Another super engineering in China shocks the world

[onebyone]

 

[MReynolds]

Apparently this is for a high speed rail. IMO, it would have been easier and cheaper to build at grade level and just engineer at the approach of the hills on each end of the project.

 

[shadows888]

Apparently this is for a high speed rail. IMO, it would have been easier and cheaper to build at grade level and just engineer at the approach of the hills on each end of the project.

thats ghetto af. you put them up so you don't have road intersections issues ever. and obviously it stays even, only way to get a stable high speed train.

 

[powastick]

No information on the bridge. Where is this?

 

[Dungeness]

This is Chinese "Elephant Walk":

This is the original "Elephant Walk":

Which is more awesome? Take your pick

 

[letsrock]

Apparently this is for a high speed rail. IMO, it would have been easier and cheaper to build at grade level and just engineer at the approach of the hills on each end of the project.

As much as I admire chinese engineering i kinda agree with this comment. Why do chinese built such monstrous structures which ruins the view for miles. Now almost everyhouse in that city has to deal with one huge ugly concrete wall in the background. Why not build at level maybe a bit less speed and cover it with some vegetation ?

 

[MReynolds]

thats ghetto af. you put them up so you don't have road intersections issues ever. and obviously it stays even, only way to get a stable high speed train.

Why not have the road go underneath the tracks when the two intersects?

 

[KhanBaba2]

What were the e design considerations to build it so high.

 

[Dungeness]

As much as I admire chinese engineering i kinda agree with this comment. Why do chinese built such monstrous structures which ruins the view for miles. Now almost everyhouse in that city has to deal with one huge ugly concrete wall in the background. Why not build at level maybe a bit less speed and cover it with some vegetation ?

There are some valid reasons that most of China's high speed rail tracks are laid on bridges:

1. Save farm land;
2. Save demolition and allocation costs;
3. Avoid accidents caused by pedestrians and animals;
4. Much less uneven ground settlement and shift, which is critical to high speed rail.

 

[Indos]

What were the e design considerations to build it so high.

Good question

 

[Dungeness]

What were the e design considerations to build it so high.

Ground grading.

 

[OIO]

What were the e design considerations to build it so high.

because it looks more great.

 

[lcloo]

Viaducts are expensive than simply laid rail tracks on ground levels, but they are being built out of necessity.

1) Highspeed trains currently travel at around 300km/hr, and in near future the speed may go up to 500km/hr or even above 600km/hr. Safety is the most serious concern. Viaduct ensure no trespasser or wild and domestic animals will be hit by a highspeed train, especially in areas with frequent human activities and wild animal migration. Any accident with a train moving at 300km/hr will cause large number of death and injures to the passengers. And in future when train travels at 600km/hr, any accident will be worst than an airline crash.

2) Unlike low speed trains that can travel down and up hills and flat land at ease due to their slow speed, high speed trains are restricted to travel at minimum gradients. A gradients of just a few degree will require the train to slow down to prevent derail accidents. Viaduct ensure level travel distance and minimum gradient when travelling in uneven grounds.

3) Viaduct ensure minimum farmlands are acquired for railway use. Farm lands are scarce in China, especially with 1.4 billion people to feed.

4) Ease of maintenance. Viaducts are expensive to build but are easier to maintain than ground level railways as it is less affected by forces of nature like typhoon and flood etc as the rails are laid on strong concrete structure. In long term, it is more economical to maintain.

 

[OIO]

MengHua railway, heavy haul freight railway for coal.

 

[casual]

Apparently this is for a high speed rail. IMO, it would have been easier and cheaper to build at grade level and just engineer at the approach of the hills on each end of the project.

maybe it was designed for maglev? for maglev train tracks to work, it needs to be level.