crossrail).
--
Roland Perry

In article lmk0na91dm9c3804bigkkk88tfk5i5s09l@None,
(Arthur Conan Doyle) wrote:

Roland Perry wrote:

Not really, much of them will be worn out, and it's a real issue getting
them out of the ground.

Surprised they didn't just leave them like they did with the Chunnel
TBMs.

The two that have recently arrived at Farringdon will be buried there.

--
Colin Rosenstiel

In article , (Roland
Perry) wrote:

In message , at 20:24:40 on Thu, 4 Jun
2015, Mizter T remarked:

HS1 ate someone's back garden in the Stratford area.

Which is just wot I said in my earlier post!

Ah. Yes. But "tunnelling collapse" doesn't always produce a sink
hole. The Crossrail one for example.

But there was another in the middle of Heathrow when they were
building HEx (with the same sort of sprayed concrete design as
Crossrail).

That was the aforementioned NATM incident.

--
Colin Rosenstiel

wrote:
In article lmk0na91dm9c3804bigkkk88tfk5i5s09l@None,
(Arthur Conan Doyle) wrote:

Roland Perry wrote:

Not really, much of them will be worn out, and it's a real issue getting
them out of the ground.

Surprised they didn't just leave them like they did with the Chunnel
TBMs.

The two that have recently arrived at Farringdon will be buried there.

Actually, I thought these would be removed; it's the earlier one(s) that
were left there. It's easy to remove TBMs that emerge into a large station
tunnel, but difficult to remove the cutter head that first cuts that
tunnel. Instead, it's easier to steer it sideways, abandon the cutter head,
but dismantle and remove the long mobile tunnel 'factory' behind it.

On 04/06/2015 20:39, Roland Perry wrote:
In message , at 20:24:40 on Thu, 4 Jun 2015,
Mizter T remarked:

HS1 ate someone's back garden in the Stratford area.

Which is just wot I said in my earlier post!

Ah. Yes. But "tunnelling collapse" doesn't always produce a sink hole.
The Crossrail one for example.

But there was another in the middle of Heathrow when they were building
HEx (with the same sort of sprayed concrete design as Crossrail).

There's a hole in my bucket...

--
Arthur Figgis Surrey, UK