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Old May 19th, 2019, 03:07 PM   #7441
Enzo Morris
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Quote:
Originally Posted by Stuu View Post
I know that's what happens with TBMs, that's what happened to the Crossrail ones. They are gone, ex, deceased, shuffled off this mortal coil etc. So could you please explain how they are 'reserved' for HS2?

'They' have managed a similar problem with the Severn Tunnel for 140 years, so I should think it will be ok. Tunnels leak, they always have done. This is not news. I assume you have evidence this wasn't the plan all along?
The TMBs have not been scrapped. The Connaught tunnel is very short, nothing remotely like the old Severn Tunnel. It was supposed to be watertight. They hope the pumps will cope.
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Old May 19th, 2019, 04:59 PM   #7442
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The only solution is to cancel Crossrail.
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Old May 20th, 2019, 08:07 AM   #7443
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Quote:
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The TMBs have not been scrapped.
It is my understanding that ALL TBM's are designed and built for the specific job they are to do. It is NOT a "one size fits all" proposition.

If you bothered to do a bit of homework instead of propogating rubbish on this forum, you could have found out what happened to the TBM's.

What happened to each of the TBMs?
Similar to the TBMs Mary, Sophia, Jessica, Ellie, Phyllis and Ada, the remaining machines Victoria and Elizabeth will now be dismantled. Their 130 m trailers will be removed from the tunnel via the shaft at Stepney Green and returned to manufacturer Herrenknecht, with parts recycled for future tunnelling projects. The cutterheads will be cut into small pieces and removed via the shaft at Farringdon. The front “cans” of each machine will be left in the tunnel, and Crossrail trains will pass through them when services begin in 2018.
https://www.tunnel-online.info/en/ar...s_2375219.html
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Old May 20th, 2019, 10:06 AM   #7444
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All very nice indeed, but your understanding is not in synch. I am relaying what the engineers tell me. I have also been down lengths of Crossrail tunnel. The TBMs have not been scrapped as the article you posted stated. All large TBMs are dismantled after a job as they are just too big. TBMs are not built for each job at all. They are always re-worked/maintained after each job then re-used with amendments to suit, as they are just too expensive to scrap. TBMs are not one set diameter. HS2 is to be two tunnel diameters. There is a whole train of equipment behind the rotating cutters. If you have ever seen one, the rotating cutters are just a small part of the whole equipment train.

https://assets.publishing.service.go...ction_v1.3.pdf

Now you know.

Last edited by Enzo Morris; May 20th, 2019 at 10:19 AM.
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Old May 20th, 2019, 10:19 AM   #7445
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The order for the class 345 Aventras should be cancelled. Crossrail tunnels can then be turned over to the postal service for transporting emails in bulk.
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Old May 20th, 2019, 10:25 AM   #7446
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That is a good idea. Amazon could buy it out. That would make it much easier delivering that mass of parcels reducing all those polluting courier vans pestering the capital.
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Old May 20th, 2019, 12:24 PM   #7447
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There is literally no such thing as a watertight rail tunnel.
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Old May 20th, 2019, 12:32 PM   #7448
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The Connaught tunnel is clearly not one of them now.
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Old May 20th, 2019, 02:30 PM   #7449
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How will a TBM improve the water proofing in an existing tunnel?
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Old May 20th, 2019, 02:42 PM   #7450
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Quote:
Originally Posted by Enzo Morris View Post
All very nice indeed, but your understanding is not in synch. I am relaying what the engineers tell me.
No John, the voices you hear in your head are not those of professional engineers - or even those of normal, sensible people. They probably originated from your peers at the recent AGM of the Village Idiot Association - where I hear you were given a honorary lifetime award.
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Old May 20th, 2019, 02:45 PM   #7451
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Quote:
Originally Posted by ill tonkso View Post
There is literally no such thing as a watertight rail tunnel.
There is literally no such thing as an intelligent or truthful post written by Johns Burns.
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Old May 20th, 2019, 03:06 PM   #7452
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Vulcan's Finest, one poster with more experience of you than me, described you as obnoxious. You and your sort have no case, hence the ad hominem attacks and dreaming up people to attack or support a limp case. Stop getting upset that HS2 will not be as you think it will be. The dropping of the whole, or major parts of it, will be for valid reasons. The House of Lords want a reappraisal for valid reasons. If it was designed properly in the first instance, taking the public behind it, then construction would be going ahead, which has been postponed apart from prelim' works, with no work on the tracks or tunnel boring. Right now TBMs were supposed to be being set up just north of Euston.

But dream on about bullet trains. It is nice to dream. I suppose it is best to have a dreamer than a Luddite.
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How will a TBM improve the water proofing in an existing tunnel?
Are you serious? :LOL:
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Old May 20th, 2019, 03:45 PM   #7453
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Quote:
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Are you serious? :LOL:
Yes.
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Old May 21st, 2019, 08:00 PM   #7454
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Interesting article about possible London City Airport Crossrail station:

https://www.newcivilengineer.com/lat...042626.article
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Old May 25th, 2019, 08:21 PM   #7455
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Double post...
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Old May 25th, 2019, 08:22 PM   #7456
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Went past Dean Street ticket hall for TCR station a couple of days ago. It’s actually looking just about complete (there’s signage up and everything). Could this be a good sign?

On a related note, it seems from the surface anyway that TCR and Farringdon are the two stations that are the most progressed. Would it be possible to open up the central tunnel for operations with just those two stations initially, once the train testing has completed? That way, the tunnel can start operating sooner and can be opened in stages.
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Old May 25th, 2019, 08:31 PM   #7457
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Old May 27th, 2019, 08:42 AM   #7458
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Quote:
Originally Posted by Enzo Morris View Post
They do not put TBMs in a van after use, they are too big, so disassembled, then cleaned & maintained, ready for the next job.

BTW, the Connaught Tunnel had 4 drainage pumps installed with generator backup, rather than fix the water ingress problem properly. They are hoping they will cope for a number of years after handover.
Enzo or Bozo or whatever your real name is, on May 20th you provided a document which gives the proof of my assertion that the Crossrail TBM's WILL NOT BE REUSED. So we can now put this nonsense to bed, and move on to returning the discussion to Crossrail, not HS2.

7. Tunnel boring machines
Advanced design TBMs are essential for the construction of HS2. The TBMs will be purpose-built machines, using proven state-of-the-art technology and will operate 24 hours a day, seven days a week. They will be designed specifically for the project to ensure their reliability in terms of performance and settlement control and to cope with the range of ground conditions expected to be encountered. Further information on settlement control can be found in the Information Paper C3- Ground Settlement.
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Old June 3rd, 2019, 07:01 PM   #7459
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The wrong concrete was used in Bond St station, not the rail tunnels. This is being rectified. Bond St, will still be worked on after opening the line.
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Old June 5th, 2019, 04:42 PM   #7460
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Quote:
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The wrong concrete was used in Bond St station, not the rail tunnels. This is being rectified. Bond St, will still be worked on after opening the line.
Wrong sort of concrete?

How British Rail!
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