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Author Topic: Cool Techie Geeky Stuff...  (Read 3847 times)

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Mac

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Re: Cool Techie Geeky Stuff...
« Reply #60 on: April 26, 2012, 06:50:08 pm »
Hoover Dam Bypass Bridge

Quote
It was amazing all the Engineering and planning that went into building this bridge, especially the continuous slip form pouring of the arch from both sides to meet in the middle; out in the middle of nowhere in 120 plus degree summer heat in the river valley.

They injected liquid Nitrogen into each load of concrete to keep the pouring temperature at 80 degrees or less. to keep it from drying too fast in the extreme heat and cracking. It was all extremely interesting. I hope you enjoy the pictures taken during construction. It's hard to believe.















« Last Edit: April 26, 2012, 06:56:38 pm by Mac »
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