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Chris from Nailsea
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« Reply #1995 on: August 19, 2013, 17:06:37 » |
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Meanwhile, may I offer you a very warm welcome to the Coffee Shop forum, ironstone11, and thank you for posting some useful information in your very first contribution to this particular discussion!  |
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William Huskisson MP▸ was the first person to be killed by a train while crossing the tracks, in 1830. Many more have died in the same way since then. Don't take a chance: stop, look, listen.
"Level crossings are safe, unless they are used in an unsafe manner." Discuss.
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ellendune
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« Reply #1996 on: August 19, 2013, 18:58:09 » |
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Welcome to from me. I had assumed that P8/9 were beyond a crane lift from the North side so they would be lifted in from the south over the existing station building.
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ironstone11
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« Reply #1997 on: August 19, 2013, 21:03:17 » |
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PS, just backtracked through the webcam pics, the move through the station was in the middle of the night. One way they could get over to P8/9 is with those large polystyrene blocks that they place in the gap between the platforms, didn't someone report a while back that some escalator sections had been delivered like that? Then once on the island I think they've got a 'spider crane' over there, that can probably lift that sort of load quite easily. For example one of these sort of things: http://www.ggrrail.com/mini-cranes/urw-094 Paul Very awkward manoevre as they have to be lifted between the two supporting beams and then rotated thru 90 degrees and then lowered into place. We shall see how many sections they manage to install, or at least move from the forecourt, tonight. I am surprised they have not been craned from the south entrance forecourt. Weight of the big crane is perhaps too much for the hollow forecourt. |
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paul7575
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« Reply #1998 on: August 19, 2013, 22:30:11 » |
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Welcome to from me. I had assumed that P8/9 were beyond a crane lift from the North side so they would be lifted in from the south over the existing station building.
I don't recall any use so far of a mobile crane from the south side over the 3 Guineas or main entrance buildings. Much of the P8/9 roof work was done either when the north tower crane was still available, or with a long lift from the north side using a mobile with a very long reach jib. If I get time tomorrow I'll have a look back and see whats shown in the webcam history... Paul |
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ellendune
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« Reply #1999 on: August 19, 2013, 22:44:13 » |
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I am pretty sure it has not been done before. I do not recall seeing a crane from the north side reach further than P10/11. I think the sections on P8/9 were done when the tower crane was still in place. Working from the South side may be a shorter reach.
I would expect the P1/2 and P3/7 sections to be done from the south, but as you say these sections are not the right size for P1/2 and they are not ready yet for P3/7
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stuving
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« Reply #2000 on: August 19, 2013, 23:05:47 » |
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Have you spotted that another section has been wheeled into the station already tonight? And where are they going - hasn't anyone been there today and tripped over a spare bit of canopy?
PS: as of 23:00, make that two more.
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« Last Edit: August 20, 2013, 12:14:06 by stuving »
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ellendune
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« Reply #2001 on: August 19, 2013, 23:10:30 » |
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So I am wrong. I also notice that live departure boards have no trains on p7/8/9 at the moment. So I suppose its the large polystyrene blocks in use again.
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stuving
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« Reply #2002 on: August 19, 2013, 23:18:57 » |
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So I am wrong. I also notice that live departure boards have no trains on p7/8/9 at the moment. So I suppose its the large polystyrene blocks in use again.
In fact there are still trains on 9 - and were after midnight last night too. Maybe they (the canopy sections, of course) are being raised later on? |
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« Last Edit: August 20, 2013, 11:42:39 by stuving »
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paul7575
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« Reply #2003 on: August 19, 2013, 23:45:02 » |
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They could just be stacking them on the P8/9 island for now? We need someone to have a look tomorrow...
Paul
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paul7575
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« Reply #2004 on: August 20, 2013, 10:57:07 » |
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I am pretty sure it has not been done before. I do not recall seeing a crane from the north side reach further than P10/11. I think the sections on P8/9 were done when the tower crane was still in place. Working from the South side may be a shorter reach.
Ah, it turns we both mis-remembered! The earlier canopy sections on the London side of P8/9 (those that have been in place some time surrounding the ETFE skylights) were installed overnight Sat/Sun 20/21 October, using a mobile crane positioned between platforms 11 and 12, and of course that area was still a building site at that time, accessible to road vehicles such as mobile cranes. The island platform 12/13 tower crane was yet to be installed by that stage. Also, as you say it was the canopy sections on P10/11 island that were installed using a large Ainscough crane operating from the north side car park, there's an example of this in progress on Sunday 24th Feb around 0800. That was done when the tower crane was still present, but presumably the loads were too great for it? Paul |
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Jason
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« Reply #2005 on: August 20, 2013, 11:18:04 » |
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They could just be stacking them on the P8/9 island for now? We need someone to have a look tomorrow...
I'm pretty sure they were installed overnight on P8/P9, my train came in on P12 and blocked my view. Camera 01#01 is back online and appears to confirm this compared to 5 days ago. |
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ironstone11
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« Reply #2006 on: August 20, 2013, 11:28:37 » |
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Also, as you say it was the canopy sections on P10/11 island that were installed using a large Ainscough crane operating from the north side car park, there's an example of this in progress on Sunday 24th Feb around 0800. That was done when the tower crane was still present, but presumably the loads were too great for it?
Paul
Cam 01/1 is now back in action and shows the three new canopy panels in place on P8/9. They must have been lifted with the spider crane, but surprised it could lift that load at the reach that would be required. |
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paul7575
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« Reply #2007 on: August 20, 2013, 11:50:00 » |
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I think when I looked last weekend there was a gap in the horizontal girders about half way along the steelwork, possibly where the platform buildings are going to be. Difficult to describe in writing, but suppose the sections would be delivered into that gap orientated across the island, then lifted just above girder height, then some mobile device (and you'd really only need a high reach fork-lift) could then move along the centre of the platform and carry them into position. The way they are manhandled about on those trollies suggests there's not a huge weight to deal with. It's a pity the relevant webcam has been down for a few days, perhaps they can afford to keep it going overnight this time. Time was when it was 24/7 coverage, but so many of them now switch off overnight...  Paul |
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IndustryInsider
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« Reply #2008 on: August 20, 2013, 12:07:31 » |
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The first concrete support for the viaduct at the western end has been completed. You can't quite see it on the webcam due to the abundance of reinforcing rods for other supports.
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To view my GWML▸ Electrification cab video 'before and after' video comparison, as well as other videos of the new layout at Reading and 'before and after' comparisons of the Cotswold Line Redoubling scheme, see: http://www.dailymotion.com/user/IndustryInsider/ |
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paul7575
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« Reply #2009 on: August 20, 2013, 13:34:52 » |
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The first concrete support for the viaduct at the western end has been completed. You can't quite see it on the webcam due to the abundance of reinforcing rods for other supports.
I noticed the other day there seem to be two significantly different sizes of 'concrete slabs' for the piers, and it turns out from the planning drawings that the piers themselves are either 2.0 or 1.2 metres in thickness. The larger piers are the fixed ends of the 25 metre viaduct sections, alternating with the floating ends, and the larger pier foundation slabs have twice the area, where that increase is all in the length along the viaduct. For info the section in the webcam 6/2 view will have 14 spans over 350 metres. Paul |
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