本帖最後由 lilitan008 於 2011-10-3 12:57 PM 編輯
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1 B0 M" q( u* I; `/ SIf you are not a Physics person, read on and learn a fact of physics. 公仔箱論壇9 d% B9 y) w$ x; Q% ]6 i) C
AMAZING!
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; D0 Z$ G) C$ Q! [2 i7 o6 }" i公仔箱論壇Even after you see it, it is still hard to believe!
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* T' I& w6 |8 ~6 VMagdeburg Water Bridge in Germany What a feat! Six years, 500 million euros, 918 meters long. Now this is engineering! ) G, s( B; q$ S$ {0 M, u
This is a channel-bridge over the River Elbe and joins the former East and West Germany as part of the unification project. / Q1 z e5 [& C! o2 p) ?
It is located in the city of Magdeburg, near Berlin.
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W) {( o. `8 x& C# j3 H/ [& vThe photo was taken on the day of inauguration.+ {" m) V5 s8 ^* d
To those who appreciate engineering projects, here's a puzzle for you armchair engineers and physicists.5.39.217.76) G5 {/ C- C# @. D' G1 T' O
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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7 x* L0 @# K4 L; Q
Or just the weight of the water?
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It only needs to be designed to withstand the weight of the water!
3 |' P1 C2 T' \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。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公仔箱論壇; `; F# { s6 ~
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The Incredible Magdeburg Water Bridge in Germanytvb now,tvbnow,bttvb& V. P, c: K3 Y; w8 e; n
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.公仔箱論壇" k: F: ^" }4 ?. `( z) m
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. , S! \ u6 n/ {' H
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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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