本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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If you are not a Physics person, read on and learn a fact of physics.
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6 f6 }2 w' j8 O1 MTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。Even after you see it, it is still hard to believe!os.tvboxnow.com- v% k8 P6 |, k( H
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
9 Y' d) L6 q# GThis is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. * L" D' F+ G1 `, n; e/ O2 k3 M
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.
" c2 ~. j- r" Q$ LTo those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Question:' ^7 g. ^+ L/ I6 W3 M9 B: ~
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,
) `+ ]8 P" @, U; NOr just the weight of the water? ! `) m$ n+ `- {* a* u/ [
G# J, ^3 D9 ^; Q5 m2 ~Answer:
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It only needs to be designed to withstand the weight of the water!
) T5 y" B8 H" R( Ros.tvboxnow.comWhy? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loaded
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The Incredible Magdeburg Water Bridge in Germany& i' U7 P& B- ]0 k5 O! Z! ?
The Magdeburg Water Bridge is a navigable aqueduct in Germany that connects the Elbe-Havel Canal to the Mittelland Canal and allows ships to cross over the Elbe River. At 918 meters, it is the longest navigable aqueduct in the world.! M+ [2 l5 m, m. f) M& Q
The Elbe-Havel and Mittelland canals had previously met near Magdeburg but on opposite sides of the Elbe Ships moving between the two had to make a 12-kilometer detour, descending from the Mittelland Canal through the Rothensee boat lift into the Elbe, then sailing downstream on the river, before entering the Elbe-Havel Canal through Niegripp lock. Low water levels in the Elbe often prevented fully laden canal barges from making this crossing, requiring time-consuming off-loading of cargo.
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Construction of the water link was started as early as in the 1930s but due to the World War 2 and subsequent division of Germany the work remained suspended till 1997. The aqueduct was finally completed and opened to the public in 2003. os.tvboxnow.com5 @/ y' h2 l8 J
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發表於 2011-10-2 10:09 PM
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發表於 2011-10-4 11:33 AM
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發表於 2011-10-15 09:35 PM
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