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.
& H( v8 M) y# d3 D3 ]3 ptvb now,tvbnow,bttvbAMAZING!
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Even after you see it, it is still hard to believe!
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Magdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering!
/ M h( {* g. u. \8 `公仔箱論壇This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. TVBNOW 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。! D6 |- _; B0 B9 ]
It is located in the city of Magdeburg, near Berlin.
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The photo was taken on the day of inauguration.5.39.217.76* B0 u8 E0 l! y; I ^3 Z
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.
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Did that bridge have to be designed to withstand the additional weight of ship and barge traffic,公仔箱論壇& `' F2 p* Y) @. a6 N& u
Or just the weight of the water? l# N9 S- L, V9 ]
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It only needs to be designed to withstand the weight of the water! 公仔箱論壇6 A( k2 X! T9 S2 ~
Why? A ship always displaces an amount of water that weighs the same as the ship, regardless of how heavily a ship may be loadedtvb now,tvbnow,bttvb* `" s- w4 c7 D- j0 T# T- H& J
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The Incredible Magdeburg Water Bridge in Germany
) F y2 l+ A1 y. A) K# kThe 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.5.39.217.76( p O# }5 Y3 g8 k @1 s
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.
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