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Post by programmes1 on Dec 3, 2007 15:34:09 GMT
Recently went through the station changing from the Picc to Cen noticed at the top of the escalators from the Picc some sort of swing door anyone know what it is / used for? Looks like it could seal off the escalators.
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Post by c5 on Dec 3, 2007 16:40:03 GMT
I think they are also in situ at Baker Street. They look quite hefty and flood proof of sorts.
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Post by railtechnician on Dec 3, 2007 18:47:22 GMT
I think they are also in situ at Baker Street. They look quite hefty and flood proof of sorts. I know the doors to which you refer, I have often wondered if they were installed as blast doors rather than flood proof doors. Of course it may be that they were installed during construction of escalators for the purpose of sealing off the work sites from the rest of the station. At Baker Street the doors there appear to have been installed when the circulating area beneath the Met platforms was enlarged for the new escalators, part of an escalator programme that was completed in 1939. I would not be surprised if the doors at Holborn were installed for the same reason as the stations had to remain open while escalators were installed to replace the original lifts. |
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Post by Deleted on Dec 3, 2007 18:47:56 GMT
Tooting Bdy had a set at Platform level and are flood gates (AFAIK).
However a modern version are being installed - Kings Cross have some - these are fire refuge areas and allow wheelchair users a place of relative safety.
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Post by Deleted on Dec 3, 2007 18:52:42 GMT
I think there are some at Moorgate on the passageways as you go up, as coming from the Northern line platform...
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Post by railtechnician on Dec 3, 2007 19:11:02 GMT
Tooting Bdy had a set at Platform level and are flood gates (AFAIK). However a modern version are being installed - Kings Cross have some - these are fire refuge areas and allow wheelchair users a place of relative safety. No floodgates were installed at Tooting Broadway. However, I suppose they could be used to stem a flood if they were still serviceable. |
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Post by Deleted on Dec 4, 2007 8:26:05 GMT
No floodgates were installed at Tooting Broadway. However, I suppose they could be used to stem a flood if they were still serviceable. So what were those large metal doors installed onto the entrances of the platforms? I can remember the doors being in place - but all that's left today are the door frames. AFAIK they were retro-fitted after the Balham disaster, as the same water main passes within a few feet of the station, plus the water table is very high in the area anyway. |
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Post by JR 15secs on Dec 4, 2007 10:31:12 GMT
No floodgates were installed at Tooting Broadway. However, I suppose they could be used to stem a flood if they were still serviceable. So what were those large metal doors installed onto the entrances of the platforms? I can remember the doors being in place - but all that's left today are the door frames. AFAIK they were retro-fitted after the Balham disaster, as the same water main passes within a few feet of the station, plus the water table is very high in the area anyway. They were watertight doors which were removed during refurb, the ones at Holborn & Baker St and elsewhere are all the same. |
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Post by railtechnician on Dec 4, 2007 11:46:49 GMT
So what were those large metal doors installed onto the entrances of the platforms? I can remember the doors being in place - but all that's left today are the door frames. AFAIK they were retro-fitted after the Balham disaster, as the same water main passes within a few feet of the station, plus the water table is very high in the area anyway. They were watertight doors which were removed during refurb, the ones at Holborn & Baker St and elsewhere are all the same. Yep watertight doors sounds good and was what I alluded to but not floodgates because they are not remotely controlled, detected or otherwise monitored. As for the high water table at Tooting Broadway I recall having to have the inverts there pumped nightly in order to run cables under the platform almost 20 years ago now. |
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Post by JR 15secs on Dec 4, 2007 15:17:53 GMT
quote] Yep watertight doors sounds good and was what I alluded to but not floodgates because they are not remotely controlled, detected or otherwise monitored. As for the high water table at Tooting Broadway I recall having to have the inverts there pumped nightly in order to run cables under the platform almost 20 years ago now. I believe some were monitored. |
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Post by Deleted on Dec 4, 2007 17:38:44 GMT
As for Tooting Broadway, when they were building the station's escy shaft, they found what resembled an underground pond... Somehow they managed to keep the water at bay!
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Post by railtechnician on Dec 4, 2007 18:50:04 GMT
As for Tooting Broadway, when they were building the station's escy shaft, they found what resembled an underground pond... Somehow they managed to keep the water at bay! Believe me there are underground ponds all over the combine, I have seen a few over the years. Back in the 1970s we were hanging cable brackets in the tunnels between Chalk Farm and Golders Green. This involved removing a segment bolt and installing a new one with the bracket. It was not unusual to get a few trickles as there were some stalactites in the tunnel but after one bolt was removed we had a gusher with such force behind it that we couldn't get a bolt into the hole for some time and by then the four foot looked like a river. It gradually drained away but it took a while. One night I drilled a No.10 hole for a cable clip at Lambeth North and flooded the greater part of the platform to a depth of 5mm or so before the leak stopped running. Belsize Park inverts used to regularly fill up but there is actually a waterway crossing at 90 degrees to both inverts, I'm not sure if it's a bricked up river or something else but it cuts the inverts in two with a narrow crawl space over the open 3-4 foot gap. Of course not all the water is due to the water table and leaks. One night I was working in the invert at Liverpool Street when I was aware of a rush of water towards me. It was over a foot deep and rising before it subsided and the water was between me and the egress point at the other end of the platform. That is when I discovered that the lower EMC was automatically pumped into the platform invert! There are plenty of places on the system under water, I have worked in many of them. Some others that spring to mind are Piccadilly Circus Bakerloo, Kennington, Embankment Northern, St.Paul's, Moorgate |
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