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Civil Engineer for the High Jump
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Author:  geezer466 [ Fri Mar 08, 2013 9:47 pm ]
Post subject:  Civil Engineer for the High Jump
http://www.bbc.co.uk/news/uk-england-london-21715329

Quote:
Two construction drills broke through into a railway tunnel in east London on a busy First Capital Connect route.

Services on the Moorgate to Finsbury Park route were stopped after a driver said muddy water had poured on to his roof near Old Street Station.

An hour later, at about 11:00 GMT, two piling drills came through as a train with only a driver and Network Rail manager approached to inspect the area.


Image

Major accident averted I think... If a tube train had hit that drill at speed people would have died.
Author:  Kremmen [ Sat Mar 09, 2013 7:54 am ]
Post subject:  Re: Civil Engineer for the High Jump
Yep, you would think when drilling that deep they would know where underground tunnels are !!!!
Author:  vlad the impailer [ Sat Mar 09, 2013 9:02 am ]
Post subject:  Re: Civil Engineer for the High Jump
i used to work for a co that did this sort of stuff,we always had maps of the area,one just hoped they were accurate :lol:
one time we did stop our van and go over to someone drilling near st johns wood and pointed out to him the mound he was starting to drill on was the top of a "cut and cover" line :o
Author:  SOT [ Sat Mar 09, 2013 10:56 am ]
Post subject:  Re: Civil Engineer for the High Jump
:shock: :o :? I have to say, it is a little scary to think that this can happen, but despite the recession, there is a hell of a lot of construction work going on in London. Just count the tower cranes. A contractor did the same above Wanstead tube a few years ago when a new road was being built. They knew the line was there but though it was deeper. LU engineers had been fully involved in that job and they still broke through
Author:  Jon [ Sat Mar 09, 2013 1:57 pm ]
Post subject:  Re: Civil Engineer for the High Jump
Wow!! Mind you, amazing it doesn't happen more often.
Author:  Kremmen [ Sun Mar 10, 2013 8:13 am ]
Post subject:  Re: Civil Engineer for the High Jump
I often wonder how watertight the lines going under the Thames are ?

Wouldn't take much to flood the system. All we've got is an iron tube which is probably going/gone rusty on the outside and is considerably weaker than when first installed?
Author:  geezer466 [ Sun Mar 10, 2013 11:17 am ]
Post subject:  Re: Civil Engineer for the High Jump
Kremmen wrote:
I often wonder how watertight the lines going under the Thames are ?

Wouldn't take much to flood the system. All we've got is an iron tube which is probably going/gone rusty on the outside and is considerably weaker than when first installed?


First was completed in 1843..... http://en.wikipedia.org/wiki/Thames_Tunnel

Never realised there were so many tunnels and the varying uses they are put too!! http://en.wikipedia.org/wiki/Tunnels_underneath_the_River_Thames

Same could be said for the northbound bore of the Blackwall tunnel which was also built in the late 1800's (this is the one with the height limit and the odd bends within it).

When the tube was first cut they had to divert around plague pits in the City which contained the remains of those who died in the black death. There was a real worry they would release the virus if they opened the pits.
Author:  Brian [ Sun Mar 10, 2013 11:28 am ]
Post subject:  Re: Civil Engineer for the High Jump
I seem to remember an automated underground train system operated by the Post Office.
Author:  geezer466 [ Sun Mar 10, 2013 3:27 pm ]
Post subject:  Re: Civil Engineer for the High Jump
Brian wrote:
I seem to remember an automated underground train system operated by the Post Office.


http://en.wikipedia.org/wiki/London_Post_Office_Railway

Friend of mine used to work on it.
Author:  SOT [ Sun Mar 10, 2013 6:58 pm ]
Post subject:  Re: Civil Engineer for the High Jump
There is so much tunnelling in London at the moment it's quite incredible

On top of The super sewer under the Thames & crossrail running under Oxford st!!!, the £700million Victoria station upgrade involves a huge tunnel from the station, under the bus depot and under the Billy Eliot theatre (can't remember it's name!). Then a huge relief ticket hall is to be built underground in Bressenden place with two staircase shafts coming out nearby (one close to Cardinal place shopping centre).

Some tunnels will be built within within 3m of the circle line and between power, sewage and gas mains. At the moment, around 7000 holes are being drilled by compact drilling machines. The holes are filled with grout - a weak concrete - in order to stabilise the ground to stop any subsidence. It's all very fascinating stuff, but lets hope that - contrary to the engineers at this near tube train disaster in Moorgate - they have done their sums right in SW1!
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