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Old March 16th, 2012, 03:21 PM   #3661
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CRH1E

http://v.youku.com/v_show/id_XMzU0MDc3NDA0.html

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Old March 16th, 2012, 03:26 PM   #3662
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Wenzhou-Fuzhou

http://v.youku.com/v_show/id_XMzQ2NjMwMTYw.html

http://v.youku.com/v_show/id_XMzQ2NzA0MTQw.html
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Old March 16th, 2012, 03:28 PM   #3663
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So the 'collapse' actually was the sinking of the foundation by 3.3mm?
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Old March 16th, 2012, 03:30 PM   #3664
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nice

http://v.youku.com/v_show/id_XMzY0MzkxMDY4.html
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Old March 16th, 2012, 04:24 PM   #3665
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Quote:
Originally Posted by Pansori View Post
So the 'collapse' actually was the sinking of the foundation by 3.3mm?
Yeah.

Speaking of which, since that kind of subsidence cannot be seen by the human eye, or normally measured during maintenance checks, it probably means that they had some sort of trackside monitoring system that detected such phenomena, which means that they did include these subsystems...

Looking at the new catenary poles in the pictures, it seems like they added grounding wires (the absence of which the Wenzhou collision was partially attributed to), which means they did take these extra safety precautions seriously.

If my conjectures are true: faith in CRH is somewhat restored...
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Old March 16th, 2012, 08:47 PM   #3666
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beijing - shanghai on G1 train
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Old March 17th, 2012, 02:06 AM   #3667
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Cute little video, thanks for sharing.
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Old March 17th, 2012, 02:23 AM   #3668
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Cool videos. Thank you for posting!
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Old March 17th, 2012, 06:11 PM   #3669
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Has the direct train schedule between Longhua and Futian been disclosed?
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Old March 17th, 2012, 11:57 PM   #3670
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Has the direct train schedule between Longhua and Futian been disclosed?
You should take Shenzhen Metro.
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Old March 18th, 2012, 12:35 PM   #3671
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Quote:
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so it seems to be surface section just washed away?
Nothing was washed away, the foundation sank close to 4mm, which is over the 3mm tolerance, so they had to redo the entire stretch, what you are see is excavating the already completed track bed and reinforce the foundation below with more rocks. The entire CRH system is built to such high standard the margin of error is very small, so even a 4mm sunk, which is invisible to the naked eye, could potentially cause series problems during operation. They need to take every small incident like this seriously to ensure the long term safety and efficiency of the CRH system. I don't blame Western media to blow this thing out of proportion at all, it shows how few problems they can dig up now, and it promotes MOR to adopt a zero tolerance policy towards quality control.
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Old March 18th, 2012, 12:41 PM   #3672
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Quote:
Originally Posted by Silver Swordsman View Post
Yeah.

Speaking of which, since that kind of subsidence cannot be seen by the human eye, or normally measured during maintenance checks, it probably means that they had some sort of trackside monitoring system that detected such phenomena, which means that they did include these subsystems...

Looking at the new catenary poles in the pictures, it seems like they added grounding wires (the absence of which the Wenzhou collision was partially attributed to), which means they did take these extra safety precautions seriously.

If my conjectures are true: faith in CRH is somewhat restored...
Catenary poles are always grounded, the problem was that some track side sensors and data I/O units for the ATC were not grounded properly and prone to malfunction when stricken by lighting.
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Old March 18th, 2012, 12:48 PM   #3673
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Quote:
Originally Posted by yaohua2000 View Post
There were several videos posted before but the altitude wasn't so high so I assumed it was an AR.Drone, since it's probably the easiest civilian UAV to obtain that has HD video recording capability. But the new video is clearly out of AR.Drone's reach so it must be some rather expensive gas powered helicopter such as that Yamaha one.
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Old March 18th, 2012, 12:49 PM   #3674
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Sorry. Shenzhen Metro Line 4 does not actually go to Futian station.

How about the schedule and prices for Longhua-Guangzhou South-Wuhan direct trains?
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Old March 18th, 2012, 02:27 PM   #3675
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Quote:
Originally Posted by hmmwv View Post
Nothing was washed away, the foundation sank close to 4mm, which is over the 3mm tolerance, so they had to redo the entire stretch, what you are see is excavating the already completed track bed and reinforce the foundation below with more rocks. The entire CRH system is built to such high standard the margin of error is very small, so even a 4mm sunk, which is invisible to the naked eye
I agree with your main point that nothing was "washed away", but I do have to make a short comment here: the human eye can see things much smaller than 1 mm, so 4 mm isn't a problem at all.
Of course there is the question of the distance from which you are looking at, and how gradual the sinking was, but you can't outright say that 4 mm sinking is invisible to the naked eye.
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Old March 18th, 2012, 03:22 PM   #3676
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Quote:
Originally Posted by hmmwv View Post
There were several videos posted before but the altitude wasn't so high so I assumed it was an AR.Drone, since it's probably the easiest civilian UAV to obtain that has HD video recording capability. But the new video is clearly out of AR.Drone's reach so it must be some rather expensive gas powered helicopter such as that Yamaha one.
Or maybe strapped a GoPro to it? Nice vid btw.
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Old March 18th, 2012, 04:07 PM   #3677
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Quote:
Originally Posted by hmmwv View Post
Catenary poles are always grounded, the problem was that some track side sensors and data I/O units for the ATC were not grounded properly and prone to malfunction when stricken by lighting.
When I meant "grounding wire" I'm not referring to the fact that the poles are grounded: I'm referring to the installation of a wire that runs above each pole so that lightning strikes wouldn't hit other wires or components that would otherwise be compromised in the event of a lightning strike.

I talked with a maintenance manager from THSR while railroading: he pointed out that the top wires, which run the entire length of the line (minus tunnels), are designed so that the lines, being situated higher up, would attract lightning and divert it away from the critical subsystems:




On the other hand, when we look at the older (pre-Wenzhou) CRH catenaries, we see that no such protection exists:



Now, if we go back and look at the pics in Hubei where the subsidence occured, you can see that there are now lines at the top, too.

image hosted on flickr
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Old March 18th, 2012, 04:39 PM   #3678
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a picture of HSR running in snow



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Old March 19th, 2012, 07:29 AM   #3679
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Harbin West station

Located in harbin, Heilongjiang Province

Opening on July 1st 2012, for Harbin-Dalian HSR











construction (Sep 2011)



source

Last edited by big-dog; March 19th, 2012 at 07:54 AM.
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Old March 19th, 2012, 08:41 AM   #3680
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High-speed bound

By Niu Yixin
2012-3-19
shanghaidaily.com


image hosted on flickr

A woman and her daughter go to board the Shanghai-Nanjing high-speed train at the Shanghai Railway Station yesterday. Starting tomorrow, Shanghai rail authorities will add more trains to the Shanghai-Nanjing and Shanghai-Hangzhou high-speed railway routes, providing 74 and 37 trains on the weekends, respectively, compared with 69 and 34 before.
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