juz wanna ask...
-
i noticed the tracks r of 'rusty' color...
is dat rust?
if so is dat done purposefully to protect the layer underneath it, wat they call galvanised?
n hw come raised tracks need rocks n underground tracks dun need rocks? wat r the rocks for? -
Yes, that's rust.
Luckily the tracks come in solid chunky pieces, not empty shells like guey nng gor.
Because it is very unsightly if all that grease dripped onto the ground, and people might be afraid the train would actually slip off its own tracks if they see it. Generally, if you can't see it, you won't ask about it, thats why there aren't any underground. -
dats for the rocks izzit?Originally posted by ditzy:Yes, that's rust. Luckily the tracks come in solid chunky pieces, not empty shells like guey nng gor.
Because it is very unsightly if all that grease dripped onto the ground, and people might be afraid the train would actually slip off its own tracks if they see it. Generally, if you can't see it, you won't ask about it, thats why there aren't any underground.
if so, hw come the tracks look dry to me... -
Because with so many trains passing by every few mins, every train that passes by whips up abit onto its wheels. That's why it seems like it ain't there.Originally posted by alwaysdisturbed:dats for the rocks izzit?
if so, hw come the tracks look dry to me... -
hmmm...icic...Originally posted by ditzy:Because with so many trains passing by every few mins, every train that passes by whips up abit onto its wheels. That's why it seems like it ain't there.
thx for answerin my qns... -
tink again...
wa...
in dat case..
smrt need hw much grease each day?
they grease the tracks every mornin b4 the service starts? -
Pls post the questions @http://mlrts.sgforums.com/?action=thread_display&thread_id=148323&page=1
this thread the next time, thks. -
They don't grease the tracks, they grease the wheels and suspensions.Originally posted by alwaysdisturbed:tink again...
wa...
in dat case..
smrt need hw much grease each day?
they grease the tracks every mornin b4 the service starts? I dunno how much they need, but they must need alot don't you think? -
the outer ones are shiny. the inner ones are rusty...
-
If you take the Changi Airport line and towards Expo, the tracks are white in colour and it is rusting. The original colour of the track is white and after it rust, it becomes brown.
-
I thought its silver/ bronze coloured ?
-
OK! Looks like its the blind leading the blind here. Let's clesr the air a bit.
First up, the tracks. Railway tracks are made of steel, so they rust over time. Yes, that brownish stain is rust. Why are the outer tracks shiny and the inner tracks rusty? Well, that's because the train wheel run on the outer tracks. When steel meets steel, there is a lot of abrasion so any rust formed would be scraped away. The inner rails is to prevent the train from derailing but I'm not very sure how it works.
Next, the rocks that you see on railways is called ballast. Ballast is provided to give support, load transfer and drainage to the track and thereby keep water away from the rails and sleepers. Ballast is made up of stones of granite or a similar material and should be rough in shape to improve the locking of stones. In this way they will better resist movement. Ballast stones with smooth edges do not work so well.
Why aren't there any ballast in the tunnels? It all comes down to cost; cost of building and cost of maintenence. It is reported that ballasted tracks cost 20% less than a nom-ballasted (concrete) base track. However, a ballasted track will require a bigger depth of construction and more maintenence. Therefore, in a structurally restricted area like a tunnel, non-ballasted track is the best option on grounds of low maintenance cost and reduced space requirements. -
Ooh....cool. Thanks for sharing your knowledge. Especially on the ballast. I didn noe underground tunnel didn have them.
-
Originally posted by The_Bus_Guide:
Thanks for sharing. You're quite knowledgeable in these technical stuffs. (In RED) If you notice carefully that the inner rail disappear when the track is at ground level. The Khatib - Yio Chu Kang stretch has quite a long distance at ground level and there is no inner rail. When the track is elevated, the inner rail appears.
OK! Looks like its the blind leading the blind here. Let's clesr the air a bit.
First up, the tracks. Railway tracks are made of steel, so they rust over time. Yes, that brownish stain is rust. Why are the outer tracks shiny and the inner tracks rusty? Well, that's because the train wheel run on the outer tracks. When steel meets steel, there is a lot of abrasion so any rust formed would be scraped away. [b]The inner rails is to prevent the train from derailing but I'm not very sure how it works. [/b] -
theres no inner tracks for KTM, as well as tunnels, and when train is travelling is travelling on ground eg between YCK and Khatib, Kranji and Marsiling.
Any reason? or is it because no bridge is involved? -
What about a 4th/5th track?