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Old November 16th, 2011, 10:31 PM   #3241
hmmwv
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I think we've seen that new design before, not sure they are still doing a CRH420 considering all the slowing downs, but may be a successor to 350km/h certified CRH2s.
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Old November 17th, 2011, 05:03 AM   #3242
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Since we're talking about the design of the CRH420, is there any new info on the status of the CRH380D?
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Old November 17th, 2011, 12:04 PM   #3243
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Quote:
Originally Posted by hmmwv View Post
I think we've seen that new design before, not sure they are still doing a CRH420 considering all the slowing downs, but may be a successor to 350km/h certified CRH2s.
Yes, I too have seen it before, though it's good to see such a nice design (hopefully) coming out.

I doubt it'll see service much above 350, as hmmwv said, due to slowdowns etc
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Old November 21st, 2011, 12:31 PM   #3244
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a propaganda film of CRH, not too bad.

http://v.youku.com/v_show/id_XMzI0MDg4ODM2.html
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Old November 23rd, 2011, 03:55 PM   #3245
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^Excellent video there.
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Old November 24th, 2011, 06:16 AM   #3246
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They could have shoot a real one... I hope they are shooting documentaries about this huge build up. Does anyone know what National Geographic or Discovery have been doing?
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Old November 24th, 2011, 11:32 AM   #3247
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nice, overlook in the air.

http://v.youku.com/v_show/id_XMzEwMzQ0NzEy.html

http://v.youku.com/v_show/id_XMzEzMDIzOTM2.html

http://v.youku.com/v_show/id_XMzA5NTMxODMy.html
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Old November 24th, 2011, 11:45 AM   #3248
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a small CRH station, but nice. isn't it?

http://v.youku.com/v_show/id_XMjgzNzA2NjIw.html
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Old November 28th, 2011, 10:08 AM   #3249
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Zhaoqing's Xijiang Bridge main arches
China Daily
update: 2011-11-24



On the morning of Nov 12, the main arches of the Xijiang Bridge on the Naning-Guangzhou railway in Zhaoqing, Guangdong province, were joined together after three years of construction.

Xijiang Bridge is located in the upstream of Sanrong Gorge. The bridge floor is 73.5 meters from the apex of the arch. It spans 450 meters, and is the longest railway arch bridge in terms of span length in the world.

The bridge is China's first mid-height, steel box deck arch bridge for railways, according to Zhang Chunxin, deputy general manager of China Zhongtie Major Bridge Engineering Group, contractor of the project.

Liu Chengliang, chief engineer of the Nanning-Guangzhou railway NGZ-8 project, said the bridge is 618.3 meters in full length. It will be completed by the end of next year. "The construction team is speeding up to finish the tail-in work after the arch is joined," Liu said. "The bridge floor is to be installed next month."

Nanning-Guangzhou railway is a key project listed in the nation's Mid and Long-term Plan for Railway Network Construction and the 11th Five-Year Plan for railways. It is a double-line electrified railway for passenger and cargo transportation, connecting Guangdong and Guangxi. Trains on the railway are designed to run at a minimum speed of 200 kilometers per hour. It will take about three hours to travel from Guangzhou to Nanning, saving 11 hours.
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Old November 28th, 2011, 05:11 PM   #3250
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I like arc bridges. Is there any more pictures of this one?
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Old November 29th, 2011, 02:05 PM   #3251
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I think it's the best of China.

http://www.tudou.com/programs/view/Sx13ZUR0Rh4/
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Old December 5th, 2011, 10:02 AM   #3252
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china maquina de minerales~~~
www.chinazhongke.net/esp
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Old December 6th, 2011, 05:28 PM   #3253
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Guys, I don't know if any of you have spotted this, but I'm unnerved by the design in this picture:


link:http://img.ph.126.net/BUOeg0DMfoba04...3673245532.jpg

It clearly shows that the structural supports holding up the platform roofing are also used as catenary poles. To me, that is a disaster waiting to happen: does the name "Eschede" ring a bell for anyone? The world's worst high speed train accident was exacerbated by the fact that the bridge the train knocked down had its critical support pylons placed directly next to the track. Looking back at this CRH station, it seems that any derailment while the train is passing through the station could compromise the structural stability of this station.



I'm not blasting the Chinese for "poor quality construction" for this. This just seems to be one of the many problems that arise when one swallows 40 years of expertise and tries to digest it in little more than five--the overlooking of small details. At least I'm glad that not all stations share this compromised design:


link: http://upload.wikimedia.org/wikipedi...-_P1080117.JPG

Last edited by Silver Swordsman; December 7th, 2011 at 07:40 PM.
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Old December 6th, 2011, 05:36 PM   #3254
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The photo don't work. I think it could be due to hot linking or something like that.
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Old December 7th, 2011, 03:56 AM   #3255
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Quote:
Originally Posted by cnzhongke View Post
china maquina de minerales~~~
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Hmm good point.

But from what it looks like, it seems to me that the catenary wires are attached to the pylons on one side of the platform only. That side seems to be for stopping trains. On the passing tracks in the middle (or left of picture), it seems that the poles are separate from the pylons. Which would be the safe method. Am I right?

That being the case, the trains on passing tracks would be for fast trains that are not stopping. So I dont think Eschede could happen here.
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Old December 7th, 2011, 04:00 AM   #3256
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If a derailment happens at full speed in a station, roof is the last thing you would worry Cars flying at 300km/h will demolish everything anyway. It is really a small station as far as I can tell so roof supports will be always under "danger".
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Old December 7th, 2011, 07:24 AM   #3257
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Could you put some markings on the picture so that we can better understand what you are talking about?
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Old December 7th, 2011, 08:15 AM   #3258
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Quote:
Originally Posted by foxmulder View Post
If a derailment happens at full speed in a station, roof is the last thing you would worry Cars flying at 300km/h will demolish everything anyway. It is really a small station as far as I can tell so roof supports will be always under "danger".
I guess if a derailment occurring at 300 km/h even in a small TGV station like Haute-Picardie there would be cars flying all over the place causing casualties and damaging any structures in the close vicinity. Perhaps they should have grade separated the passing tracks with crash barriers or some sort of shell to contain any derailing train. Or they could completely separate the passing tracks from the station tracks like the stations on HS1 in the UK.

BTW the video renderings of Calif. HSR for stations at Fresno and Ontario airport also show similar layouts.
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Old December 7th, 2011, 08:49 AM   #3259
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Quote:
Originally Posted by Smooth Indian

I guess if a derailment occurring at 300 km/h even in a small TGV station like Haute-Picardie there would be cars flying all over the place
Don't forget that when that TGV derailed at cruising speed, nobody died because of the way the TGV is designed. Instead of 10 short TGV coaches flying around, the articulated design kept everything rigidly together so it was 200 meters of train derailing.

The disaster in Eschede wouldn't have been that big either, if that ICE had an articulated design.
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Old December 7th, 2011, 07:48 PM   #3260
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If there was a "full-blown" derailment (like natural jackknifing), then I would agree, it wouldn't make much of a difference. However, in most derailment cases, the train usually remains mostly on the track due to inertia, with minimal lateral shifting. The design of the station, specifically, the row of pillars between the tracks in the foreground and those in the background, substantially lower the margin for error, and hence, greatly reduce the margin of safety.

Placing load-bearing pylons within two meters of a moving train... all that train has to do is to tip over by a few degrees and it's game over.

@Huhu: See below picture. The pylons in question are circled in red. Note (the blue line) that they are very close to the tracks since they also serve as catenary poles.



@AlexNL, I disagree that Eschede would have been better if the ICE used articulated carriages. Looking at the wreck, cars 1-3 stayed relatively upright even though they used normal carriages. The rest of the train knocked over and plowed into a 300 tonne bridge. Eschede was the worst-case scenario.

Last edited by Silver Swordsman; December 7th, 2011 at 07:57 PM.
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