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March 13, 2007

Water Bridge


Water bridge... Over a river!!! Even after you see it, it is still hard to believe ! Water Bridge in Germany.... What a feat! Six years, 500 million euros, 918 meters long.......now this is engineering! This is a channel-bridge over the River Elbe and joins the former East and West Germany, as part of the unification project. It is located in the city of Magdeburg, near Berlin.


The photo was taken on the day of inauguration. To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
Did that bridge have to be designed to withstand the additional weight of ship and barge traffic, or just the weight of the water?
Answer:
It only needs to be designed to withstand the weight of the water! Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
Germany Trogbrücke water bridge Magdeburg

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Comments

Water bridge in Holland. Have a look at this site !

http://aquaduct.hobbysite.info/nednieuw.html

Greetings, Jan.

Posted by: Jan at March 16, 2007 4:19 PM

Amazing engineering work!

Posted by: mark at March 19, 2007 12:18 PM

Be able to support that amount of water is an incredible feat. The water would surely have to be at least a good five feet to allow those boats. Hopefully that bridge doesn't have any unlucky times (imagine a collapse).

Posted by: mike at March 19, 2007 6:53 PM

response to physics question: whether or not the bridge must be designed to support the "extra" weight of the ships and barges depends on the boundary conditions. if the bridge water is enclosed, as in a true bath-tub, then the water level is higher when the water is displaced by a boat, the hydrostatic head is correspondingly greater, and the bridge must support the additional weight. if the ends are open, then the water level remains constant, and, ignoring second order effetcs, the hydrostatic head, and hence the weight to be supported, remains constant. if a boat sinks, the water level goes DOWN, and the weight to be supported diminishes!

Posted by: dan at March 29, 2007 4:24 AM

Amazing engineering work!

Posted by: BABATUNDE OLUSEGUN EMMANUEL at April 13, 2007 8:51 AM

how do the bridge sucks the displaced water. is there any pumping mechanism to pump the amound of displaced water back once the ship reaches its destination?

Posted by: swathi at April 23, 2007 6:39 AM

All praise be to Allah who gave Mankind the intelligence and ability to do wonders on this Earth! Glorified is Him.

After that, congratulations on your great efforts! You've done it, with Allah's Grace.

Posted by: Mohamed Umar at June 20, 2007 10:53 AM

The bridge will have to be designed to take ore weight than the water itself. When we put anything in a water body there is an addition to the total weight (though less than the original wt of the body in air). Hence any addition of mass will increase the total weight.

Posted by: Ajay at August 8, 2007 4:40 AM

this is a nice

Posted by: kate at February 10, 2009 2:07 PM

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