Building the high speed train-line (huge)

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Our firm was called for help because there's a problem with one pier of the bridge,the foundation level is 1 inch decreased since the realisation and still decreasing.
So brought my camera and walked the track for a few miles to end by the problem

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X 17-55 dx
 
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Jan 26, 2005
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Viera Fl
Wow Hans,
That is quite an undertaking. Good job. Images and color is teriffic.

Thank you much for sharing.

Regards

Nena's Auntie
 
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Feb 21, 2005
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Ottawa, Ontario
What fascinating images Hans!

I nearly didn't look at this thread because of your "Huge" warning, but now I'm glad I did. There's something fascinating about the lines that the eye is led through. Well done.

Neil
 
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Feb 5, 2005
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4,084
Our firm was called for help because there's a problem with one pier of the bridge,the foundation level is 1 inch decreased since the realisation and still decreasing.
So brought my camera and walked the track for a few miles to end by the problem
Hans :


Hmmm... Unusual subsidence.

Pier depth inadequate ? Voids under the pier base ? Is the subsidence on a water pier or a land pier ?

Always fascinating to try and think these things through.

And great shots, BTW.



John P.
 
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Feb 5, 2005
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The Netherlands
John

It's on a water pier,foundation is 8 steelpiles approx. 40meters diameter
1820 with a concrete top on it.
No disruption in soil investigation,have to check the pile reports yet
but speaking with the piling crew that pier had a low blow count.......
(IHC sc 280)
 
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Feb 5, 2005
Messages
4,084
hans said:
It's on a water pier,foundation is 8 steelpiles approx. 40meters diameter 1820 with a concrete top on it.
No disruption in soil investigation,have to check the pile reports yet
but speaking with the piling crew that pier had a low blow count.......
(IHC sc 280)
Hans :

Hurm. Not my side of engineering normally, but doesn't that indicate low bearing capacity ?

Blow counts I've encountered were the American standard for this, "The number of blows of a 140-lb. hammer falling onto drill rods from a height of 30 inches it takes to advance the split barrel sampler a distance of one foot."

Wouldn't finding a low blow count normally call for remedial action to address this before the final piling/pier construction ? I'm a bit puzzled...

In any case, good photos for the case study. It made me think on a Sunday morning.


John P.
 
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Jan 29, 2005
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Location
St. George, Utah
hans said:
Thank you all

Gordon my knowledge of the English language is failing to understand completely your statement can you explain?
In the old days they had tons of workers that would lay wooden tie's crosswise with the rails on top of them and then drive large nails or cletes to cinch the rails to the wooden tie. The high speed trains are a far cry from that era.
 

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