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Ever seen a train lay its own tracks ???

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akadaka
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« on: July 13, 2011, 06:45:12 pm »

    holy shit......who's the genius that made this machine




http://www.wimp.com/traintrack
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Kiwithrottlejockey
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« Reply #1 on: July 13, 2011, 06:51:54 pm »



Tracked vehicles (bulldozers, diggers, army tanks, etc.) have ALWAYS laid their own tracks! 
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akadaka
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« Reply #2 on: July 13, 2011, 06:57:08 pm »

what a machine though.....do we have anything like it here??
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Kiwithrottlejockey
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« Reply #3 on: July 13, 2011, 08:04:06 pm »


There is a track-laying machine/train in NZ used for laying long-length rails and new concrete sleepers.

It is towed around by a locomotive between jobs, but while it is working, the train is towed by a big bulldozer, with the actual track being laid by the first vehicle behind the bulldozer. Everything behind that is carrying the rails and sleepers which are continuously fed foward to the first vehicle which contains the machinery which actually lays it. Everything behind the centre of the first vehicle is running on the freshly-laid track.

It has been around since about 1977, although it has been rebuilt & modernised a few times over the years.

It was recently working in Wairarapa re-laying long stretches of track.

Before that it was working on the second main line up to Waikanae.

Presumably it has been doing a lot of work in the Auckland area over the past few years.
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nitpicker1
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« Reply #4 on: July 13, 2011, 09:29:20 pm »


I am "overawed" Shocked
What lays the original line of ballast?
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Kiwithrottlejockey
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« Reply #5 on: July 13, 2011, 11:49:53 pm »


In New Zealand, the track-laying train lays the new sleepers & rails straight onto the prepared roadbed.

There is no ballast on it at that stage.

Later, a ballast train comes along (with specialist bottom and side dumping ballast wagons) and spreads ballast on the track.

Next, a ballast tamper runs over the newly ballasted track and lifts & packs the track.

Finally, a ballast regulator runs over the ballasted track and shapes it to finish the job off.

They then place a temporary speed restriction on the track (usually 40km/h) for a couple of weeks to let it settle. Sometimes, they'll lift the temporary speed restriction to 70km/h for the second week before removing the speed restriction and allowing normal speed operations. Often, they'll spot-tamp the track a few months later to get rid of any minor rough spots which have developed. They use smaller specialised tampers for that....some contractors in NZ even now have small tampers that attach on the end of a digger arm. I know Fulton Hogan have a few of those tampers, as do a couple of other companies.
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nitpicker1
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« Reply #6 on: July 14, 2011, 08:12:35 am »


I am "overawed" Shocked
What lays the original line of ballast?

Quote
In New Zealand, the track-laying train lays the new sleepers & rails straight onto the prepared roadbed.

the roadbed in the vid seemed to already be in place when it dropped the sleepers in, on ballast that was raked up after the sleepers were laid ?

buggr, now I'm gonna have to watch it for the fourth time, or wait till it comes to NZ to reclaim someones cycle tracks


 
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